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Lithium‐ion insertion/deinsertion in anode at slow rates limits the power performance of energy storage devices. Here, a new pseudocapacitive electrode with high reversible capacity during cycling has been proposed for a lithium‐ion capacitor. The lithium‐fluoride garnet, namely Na3Fe2Li3F12, is obtained via precipitation from an aqueous solution at room temperature using abundant materials and exhibits a high discharge capacity of 746 mAh g−1. After the first charging cycle, the energy is stored via fast pseudocapacitive faradaic reactions which are facilitated by the nanocrystalline transport pathways with no structural modification to the electrode. The high stability window of F‐garnet allows extracting cell voltages of 2.2–3.2 V in a lithium‐ion capacitor where it is coupled with a porous carbon‐based positive electrode, with a high energy efficiency of 93 % maintained for 10000 charge/discharge cycles. This study opens a new research direction concerning pseudocapacitive anode materials for enhancing power performance and even replacing the traditional battery‐like anode materials. [ABSTRACT FROM AUTHOR]

Owing to their adjustable redox‐active sites, designable structures high porosity, and fully activated organic ligands, pristine metal‐organic frameworks (MOFs) have been widely utilized as advanced electrode materials (i. e. both anodes and cathodes) for sodium‐ion batteries (SIBs) to satisfied the insertion/extraction larger size and mass of Na+ cations, achieving significant progresses with excellent electrochemical performance in electrochemical energy storage devices. Here, the recent advances on pristine MOFs as anodes and cathodes for SIBs are summarized. A thorough investigation delves into the detailed characteristics, energy storage mechanisms, and electrochemical performance of diverse pristine MOFs for SIBs are also clarified. Furthermore, the outlooks on pristine MOF electrodes in SIBs are also provided. [ABSTRACT FROM AUTHOR]

Silicon oxides (SiO, SiO2) with high theoretical capacity and low cost are viewed as promising anodes for the next‐generation lithium‐ion batteries (LIBs) but suffer from inferior rate capability and coulombic efficiency (CE) owing to the sluggish charge transfer kinetics. Herein, the study proposes a multichannel modulation strategy induced by ZSM‐5 and SiO as well as electron‐rich graphene to effectively solve the above issue. Specially, the ZSM‐5, which can not only provide a certain Li+ reserve capacity as an anode material, but also serve as a bridge to connect the isolated SiO nanoparticles, providing Li+ transport channel and adjusting the transfer kinetic, making it to achieve two things at one stroke, so that the as‐obtained SiO@ZSM@Gra composite shows improved rate performance and CE compared to that of single silicon oxides. Combing with the CV and EIS fitting analysis, it is demonstrated that the constructed composites own higher Li+ diffusion coefficient and more charge conduction capability. Furthermore, the fabricated full cell with LiNi0.8Co0.1Mn0.1O2 exhibits good electro‐chemical properties. The proposed strategy for intrinsic accelerating charge transfer can be conductive to electrode design for the next‐generation low cost and high energy LIBs. [ABSTRACT FROM AUTHOR]

Aqueous electrolytes are praised for their inherent safety, cost‐effectiveness, and minimal environmental impact, making aqueous potassium‐ion batteries (APIBs) a viable alternative for sustainable and eco‐friendly energy solutions. Researchers have endeavored to anode materials that align with the unique requirements of aqueous electrolytes, and some proud achievements are made. The research about APIBs anode has focused on organic materials and polyanionic compounds, both exhibiting desirable hydrated potassium storage performance, and in recent years, on the development of metal compounds and alloy‐based materials with high theoretical capacities. However, the anode of APIBs faces a narrow electrochemical stability window (ESW) caused by aqueous electrolytes and volume expansion problems due to the large radius of potassium ions, which prevents them from exhibiting appreciable capacity with satisfactory cycling stability. This review meticulously delineates the latest advancements and representative materials for the anode of APIBs and introduces several common aqueous electrolytes and effective improvement strategies for them. The focus is on the advantages and bottlenecks faced by different types of anode materials, culminating in a proposed methodology to enhance APIBs anode efficacy. This review endeavors to furnish novel perspectives on the development and pragmatic deployment of APIBs anodes. [ABSTRACT FROM AUTHOR]

Using coal-based polyaniline as a carbon source and nitrogen source, nitrogen-doped carbon nanotubes (NCNTs) were successfully prepared through a two-stage furnace process. The PtPd/NCNTs catalysts were synthesized by the ethylene glycol reduction method. The results of transmission electron microscopy (TEM) show that the PtPd nanoparticles with an averaged diameter of 3.1 ± 0.5 nm uniformly support the surface of NCNTs. The X-ray photoelectron spectroscopy (XPS) reveals that nitrogen mainly exists in graphite states in NCNTs. The electrocatalytic activity of the PtPd/NCNTs catalyst was tested by CO stripping voltammetry, cyclic voltammetry (CV), and chronoamperometry (CA). The electrochemical characterization shows that the PtPd/NCNTs catalyst exhibited higher electrocatalytic activity and stability towards formic acid oxidation. At the same time, its forward peak current density (549.83 mA mg−1) is 4.5 times higher than that of PtPd/CNTs (120.90 mA mg−1). The developed NCNTs are highly promising catalyst supports for direct formic acid fuel cells. [ABSTRACT FROM AUTHOR]

To unveil the charge storage mechanisms and interface properties of electrode materials is very challenging for Na‐ion storage. In this work, we report that the novel layered perovskite Bi2TiO4F2@reduced graphene oxides (BTOF@rGO) serves as a promising anode for Na‐ion storage in an ether‐based electrolyte, which exhibits much better electrochemical performance than in an ester‐based electrolyte. Interestingly, BTOF@rGO possesses a prominent specific capacity of 458.3–102 mAh g−1/0.02–1 A g−1 and a high initial coulombic efficiency (ICE) of 70.3%. Cross‐sectional morphology and depth profile surface chemistry indicate not only a denser reactive interfacial layer but also a superior solid electrolyte interface film containing a higher proportion of inorganic components, which accelerates Na+ migration and is an essential factor for the improvement of ICE and other electrochemical properties. Electrochemical tests and ex situ measurements demonstrate the triple hybridization Na‐ion storage mechanism of conversion, alloying, and intercalation for BTOF@rGO in the ether‐based electrolyte. Furthermore, the Na‐ion batteries assembled with the BTOF@rGO anode and the commercial Na3V2(PO4)2F3@C cathode exhibit remarkable energy densities and power densities. Overall, the work shows deep insights on developing advanced electrode materials for efficient Na‐ion storage. [ABSTRACT FROM AUTHOR]

Lithium‐ion batteries (LIBs) play a pivotal role in today's society, with widespread applications in portable electronics, electric vehicles, and smart grids. Commercial LIBs predominantly utilize graphite anodes due to their high energy density and cost‐effectiveness. Graphite anodes face challenges, however, in extreme safety‐demanding situations, such as airplanes and passenger ships. The lithiation of graphite can potentially form lithium dendrites at low temperatures, causing short circuits. Additionally, the dissolution of the solid‐electrolyte‐interphase on graphite surfaces at high temperatures can lead to intense reactions with the electrolyte, initiating thermal runaway. This review introduces two promising high‐safety anode materials, Li4Ti5O12 and TiNb2O7. Both materials exhibit low tendencies towards lithium dendrite formation and have high onset temperatures for reactions with the electrolyte, resulting in reduced heat generation and significantly lower probabilities of thermal runaway. Li4Ti5O12 and TiNb2O7 offer enhanced safety characteristics compared to graphite, making them suitable for applications with stringent safety requirements. This review provides a comprehensive overview of Li4Ti5O12 and TiNb2O7, focusing on their material properties and practical applicability. It aims to contribute to the understanding and development of high‐safety anode materials for advanced LIBs, addressing the challenges and opportunities associated with their implementation in real‐world applications. [ABSTRACT FROM AUTHOR]

Developing anode materials with high specific capacity and cycling stability is vital for improving thin‐film lithium‐ion batteries. Thin‐film zinc oxide (ZnO) holds promise due to its high specific capacity, but it suffers from volume changes and structural stress during cycling, leading to poor battery performance. In this research, we ingeniously combined polytetrafluoroethylene (PTFE) with ZnO using a radio frequency (RF) magnetron co‐sputtering method, ensuring a strong bond in the thin‐film composite electrode. PTFE effectively reduced stress on the active material and mitigated volume change effects during Li+ ion intercalation and deintercalation. The composite thin films are thoroughly characterized using advanced techniques such as X‐ray diffraction, scanning electron microscopy, and X‐ray photoelectron spectroscopy for investigating correlations between material properties and electrochemical behaviors. Notably, the ZnO/PTFE thin‐film electrode demonstrated an impressive specific capacity of 1305 mAh g−1 (=7116 mAh cm−3) at a 0.5C rate and a remarkable capacity retention of 82% from the 1st to the 100th cycle, surpassing the bare ZnO thin film (50%). This study provides valuable insights into using binders to stabilize active materials in thin‐film batteries, enhancing battery performance. [ABSTRACT FROM AUTHOR]

Zn metal anodes are usually subject to grave dendrite growth during platting/stripping, which dramatically curtails the lifespan of aqueous Zn‐ion batteries and capacitors. To address above problems, in our work, a novel phosphorus‐functionalized multichannel carbon interlayer was designed and covered on Zn anodes. The results demonstrated that the multichannel structure combined with the three‐dimensional meshy skeleton can provide more sufficient space for Zn deposition, thereby effectively inhibiting the growth of zinc dendrites. Meanwhile, theoretical calculations also confirmed that the P–C and P=O functional groups from phosphorus‐functionalized multichannel carbon interlayer have the decisive influence in reducing the zinc nucleation potential and depositing uniformly zinc. Concretely, the symmetrical battery assembled with phosphorus‐functionalized multichannel carbon interlayer‐covered Zn anodes possessed a long lifetime of 3300 h at 2 mA cm−2 with 1 mAh cm−2. Furthermore, the full cell with activated carbon cathodes exhibited a high specific capacity of 80.5 mAh g−1 and outstanding cycling stability without capacity decay after 15 000 cycles at a high current density of 5 A g−1. The superior electrochemical performance exceeded that of most reported papers. Consequently, our synthesized zincophilic interlayer with the unique structure has superior prospects for application in stabilizing zinc anodes and prolonging the lifespan of batteries. [ABSTRACT FROM AUTHOR]

The aim of this work was to verify the possibility of forming Ni-Fe and Co-Fe alloys via topotactic ion exchange exsolution in Fe-infiltrated (La,Sr,Ce)0.9(Ni,Ti)O3-δ or (La,Sr,Ce)0.9(Co,Ti)O3-δ ceramics. For this purpose, samples were synthesized using the Pechini method and then infiltrated with an iron nitrate solution. The reduction process in dry H2 forced the topotactic ion exchange exsolution, leading to the formation of additional round-shape structures on the surfaces of grains. EDS scans and XRD analysis confirmed the formation of bimetallic alloys, which suggests that these materials have great potential for further use as anode materials for Solid Oxide Fuel Cells (SOFCs). [ABSTRACT FROM AUTHOR]

This review examines the impact of various aqueous electrolytes on hydrogen absorption and self-corrosion in magnesium (Mg) anodes. The discussion integrates both historical and recent studies to explore the mechanisms behind self-corrosion and anomalous hydrogen evolution (HE) under conditions of the Negative Difference Effect (NDE) and Positive Difference Effect (PDE). The focus is on the formation and oxidation of magnesium hydride in regions of active dissolution under NDE conditions. In the case of PDE, anodic dissolution occurs through the passive MgO-Mg(OH)₂ film, which shields the metal from aqueous electrolytes, thereby reducing hydrogen absorption and abnormal HE. The NDE conditions showed delayed reduction activity at the surface, attributed to a hydride phase within the corrosion product layer. Hydride ions were quantified through their anodic oxidation in an alkaline electrolyte, measured by the electric charge passed. The review also considers the role of de-passivating halide ions, electrolyte acidity buffering, and the addition of ligands that form stable complexes with Mg2⁺ ions, on the rates of hydride formation, self-corrosion, and anodic dissolution of Mg. The study evaluates species that either inhibit or promote hydrogen absorption and self-corrosion. [ABSTRACT FROM AUTHOR]

Silicon is a promising anode material for high-performance lithium-ion batteries (LIBs), but its rapid capacity degradation has significantly hindered its large-scale application. In this study, we propose an in situ self-assembly polymerization method to fabricate a stable silicon-based anode by leveraging electrostatic self-assembly technology, in situ esterification, and amidation reactions. The incorporation of a cross-linked polymer, combined with the synergistic effects of electrostatic interactions between negatively charged MXene and positively charged silane-coupling-agent-modified silicon, offers a novel strategy for enhancing the electrochemical performance of LIBs. Notably, annealed electrodes with a 65 wt% nmSi-NH2/MXene ratio demonstrate outstanding electrochemical performance, achieving a capacity of 929.5 mAh g⁻¹ at a current density of 1 A g⁻¹ after 100 charge/discharge cycles. These findings suggest that the integration of cross-linked polymers and electrostatic self-assembly can significantly improve the intercalation and overall electrochemical performance of silicon anodes in lithium-ion batteries. [ABSTRACT FROM AUTHOR]

Cadmium-based coatings have long been used to protect high-strength steel in aerospace, but due to cadmium's toxic and carcinogenic nature, its use is increasingly restricted. Zinc–nickel coatings, containing 10–14 wt% Ni, offer superior corrosion resistance compared to pure zinc, making them a promising alternative. However, Zn–Ni coatings are prone to cracking, which can compromise their protection. This study investigates how different anode materials influence crack formation and coating properties during electrodeposition. Zinc and nickel anodes produced coatings with consistent thicknesses of 13–15 µm, while 1020 steel and stainless steel resulted in thicker coatings of up to 33 µm. Notably, coatings deposited with nickel anodes demonstrated strong adhesion and consistent interface quality. Zinc anodes achieved a high Ni content of about 13.5 wt%, whereas 1020 steel and stainless steel produced lower Ni content, around 7 wt%. Additionally, zinc and nickel anodes led to fewer defects and minimal porosity, in contrast to the higher porosity observed with 1020 steel and stainless steel anodes. Furthermore, zinc anodes maintained stable voltages (~0.5 V), contributing to more uniform coatings. In terms of corrosion resistance, zinc anodes exhibited a lower corrosion rate of 0.44 mm/year compared to 1.54 mm/year for nickel anodes. This study highlights the importance of anode selection in reducing cracking and optimizing Zn–Ni coatings, presenting them as a safer and more effective alternative to cadmium-based coatings. [ABSTRACT FROM AUTHOR]

Because current collectors (CCs), Binders (BDs), and conductive additives (CAs) in cathodes and anodes do not directly contribute to charging and discharging, they decrease the energy density of the battery. Improvement of battery energy density is essential for future batteries. If it were possible to pack electrode active materials into the empty space without using CCs, BDs, and CAs, the energy density of the battery would increase. Therefore, attempts to avoid using these materials in batteries are being investigated. In this review article, methods for manufacturing electrodes without using these materials, as well as the performance and durability of the electrodes, are summarized and discussed. After explaining the function and necessity of the CCs, BDs, and CAs, methods for manufacturing electrodes without using CCs, BDs, and CAs, as well as the performance and durability of the electrodes, were summarized and discussed. In addition to battery performance, the mechanical durability of the electrodes is also explained since not using CCs, BDs, and CAs will cause problems with the electrodes' mechanical durability. [ABSTRACT FROM AUTHOR]

The low ion transport is a major obstacle for low‐temperature (LT) sodium‐ion batteries (SIBs). Herein, a core‐shell structure of bismuth (Bi) nanospheres coated with carbon (Bi@C) is constructed by utilizing a novel Bi‐based complex (1,4,5,8‐naphthalenetetracarboxylic dianhydride as the ligand) as the precursor, which provides an effective template to fabricate Bi‐based anodes. At −40°C, the Bi@C anode achieves a high capacity, which is equivalent to 96% of that at 25°C, benefitting from the core‐shell nanostructured engineering and Na+‐ether‐solvent cointercalation process. The special Na+‐diglyme cointercalation behavior may effectively reduce the activation energy and accelerate the Na+ diffusion kinetics, enabling the excellent low‐temperature performance of the Bi@C electrode. As expected, the fabricated Na3V2(PO4)3//Bi@C full‐cell delivers impressive rechargeability in the ether‐based electrolyte at −40°C. Density functional theory calculations and electrochemical tests also reveal the fast reaction kinetic mechanism at LT, thanks to a much lower diffusion energy barrier (167 meV) and a lower reaction activation energy (32.2 kJ mol−1) of Bi@C anode in comparison with that of bulk Bi. This work provides a rational design of Bi‐based electrodes for rechargeable SIBs under extreme conditions. [ABSTRACT FROM AUTHOR]

Herein, the graphene nanoplatelets (GNPs) anode is prepared using a facile, chemical‐free, and scalable approach that combines probe sonication and microwave treatment in an argon condition. The resulting GNPs exhibit a significant number of structural defects (ID/IG: 0.262), which provide abundant active sites to store lithium ions and offer sufficient pathways for the quick transfer of lithium ions and electrons. In lithium‐ion batteries (LIBs), the GNPs anode exhibits an outstanding electrochemical performance, achieving a high reversible 414 mAh g−1 capacity at the high current density of 1 A g−1 after 350 cycles. The anode maintains desirable capacities of 167 and 150 mAh g−1 even at elevated current densities of 4 and 5 A g−1, respectively. Importantly, it exhibits remarkable cycling performance with more than 100% of the initial reversible capacity retention after 350 cycles. The outcomes show noticeably enhanced performance characteristics, suggesting the potential for developing microwave‐treated graphene anode for long‐lasting and high‐performance LIBs. [ABSTRACT FROM AUTHOR]

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[Display omitted] Significant advancements have been made in electric vehicles and consumer devices. However, lithium-ion batteries with commercial graphite anodes still face challenges owing to their sluggish lithium-ion kinetics, low lithiation potential, and limited cycle stability. Consequently, there is a considerable research interest in developing new anode materials with rich resources, "zero-strain" characteristics for long-term cycling, and outstanding electrochemical properties. In this study, we thoroughly examine the relationship between the structure and electrochemical characteristics of λ and β phases of titanium pentoxides (Ti 3 O 5). The findings indicate that the β phase of Ti 3 O 5 exhibits a overall electrochemical performance compared to the λ phase. Moreover, β-Ti 3 O 5 electrodes deliver a low, yet safe average operating potential of 0.82 V versus Li/Li+ and a reversible specific capacity of 181.9 mA h/g at 0.1 A/g, thereby significantly outperforming λ-Ti 3 O 5 electrodes, with a value of only 55.7 mA h/g. The performance difference can be primarily attributed to the changes in the crystal structure, with the β phase exhibiting a lower energy barrier for lithium-ion diffusion than the λ-phase. Moreover, the β-Ti 3 O 5 electrodes exhibit an good rate performance (capacity retention of 49.5 % at 10 A/g) and good cycling stability (absence of capacity degradation after 2000 cycles at 1.0 A g−1). These advantages suggest that β-Ti 3 O 5 is a promising anode material for reliable, rapid-charging, and secure lithium-ion storage. [ABSTRACT FROM AUTHOR]

[Display omitted] • The nanotube structure enhances cyclic stability. • The Fe/Sn heterojunction boosts electronic conductivity. • The challenge of Sn element volume expansion is effectively mitigated. Transition metal sulfides have emerged as compelling anode materials for sodium-ion batteries (SIBs), leveraging their abundant elemental reserves and high theoretical capacities. However, the reaction of sulfur with Na ions is usually accompanied by significant volume dilation, which hinders their further development and application. Hence, constructing bimetallic sulfide (FeSn)/S for SIBs anode material greatly alleviates the circulation attenuation caused by volume expansion. Through constructing bimetallic heterojunction materials from nanocube precursors, the (FeSn)/S anode material retains a high specific capacity of 578 mAh/g at an intense current density of 2 A/g after 1000 cycles, and exhibits an great rate capability, delivering 796 mAh/g at 100 mA/g. The excellent electrochemical performance of the heterojunction material presents a promising solution to the enduring quest for enhanced anode material for SIBs. [ABSTRACT FROM AUTHOR]

[Display omitted] Considering the desired energy density, safety and cost-effectiveness, rechargeable zinc-ion batteries (ZIBs) are regarded as one of the most promising energy storage units in next-generation energy systems. Nonetheless, the service life of the current ZIBs is significantly limited by rampant dendrite growth and severe parasitic reactions occurring on the anode side. To overcome these issues caused by poor interfacial ionic conduction and water erosion, we have developed a facile strategy to fabricate a uniform zinc borate layer at the zinc anode/electrolyte interface (ZnBO). Such protective layer integrates superhydrophobic-zincopholic properties, which can effectively eliminate the direct contact of water molecules on the anode, and homogenize the interfacial ionic transfer, thereby enhancing the cyclic stability of the zinc plating/stripping. As a result, the as-prepared ZnBO-coated anode exhibits extended lifespan of 1200 h at 1 mA cm−2 and demonstrates remarkable durability of 570 h at 20 mA cm−2 in Zn||Zn symmetric cells. Additionally, when coupled to an NH 4 V 4 O 10 (NVO) cathode, it also delivers a superior cyclability (203.5 mAh/g after 2000 cycles at 5 A/g, 89.3 % capacity retention) in coin full cells and a feasible capacity of 2.5 mAh at 1 A/g after 200 cycles in pouch full cells. This work offers a unique perspective on integrating hydrophobicity and zincophilicity at the anode/electrolyte interface through an artificial layer, thereby enhancing the cycle lifespan of ZIBs. [ABSTRACT FROM AUTHOR]

Schematic of Zn2+ deposition behavior on the Zn anode and Zn@ZIF-N anode. [Display omitted] • The zeolitic imidazole framework (ZIF-N) with electron-withdrawing nitro groups exhibits zincophilicity and hydrophilicity. • The Zn@ZIF-N anode exhibits a lower polarization ratio and extended cycle life. • The full battery achieves a cycle life of 1600 cycles. Aqueous zinc-ion batteries (AZIBs) have garnered attention from researchers for their high theoretical capacity, safety, and low cost. However, the uncontrolled growth of zinc (Zn) dendrites and spontaneous corrosion reactions on the Zn anode significantly compromise the cycle life of AZIBs. This paper proposes the utilization of a novel zeolitic imidazole framework (ZIF-N) material with zincophilicity and hydrophilicity for modifying the Zn anode of AZIBs. ZIF-N incorporates numerous electron-withdrawing nitro groups at the Zn/ZIF-N interface to regulate the uneven electron distribution on the Zn anode. The modified Zn anode (Zn@ZIF-N) exhibits a lower polarization ratio (32.18 mV at 4 mA cm−2) and an extended cycle life (over 700 h at 4 mA cm−2). At a current density of 1 mA cm−2, the battery composed of a Zn@ZIF-N anode and NVO (NaV 3 O 8) achieves a cycle life of 1600 cycles. This work provides a straightforward and cost-effective strategy for modifying the Zn anode to prolong the cycle life of AZIBs. [ABSTRACT FROM AUTHOR]

[Display omitted] • A confined Mo 2 C/MoC heterojunction nanocrystal-graphene superstructure anode was proposed. • A unique glucose-induced heterogeneous nucleation method was presented. • The electrochemical reaction mechanism in superstructure anodes was revealed. Heterostructure design and integration with conductive materials play a crucial role in enhancing the conversion kinetics of electrode materials for metal-ion batteries. However, integrating nanocrystal heterojunctions into a conductive layer to form a superstructure is a significant challenge, mainly due to the difficulty in maintaining the structural integrity. Here we report a unique glucose-induced heterogeneous nucleation method that enables the independent manipulation of nucleation and growth of Mo 2 C/MoC heterojunction nanocrystals within 2D layers. Our investigations reveal that the rGO-Mo 2 C/MoC-rGO superstructure is formed by a topological transformation induced by subsequent heat treatment of the initial hydrothermally prepared rGO-MoO 2 -rGO precursor. This novel structure embeds Mo 2 C/MoC heterojunction nanocrystals within a 2D graphene matrix, providing enhanced mechanical stability, accelerated Na+ transport, and improved electron conduction. Ex situ XRD and Raman spectroscopy analyses reveal that the rGO-Mo 2 C/MoC-rGO superstructure significantly enhances the stability and reversibility of anodes. Leveraging these unique characteristics, the newly developed superstructural anode exhibits remarkable long-term cycling stability and outstanding rate performance. As a result, superstructure anodes demonstrate superior electrochemical capabilities, delivering a specific capacity of 106 mAh/g after enduring 5000 cycles at 1 A/g. Our study underscores the critical importance of superstructure design in propelling the advancement of battery materials. [ABSTRACT FROM AUTHOR]

In-situ construction of zinc polyacrylate (ZPAA) interphase on Zn anode tunes the interfacial electric field and permits rapid Zn-ion transport for facilitating uniform Zn deposition due to superior zincophilicity and inherent ion-diffusion channel, thus achieving an excellent Zn plating/stripping cycling stability. [Display omitted] The irreversibility and low utilization of Zn anode stemming from the corrosion and dendrite growth have largely limited the commercialization of aqueous zinc batteries. Here, a carbonyl-rich polymer interphase of zinc polyacrylate (ZPAA) is spontaneously in-situ constructed on Zn anode to address the above-mentioned dilemmas. The ZPAA interlayer enables fast transport kinetics of Zn2+ and tailors the interfacial electric field for realizing the uniform Zn deposition due to superior zincophilicity, high Zn2+ transference number and inherent ion-diffusion channel. Importantly, acting as a buffer interphase with strong adhesion and isolation of electrolytes, this functional layer effectively protects the Zn electrode against the water-induced erosion and passivation. Remarkably, the ZPAA@Zn electrode realizes an enhanced Coulombic efficiency of 99.71 % within 2200 cycles, delivers an ultra-long cycling stability over 7660 h (>319 days, 1 mA cm−2) and 2460 h (5 mA cm−2) with lower voltage hysteresis. Also, the ZPAA@Zn/MnO 2 full cell maintains a high capacity of 114 mAh/g after 2000 cycles, much better that of untreated Zn/MnO 2 cell (25 mAh/g). This concept of in-situ fabricating ion-sieve-like polymer interphase provides a facile approach to stabilize Zn anode and further paves a way for high-performance aqueous batteries. [ABSTRACT FROM AUTHOR]

A novel strategy to extend the service life of aqueous Zn-ion batteries has been proposed via dissolving the main by-products to reanimate dead Zn. This elimination strategy can not only timely remove the by-products on the Zn anodes to remain the high reversibility, but also light a new route to recycle the waste batteries. [Display omitted] • A reactivation strategy is proposed to significantly improve the durability of aqueous Zn-ion batteries. • The action mechanism has been systematically demonstrated via theoretical simulation and experimental study. • The ultra-high cumulative capacity (10,600 mAh cm−2) of Zn||Zn symmetric cell at 40 mA cm−2 has been achieved. • The waste Zn||Zn symmetric cells and Zn||LiFePO 4 full cells can be successfully rehabilitated to extend service life. The heavy by-products generated on Zn anode surface decrease the active surface of Zn anodes and thus induce uneven Zn deposition, seriously reducing the service life of aqueous Zn-ion batteries (AZIBs). Herein, we propose an elimination strategy enabled by the coordination chemistry to dissolve the main by-products (Zn 4 SO 4 (OH) 6 ·xH 2 O). Urea as a proof-of-concept has been applied as the reactivator in the electrolyte to catalytically produce highly active NH 3 on the surface of the by-products. Then the NH 3 can powerfully coordinate with the Zn2+ ion in the by-products to form the soluble complex [Zn(NH 3) 4 ]2+. Consequently, the proposed electrolyte can not only lead to the timely decomposition of the by-products to prevent the Zn anode from inactivation during cycling, but also repair the waste Zn anodes for reutilization. The action mechanism has been systematically demonstrated via theoretical simulation and experimental study. As a result, the high durability with ultrahigh cumulative capacity of 10,600 mAh cm−2 for the Zn||Zn symmetric cell has been achieved at 40 mA cm−2. Particularly, the dead Zn||Zn symmetric cells and Zn||LiFePO 4 full cells have been successfully reactivated. This study lights a new route to extend the cell lifespan and reuse waste Zn-ion batteries. [ABSTRACT FROM AUTHOR]

[Display omitted] • A novel embedded KVO 3 /NC anode is developed with 3 Li+ insertion/extraction mechanism. • A series of in-/ex-situ characterizations and DFT calculations clarify the reaction mechanism and structure–activity relationship. • KVO 3 /NC anode can deliver unparalleled electrochemical performances in both half- and full-cells. Vanadium-based metallic salts, characterized by their intrinsic low electronic conductivity, are impeding their advancement as anode materials in the realm of lithium-ion battery technology. This study presents a novel embedded anode material KVO 3 /NC (KVO/NC) synthesized via a sol–gel method, with KVO 3 (KVO) particles in situ growing on N-doped carbon, thereby ameliorating conductivity and electrochemical performance. The findings reveal that KVO/NC composite has three lithium-ion storage sites, ultra-high cycling stability (289 mA h/g@5000 cycles@10 C@100 %), and superior rate performance (249 mA h/g@15 C; 221 mA h/g@20 C). Coupled with LiFePO 4 cathode, it achieves a competitive energy density (391 W h kg−1@0.1 C; 1–3.9 V). This work reveals the practical potential of KVO/NC as a new type of lithium-ion battery anode material with high energy density and long cycle life through a series of ex situ/in situ characterizations. [ABSTRACT FROM AUTHOR]

Concurrent construction of robust SEI and CEI enriched with pyrrole/Ppy-analogues to achieve dendrite-free Zn anodes and enhance cathode capacity and stability towards advanced aqueous zinc-ion batteries. [Display omitted] • The pyrrole-based solid electrolyte interphase (SEI) guides uniform Zn2+ deposition and suppresses HER and side reactions. • A dendrite-free zinc anode is achieved with a prolonged cycle life of over 6000 h in Zn//Zn cell at 0.5 mA/cm2. • The cathode electrolyte interphase (CEI) comprising polypyrrole analogues achieves enhanced cathode capacity and stability for both PANI and MnO 2. The advancement of aqueous zinc-ion batteries (AZIBs) is impeded by challenges encompassing cathodic and anodic aspects, such as limited capacity and dendrite formation, constraining their broader utilization. Herein, pyrrole, an economically viable and readily accessible compound, is proposed as a versatile electrolyte additive to address these challenges. Experiments and DFT calculations reveal that pyrrole and its derivatives preferentially adsorb onto zinc foil, facilitating the formation of a pyrrole-based solid electrolyte interphase (SEI), which effectively guides uniform Zn2+ deposition through strong attraction force and suppresses hydrogen evolution reactions and parasitic reactions. On the cathode side, the additive promotes the formation of a durable cathode electrolyte interphase (CEI) enriched with poly-pyrrole (Ppy) analogues. Such layer significantly contributes to extra capacity of both polyaniline (PANI) and MnO 2 cathodes by leveraging the electrochemical reactivity of Ppy towards Zn2+ and improves their cyclic stability. Consequently, a dendrite-free Zn anode is realized with an extended cyclic lifespan surpassing 6000 h in Zn//Zn cell, coupled with an average Coulombic efficiency of 99.7 % in Cu//Zn cell. Moreover, the PANI//Zn and MnO 2 //Zn full cells demonstrate enhanced capacities along with improved cycling stability. This work provides a new additive strategy towards concurrent stabilization of cathode and Zn anode in AZIBs. [ABSTRACT FROM AUTHOR]

[Display omitted] Spinel Li 4 Ti 5 O 12 (LTO), a zero-strain material, is a promising anode material for solid-state thin-film lithium-ion batteries (TFB). However, the preparation of high-performance Li 4 Ti 5 O 12 thin-film electrodes through facile methods remains a significant challenge. Herein, we present a novel approach to prepare a binder- and conductor-free porous Li 4 Ti 5 O 12 (P-LTO) thin-film. This approach polyvinyl alcohol (PVA)-assisted spray deposition and does not require the use of complex or expensive methods. Adding PVA to the precursor solution effectively prevents thin-film cracking during high-temperature annealing, enhances adhesion, and forms a highly interconnected porous structure. This unique structure shortens the lithium-ion diffusion pathways and facilitates electron transport. Therefore, P-LTO thin film electrodes demonstrate exceptional rate capacity of 104.1 mAh/g at a current density of 100C. In addition, the electrodes exhibit ultra-long cycle stability, retaining 80.9 % capacity after 10,000 cycles at 10C. This work offers a novel approach for the preparation of high-performance thin-film electrodes for TFBs. [ABSTRACT FROM AUTHOR]

High-power pulse generators are widely used in civil and military fields. The main switch directly determines the output characteristics of the high-power pulse generators, such as the voltage front time (t f). Pseudospark switches (PSS) show a promising future for middle voltage, high repetitive frequency pulse power applications. However, how to further improve the breakdown behavior without reducing its advantages is a challenging task. In this paper, the influence of operating parameters (anode voltage U A and gas pressure p) and structural parameter (number of cathode holes) on the breakdown behavior are investigated, the related mechanism are explained, and specific improvement schemes are proposed. It is found that the t f of the single channel PSS (SCPSS) decreased significantly with increasing p, but hardly varied with U A under moderate p. However, it is not a sound solution to increase the p excessively to reduce t f. Besides, increasing the number of cathode holes can obtain a shorter t f at low pressures (which implies superior repetition frequency performance). However, at 25 Pa, the jitter (which is defined as the standard deviation of t f in multiple tests) of the 2-channel PSS is larger than that of the SCPSS. And the jitter of the 4-channel and 8-channel PSS is also greater than 6 ns and 2 ns, respectively. Through experimental and simulation analyses, it can be explained as the stepwise penetration of the virtual anode and the non-simultaneous ignition of the channels. A scheme to increase the trigger energy (ϵ) has been adopted to improve the simultaneous ignition probability, while shortening t f and reducing jitter. After optimization, the good ignition probability of the 4-channel PSS has been improved to 82% and the jitter has been reduced to less than 1 ns at 25 Pa and 14.7 mJ. [ABSTRACT FROM AUTHOR]

In recent years, glass anodes have been widely studied. However, self‐crystallization often occurs during glass preparation, which leads to a reduction in the cycle stability of the glass anode. In this work, SnO–P2O5–MnO2 glass anode materials were prepared using the melt‐quenching method. By increasing the concentration of MnO2, the specific capacity (after 800 cycles) of the glass anode was increased by 62%, from 234.9 to 381.3 mAh g−1. The result indicates that the introduction of MnO2 makes the glass structure more compact and suppresses the glass's ability of self‐crystallization, which is beneficial for the long‐cycle performance of lithium‐ion batteries. In addition, with the introduction of MnO2 in glass, manganese–tin synergistic discharge disperses the internal stress during the alloying process, which further enhances the cycling stability of the glass anode. This research is to propose a new reference for improving the cycle life and specific capacity of glass anode materials. [ABSTRACT FROM AUTHOR]

Transition metal oxide (TMO) anodes show inferior sodium ion storage performance compared with that of lithium ion storage owing to the larger radium size and heavier elemental mass of Na+ than Li+. Effective strategies are highly desired to improve the Na+ storage performance of TMOs for applications. In this work, using ZnFe2O4@xC nanocomposites as model materials for investigation, we found that by manipulating the particle sizes of the inner TMOs core and the features of outer carbon coating, the Na+ storage performance can be significantly improved. The ZnFe2O4@1C with a diameter of the inner ZnFe2O4 core of around 200 nm coated by a thin carbon layer of around 3 nm shows a specific capacity of only 120 mA h g−1. The ZnFe2O4@6.5C with a diameter of the inner ZnFe2O4 core of around 110 nm embedding in a porous interconnected carbon matrix displays a significantly improved specific capacity of 420 mA h g−1 at the same specific current. Furthermore, the latter shows an excellent cycling stability of 1000 cycles with a capacity retention of 90% of the initial 220 mA h g−1 specific capacity at 1.0 A g−1. TEM, electrochemical impedance spectroscopy, and kinetic analysis show that the inner ZnFe2O4 core with reduced particle size and the outer thicker and interconnected carbon matrix synergistically improve the active reaction sites, integrity, electric conductivity, and pseudocapacitive-controlled contribution of ZnFe2O4@xC nanocomposites, thus leading to an overall enhanced Na+ storage performance. Our findings create a universal, facile, and effective method to enhance the Na+ storage performance of the TMO@C nanomaterials. [ABSTRACT FROM AUTHOR]

The reduced surface porosity of highly compacted graphite anode after calendering is one of the major obstacles restraining the fast‐charging capability and low‐temperature adaptability of lithium‐ion batteries. In this work, through‐hole carbon spheres (THCS) synthesized by coaxial electrospinning and the following template sacrifice method are employed as a pore‐forming agent on graphite surfaces for the first time. The established gradient porosity architecture endows graphite anode with interconnected conductive networks and abundant Li+ transport channels. Therefore, the THCS pouch cell exhibits fast charging capability (charging efficiency of 49.2% at 5 C), superior cycling stability (96% capacity retention after 500 cycles at 1 C), and low‐temperature adaptability (high lithium plating resistance at −10 °C). By contrast, severe lithium‐plating behavior is observed in the blank pouch cell under the same testing conditions. It is believed that the facile and scalable gradient pore structure manufacturing technology will succeed in promoting the fast‐charging capability and low‐temperature adaptability of commercial Li‐ion batteries. [ABSTRACT FROM AUTHOR]

The design and construction of high-capacity covalent organic framework (COF) electrode materials and the study of energy storage mechanism are still facing challenges. COFs have received academic interest as electrode materials for lithium ion batteries (LIBs), while the exploitation of pristine COFs is restricted by insufficient conductivity and active sites, partly due to the lack of hierarchical pores. Herein, we report a flexible synthesis solution for the preparation of highly ordered two-dimensional nanoporous COFs. Triphenylene-based covalent organic frameworks (TP-COFs) have been successfully used as anode electrode materials for LIBs for the first time. Additionally, a systematic study has been conducted on the improvement of lithium storage performance of TP-COF anodes using different synthesis methods, with the aid of microwave ultrasonic coupling. The TP-COF prepared by microwave ultrasonic coupling (Mw-4@U) displays a cheese-shaped structure with a significant amount of enriched micropores. The charge–discharge profile of Mw-4@U demonstrates a remarkable reversible capacity of 1469.7 mA h g−1 after 120 cycles at the rate of 0.1 A g−1. [ABSTRACT FROM AUTHOR]

Here, we report a gold-furnished mesh as the current collector for Zn electrodeposition, which is used as the anode in aqueous zinc-ion batteries. The anode exhibits excellent cycling performance without obvious dendrite growth, and the full cell shows an outstanding specific capacity and long-term durability, surpassing those of bare Zn. [ABSTRACT FROM AUTHOR]

Lithium (Li) metal batteries have attracted great attention as next‐generation high‐energy‐density storage systems due to the high theoretical energy density and low redox potential of Li metal. However, the safety concerns and poor cycle life are hindering the commercialization of Li metal batteries. Combination of Li metal and current collectors to regulate Li plating/stripping behaviors is an effective strategy to address these issues. In this review, the recent advances in the current collectors for composite Li metal anodes are summarized, including construction interfacial protective layers on current collectors, fabrication and utilization of 3D current collectors, and improving the surface lithiophilicity for current collectors. Finally, perspectives of the current limitations and the future research directions are also presented. [ABSTRACT FROM AUTHOR]

The massive volume dilation, unsteady solid electrolyte interphase, and weak conductivity about Si have failed to bring it to practical applications, although its potential capacity is up to 4200 mAh g−1. For solving these problems, novel binary regulated silicon–carbon materials (Si/BPC) were done by a sol–gel procedure combined with single carbonization. Analytical techniques were systematically utilized to examine the effects of element doping at several gradients on morphology, structure and electrochemical properties of composites, thus the optimal content was identified. Si/BPC preserves a discharge specific capacity of 1021.6 mAh g−1 with a coulomb efficiency of 99.27% after 180 cycles at 1000 mA g−1, within the upgrade than single-doped and undoped. In rate test, it has a specific capacity of 1003.2 mAh g−1 at a high current density of 5000 mA g−1, quickly back towards 2838.6 mAh g−1 at 200 mA g−1. The inclusion of B and P elements is linked to the electrochemical characteristics. In the co-doped carbon layers, the synergistic impact of doping B and P accelerates the diffusion kinetics of lithium ions, boosts diffusion rate of Li+, offers low electrochemical impedance (45.75 Ω). This brings more defects to provide transport carriers and induces a substantial amount of electrochemically active sites, which fosters the storage of Li+, thus making silicon material electrochemically more active and potential. [ABSTRACT FROM AUTHOR]

The cycling performance of zinc‐ion batteries is greatly affected by dendrite formation and side reactions on zinc anode, particularly in scenarios involving high depth of discharge (DOD) and low negative/positive capacity (N/P) ratios in full cells. Herein, drawing upon principles of host–guest interaction chemistry, we investigate the impact of molecular structure of electrolyte additives, specifically the −COOH and −OH groups, on the zinc negative electrode through molecular design. Our findings reveal that molecules containing these groups exhibit strong adsorption onto zinc anode surfaces and chelate with Zn2+, forming a H2O‐poor inner Helmholtz plane. This effectively suppresses side reactions and promotes dendrite‐free zinc deposition of exposed (002) facets, enhancing stability and reversibility of an average coulombic efficiency of 99.89 % with the introduction of Lactobionic acid (LA) additive. Under harsh conditions of 92 % DOD, Zn//Zn cells exhibit stable cycling at challenging current densities of 15 mA ⋅ cm−2. Even at a low N/P ratio of 1.3, Zn//NH4V4O10 full cells with LA electrolyte exhibit high‐capacity retention of 73 % after 300 cycles, significantly surpassing that of the blank electrolyte. Moreover, in a conversion type Zn//Br static battery with a high areal capacity (~5 mAh ⋅ cm−2), LA electrolyte sustains an improved cycling stability of 700 cycles. [ABSTRACT FROM AUTHOR]

Covalent triazine frameworks (CTFs) are promising battery electrodes owing to their designable functional groups, tunable pore sizes, and exceptional stability. However, their practical use is limited because of the difficulty in establishing stable ion adsorption/desorption sites. In this study, a melt‐salt‐stripping process utilizing molten trichloro iron (FeCl3) is used to delaminate the layer‐stacked structure of fluorinated covalent triazine framework (FCTF) and generate iron‐based ion storage active sites. This process increases the interlayer spacing and uniformly deposits iron‐containing materials, enhancing electron and ion transport. The resultant melt‐FeCl3‐stripped FCTF (Fe@FCTF) shows excellent performance as a potassium ion battery with a high capacity of 447 mAh g−1 at 0.1 A g−1 and 257 mAh g−1 at 1.6 A g−1 and good cycling stability. Notably, molten‐salt stripping is also effective in improving the CTF's Na+ and Li+ storage properties. A stepwise reaction mechanism of K/Na/Li chelation with C═N functional groups is proposed and verified by in situ X‐ray diffraction testing (XRD), ex‐situ X‐ray photoelectron spectroscopy (XPS), and theoretical calculations, illustrating that pyrazines and iron coordination groups play the main roles in reacting with K+/Na+/Li+ cations. These results conclude that the Fe@FCTF is a suitable anode material for potassium‐ion batteries (PIBs), sodium‐ion batteries (SIBs), and lithium‐ion batteries (LIBs). [ABSTRACT FROM AUTHOR]

Addition of organic compounds containing O/N heteroatoms to aqueous electrolytes such as ZnSO4 (ZS) solutions is one of the effective strategies to inhibit Zn anode dendrites and side reactions. However, addressing the stability of Zn plating/stripping at high current densities and areal capacities by this method is still a challenge, especially in capacitors known for high power and long life. Herein, an organic heterocyclic compound of 1, 4, 7, 10‐tetraazacyclododecane (TC) containing four symmetrically distributed N atoms is employed as ZS additive, expanding the life of Zn anodes from ≈ 30 h to 1000 and 240 h at deep plating/stripping conditions of 10 and 20 mA cm−2/mAh cm−2, respectively; the cumulative capacity is as high as 5.0 Ah cm−2 with 99% Coulombic efficiency, far exceeding reported additives. TC with higher binding energies than H2O for Zn species tends to adsorb to Zn (002) in a lying manner and participate in the solvation shell of Zn2+, thus avoiding Zn dendrites and side‐reaction damage, especially at high current densities. The TC‐endowed Zn anode's stability under such extreme conditions is verified in Zn‐ion capacitors (i.e., > 94.6% capacity retention after 28 000 cycles), providing new insights into the development of high‐power Zn‐based energy storage devices. [ABSTRACT FROM AUTHOR]

Aqueous Zn metal batteries (ZMBs) are largely hampered by the poor stability of zinc (Zn) anode in aqueous electrolyte due to uncontrollable deposition behavior and parasitic reactions. Hence, a stable Glu@Zn anode via acid etching is developed that simultaneously exposes (002) plane and modifies exposed grain boundaries. The surface‐preferred (002) plane is achieved by minimizing its surface energy. And the exposed grain boundaries are also modified by decomposition products of acid etching, which can greatly reduce the adverse effects caused by highly active grain boundaries. These features favor Glu@Zn anode by accrediting a long‐term cycle lifespan exceeding 4400 h with a high average coulombic efficiency (CE) of 98.9%. Surprisingly, Glu@Zn anode can run for more than 250 h with 50% Zn utilization. The assembled Glu@Zn//NH4V4O10 full batteries deliver a specific capacity of 291.6 mAh g−1 after 400 cycles even at a low current density of 0.5 A g−1. It can also obtain a stable cycling performance up to 2000 cycles. To further verify its stability, a pouch cell is constructed that can preserve stable 400 cycles with 5 mAh. This study sheds light on surface energy regulation exposing preferred crystal plane to develop highly stable and reversible cycling aqueous ZMBs. [ABSTRACT FROM AUTHOR]

Zn‐ion batteries are fascinating owing to their inherent safety and high theoretical capacity. However, dendrite‐free growth is challenging, limiting highly stable plating for long‐life batteries. Herein, a new, conceptual ultra‐stable self‐converted scaffold (SCS) Zn anode is reported that enables dendrite‐free plating by guiding the deposition of Zn to specific areas. The SCS is naturally transformed from a zincophilic yet resistive nucleation seed. As a sufficient amount of Zn is plated onto these nucleation seeds, they undergo self‐conversion into a resistive scaffold, thereby losing their Zn affinity, and effectively directing the Zn plating toward the less resistive basal plane by repelling the electrons. The unique electrode demonstrates exceptional stability, effectively controlling dendrite‐free growth for thicknesses of up to 120 µm even in open‐plating environments with an impressive areal capacity of 60 mAh cm−2. Moreover, in full cell configuration, the SCS shows a superior long cycle‐life of 3000 cycles. The newly discovered dendrite‐free plating mechanism is also demonstrated. [ABSTRACT FROM AUTHOR]

Bismuth (Bi) has attracted widespread attention for sodium storage due to its high electronic/ionic conductivity, suitable reaction potential, and theoretical capacity (386 mAh g−1). However, Bi electrodes have a relatively high volumetric expansion ratio, which constrains their high capacity and affects the battery's cycle performance. Herein, a highly dispersed Bi atomic cluster is controllably prepared anchored on a porous TiO2 substrate through in situ segregation from Bi4Ti3O12 (TiO2/BiAC). The highly dispersed Bi clusters can serve as an “Ionic sponge” and accommodate more Na+ without causing excessive stress. Additionally, it aids in the decomposition of NaPF6, leading to the formation of a durable solid‐electrolyte interphase (SEI) layer rich in inorganic components. As expected, TiO2/BiAC exhibits excellent sodium storage performance in terms of cycling stability (346 mAh g−1 after 1000 cycles@ 1A g−1) and rate capability (231 mAh g−1 @ 100 A g−1). The pouch cell is further assembled and exhibits a specific capacity of 1.2 Ah after 200 cycles. This discovery presents a new method for developing efficient anode materials and is essential for steering the advancement of anode materials with fast charge–discharge capabilities. [ABSTRACT FROM AUTHOR]

In this study, we synthesized a novel electrode for electrocatalytic adsorption by fabricating ACF‐TiO2 via the sol‐gel method and binding it with IrO2‐TaO2. The electrode's effectiveness in treating oilfield produced water (OPW) was evaluated using batch techniques. Comprehensive characterization, including scanning electron microscopy (SEM), energy‐dispersive spectrometry (EDS), Brunauer‐Emmett‐Teller (BET) analysis, and Fourier‐transform infrared (FTIR) spectroscopy, confirmed uniform TiO2 loading onto the ACF surface, preserving structural integrity. BET analysis indicated increased mesopore volume and enhanced organic adsorption capacity without compromising microporous structure. Additionally, FTIR analysis revealed the emergence of functional groups conducive to adsorption and catalytic reactions. Freundlich isotherms and pseudo‐first‐order kinetics best fit the adsorption data. Remarkably, even after five cycles, the electrode maintained high removal efficiencies for chemical oxygen demand (COD) and oil content at 91.35 % and 91.12 %, respectively. We further investigated the complex phenomena of material adsorption, electrochemical oxidation, and desorption during electrocatalytic adsorption, highlighting the importance of solid‐phase adsorption and liquid‐phase electrocatalytic oxidative decomposition in OPW treatment. Comparison with similar electrodes and DSA electrodes demonstrated the superior performance and practicality of the IrO2‐TaO2‐ACF(TiO2) electrode. Its cost‐effectiveness and regeneration method further enhance its applicability in real‐world scenarios, emphasizing its potential in water treatment. [ABSTRACT FROM AUTHOR]

To recharge lithium‐ion batteries quickly and safely while avoiding capacity loss and safety risks, a novel electrode design that minimizes cell polarization at a higher current is highly desired. This work presents a dual‐layer electrode (DLE) technology via sequential coating of two different anode materials to minimize the overall electrode resistance upon fast charging. Electrochemical impedance spectroscopy and distribution of relaxation times analysis revealed the dynamic evolution of electrode impedances in synthetic graphite (SG) upon a change in the state of charge (SOC), whereas the natural graphite (NG) maintains its original impedance regardless of SOC variation. This disparity dictates the sequence of the NG and SG coating layers within the DLE, considering the temporal SOC gradient developed upon fast charging. Simulation and experimental results suggest that DLE positioning NG and SG on the top (second‐layer) and bottom (first‐layer), respectively, can effectively reduce the overall resistance at a 4 C‐rate (15‐min charging), demonstrating two times higher capacity retention (61.0%) over 200 cycles than its counterpart with reversal sequential coating, and is higher than single‐layer electrodes using NG or NG/SG binary mixtures. Hence, this study can guide the combinatorial sequence for multi‐layer coating of various active materials for a lower‐resistivity, thick‐electrode design. [ABSTRACT FROM AUTHOR]

Lithium (Li) metal is a promising next-generation anode material, but it suffers from dendrite growth and unstable solid electrolyte interphase (SEI). We developed a robust and continuous self-standing covalent organic framework (COF) membrane using a same-phase synthesis method and utilized the membrane as an artificial SEI. The membrane suppressed dendrite growth and enhanced the stability and longevity of Li metal anode cycling. [ABSTRACT FROM AUTHOR]

The plating/stripping behavior of Zn ions on the Zn anode, driven by an electric field, is a key process in determining the performance of aqueous zinc ion batteries (AZIBs). Process‐induced unevenness of commercial Zn foils results in poor reversibility of Zn anodes. Herein, a self‐healing dynamic anode/electrolyte interface is constructed by incorporating hydroxyl‐rich alcohols with high charge density and zincophilicity into the original electrolyte. These alcohols selectively anchor on electron‐poor sites in the charging state, inducing domain‐limited deposition of Zn2+ to achieve a dense, uniform, and flat deposition state. As a result, a durable Zn anode with excellent electrochemical reversibility can be realized in practical cycling (average Coulombic efficiency of 99.5%). Even under deep plating/stripping conditions (5 mA cm−2 and 5mAh cm−2), the modified electrolyte exhibits a remarkable repair effect on corroded Zn anodes that have been cycled in base electrolyte, extending the lifespan to over 1,020 h. This represents a 15.6‐fold enhancement in lifespan compared to recycling in the base electrolyte. This strategy for electrolyte additive directly influences the design of ultra‐long‐life AZIBs and provides concrete concepts for the recovery of zinc anodes. [ABSTRACT FROM AUTHOR]