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Hierarchical Bi2MoO6 nanosheet arrays (BNAs) growing on three-dimensional (3D) Ni foam are synthesized by one-step template-free route. The obtained BNAs are used as binder-free integrated electrode for Li-ion batteries (LIBs) directly. The electrode exhibits a super high reversible discharge capacity of 2311.7μAh⋅cm−2 (1741.4mAhg−1), and an excellent cycle stability. The outstanding electrochemical properties are reasonable from the self-supported integrated electrode in which the electrolyte is easy to infiltrate active materials, electrons and ions are readily transported along the 3D conductive substrate and the stable electrode structure. Hierarchical Bi2MoO6 nanosheet array integrated electrodes are successfully prepared by a facile, environmental friendliness and very effective strategy. When evaluated as anode electrode for LIBs, high capacities (2311.7 μAh⋅cm–2∼1741.4mAh⋅g–1) as well as superior long cycle life (550 times) are achieved. [ABSTRACT FROM AUTHOR]

Integrated SnO2 electrode with hierarchical nanosheets array structure growing on three-dimensional (3D) macroporous Ni foam substrates is successfully prepared via a facile and effective template-free route. The self-supported integrated electrode can be directly used as anode for lithium-ion batteries (LIBs) without adding any ancillary materials. As a result, such integrated electrode exhibits superior electrochemical performances. It maintains a high reversible discharge capacity of 1617.8mAhg and a high cycling stability of 829.2mAhg even after 500 cycles. The unique structural features with large areas, shorter transport path of ion and electron as well as robust mechanical strength are probably responsible for the enhanced performance. Hierarchical binder-free SnO2 nanosheet array integrated electrodes are successfully prepared by a facile, safety, and environmental friendliness, yet very effective strategy. When evaluated as anode electrode for LIBs, high capacities as well as superior long cycle life are achieved. It is the best performance of pure SnO2 nanoarray integrated electrodes in LIBs. [ABSTRACT FROM AUTHOR]

FeO is an attractive conversion reaction-based anode material with high theoretical capacity (928 mA h g). However, the poor cycling and rate performance hinder its applications in Li-ion batteries. In this work, we report an effective strategy to synthesize three-dimensionally macroporous graphene-supported FeO hybrid composite. Benefiting from advantage of the special structure, the hybrid composite exhibits excellent Li storage performance, delivering a high reversible capacity of 980 mA h g at the current density of 4 A g even after 470 cycles and ultrahigh rate capability (293 mA h g even at current density of 20 A g). [ABSTRACT FROM AUTHOR]

Organic tailored materials using various aromatic carbonyl derivative polyimides are synthesized by tuning the alteration of the conjugated backbone. These materials are used as the cathodes for high‐power, long‐cycle, and sustainable sodium‐organic batteries. [ABSTRACT FROM AUTHOR]

GeO2 is a promising high-performance anode material for Li-ion batteries (LIBs) because of its high theoretical reversible capacity, low operation voltage, and high thermal stability. Herein, a simple, cheap, and easily scaled-up synthetic procedure for preparing ultrathin GeO2-reduced graphene oxide (RGO) sheets is proposed and realized through a freeze-drying method. The as-prepared GeO2-RGO show non-aggregated graphene sheets and homogeneously dispersed GeO2 nanoparticles. As a high-performance anode material for LIBs, the composite shows a high specific capacity (1200 mAh g−1 at current density of 100 mA g−1), good cycling performance, and rate capability. [ABSTRACT FROM AUTHOR]

High reversible lithium storage capacity is obtained from novel SnO2/ZnWO4 core-shell nanorods. At C/20 (20 h per half cycle) rate, the reversible capacity of SnO2/ZnWO4 core-shell nanorods is as high as 1000 mAh g−1, much higher than that of pure ZnWO4, SnO2, or the traditional theoretical result of the simple mixture. Such performance can be attributed to the synergistic effect between the nanostructured SnO2 and ZnWO4. The distinct electrochemical activity of ZnWO4 nanorods probably activates the irreversible capacity of the SnO2 nanoparticles. These results indicate that high-performance lithium ion batteries can be realized by introducing the synergistic effect of one-dimensional core-shell nanocomposites. [ABSTRACT FROM AUTHOR]

Extraordinarily high reversible capacity of lithium-ion battery anodes is realized from SnO2/α-MoO3core-shell nanobelts. The reversible capacity is much higher than traditional theoretical results. Such behavior is attributed to α-MoO3that makes extra Li2O reversibly convert to Li+. [ABSTRACT FROM AUTHOR]

Due to difficulties with scalability and practical utilization, Si/graphene composites are not yet used as anodes for commercially available lithium-ion batteries. In this paper, we report an accessible and cost-effective ball-milling route to synthesize Si and graphene composites. By introducing amino- and carboxyl-groups, covalent linkage between Si nanoparticles and graphene is created, which solves serious issues of hybrids like poor dispersion and weak connection. This composite features a unique structure, where Si nanoparticles are uniformly attached to the surface or embedded into the inter-layers of the graphene. When used as anodes of lithium-ion batteries, this composite can retain a reversible capacity of 1516.23 mAh g−1 after 100 cycles at 100 mA g−1. It also exhibited excellent ultra-long-term cycling stability and high rate performance. The electrochemical performance is superior to most reported Si/graphene composites without chemical bonds at the interface, which indicates that covalent bonding can effectively inhibit the irreversible sliding of Si nanoparticles. In addition, EIS measurement had revealed a lower transfer resistance and faster Li-ions diffusion of Si@APTES/ f -Gr, suggesting the integrity of graphene after functionalization. The proposed functionalization-assisted ball-milling approach, therefore, probably enables the large-scale production of Si/Graphene as anodes in high-performance batteries in the future. [Display omitted] [ABSTRACT FROM AUTHOR]

Abstract: FeWO4-SnO2 core-shell nanorods are assembled via a two-step method. SnO2 nanoparticles are uniformly coated on the surface of FeWO4 nanorods. And high lithium storage performance has been achieved from them. At C/10 rate (10hours per charging cycle), the reversible capacity (the 2nd cycle) of FeWO4-SnO2 core-shell nanorods is up to 1286.9 mAh g−1, much higher than that of FeWO4 nanorods, SnO2 and traditional theoretical results. Such behaviour is attributed to the synergistic effect between nanostructured SnO2 and FeWO4. Our results imply that core-shell nanocomposites are good candidates for high-capacity anodes of lithium ion battery. [Copyright &y& Elsevier]

A birnessite-type Na 1/3 MoO 2 •H 2 O with a large interlayer distance has been synthesized by solid-state reaction and water treatment for the first time. The obtained Na 1/3 MoO 2 •H 2 O is phase-pure and well-crystallized as determined by X-ray structure refinement and presents a typical plate-like microstructure. Surprisingly, the Na 1/3 MoO 2 •H 2 O can be used as both anode and cathode electrodes for Li-ion batteries (LIBs), which shows long cycle life ((anode, 500 cycles~650 mAh g−1), and high capacity of 300 mAh g−1 (cathode). This high performance is ascribed to the PF 6 − intercalation mechanism of Na 1/3 MoO 2 •H 2 O based on the density functional theory (DFT) calculations. This work offers an efficient way for the design of electrode materials and sheds light on the application of the Na 1/3 MoO 2 •H 2 O for high capacity dual-ion batteries (DIBs). [ABSTRACT FROM AUTHOR]