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NiSnO3 nanoparticles were synthesized via a facile hydrothermal technique as an anode material for lithium ion batteries (LIBs), The good reversible ability of NiSnO3 electrode is mainly attributed to the NiO, Sn and Li2O formed in the first discharge of the NiSnO3 electrode can act as buffer substrates for each other, which buffer the volume change of the NisnO3 electrode during the charge and discharge reaction. The diffusion coefficient of lithium ions in the process of charging and discharging of NiSnO3 nanomaterials was obtained by galvanostatic intermittent titration technique (GITT). It can be seen that NiSnO3 nanomaterials have a faster charging and discharging rate, which is mainly attributed to the higher specific surface area (94.40 m²/g) of NiSnO3 nanoparticles. At the same time, the smaller nanoparticle size (4-9 nm) helps to improve the contact area between the surface of the NiSnO3 electrode and the electrolyte, reducing the diffusion distance of lithium ions. Further exploration of the adsorption energy (-2.93 eV), electron density difference, intrinsic charge transfer (1.01 e), diffusion barrier (0.112 eV) and diffusion coefficient (1.73×10-4 cm²/s) of lithium ions on NiSnO3 surface were conducted using first principles. The results all indicate that there is a strong interaction between lithium ions and NiSnO3 surface, and a fast charging and discharging rate of NiSnO3 nanomaterials. This article demonstrates that NiSnO3 has the potential to serve as a promising anode material for LIBs from both experimental and theoretical perspectives. [ABSTRACT FROM AUTHOR]

Two types of tubular and disc-shaped natural diatomite were used as the initial raw materials to prepare a series of diatomite derived silicon carbon anode materials. The crystal structure, microstructure, and chemical composition of the prepared products were systematically characterized using testing methods such as X-ray diffraction (XRD), Raman spectros-copy (Raman), scanning electron microscope (SEM), transmission electron microscope (TEM), and X-ray photoelectron spectroscopy (XPS), etc. The prepared diatomite derived silicon carbon anode materials were assembled as active substances to assemble lithium ion batteries. The effects of tubular and disc-shaped morphologies on its lithium storage performance were compared, and the effect of the amount of asphalt derived carbon coating on the specific capacity and cycling stability of the silicon carbon anode materials was investigated in detail. The test results show that both products tube DE-1 3 and tube DE-1: 6 have high capacity retention at a low current density of 0.2 Ag¹, after 500 cycles, the specific capacity -1 can be maintained at 443 mAh g¹ and 414 mAh g¹, respectively. While product tube DE-1: 6 has better structure stability at a higher current density of 0.5 Ag. [ABSTRACT FROM AUTHOR]

In order to solve the problem of low efficiency of traditional balanced electric topology, a two-level balanced topology is proposed. This balancing topology divides the battery pack into two forms: Intra-group and inter-group. Buck-Boost equalization circuit is used in the group, and reconfigurable equalization circuit is used between the groups. The intra-group and inter-group can be equalized at the same time, which improves the equalization efficiency. Taking SOC(State of Charge) as the equalization variable, the intra-group equalization algorithm adopts the fuzzy logic control strategy based on SOC to reduce the equalization time and improve the equalization efficiency. MATLAB/Simulink software is used to model and simulate the circuit topology and the results are compared with the traditional Buck-Boost circuit. The simulation results show that compared with the traditional Buck-Boost circuit, the proposed algorithm and equalization topology reduce the equalization time by about 28% under the charge-discharge state, indicating that the equalization circuit and algorithm have good performance. [ABSTRACT FROM AUTHOR]

BackgroundUnder the guidance of achieving carbon peaking and carbon neutrality goals, the demand for lithium-ion batteries has increased significantly. However, during the production, use, and maintenance of lithium-ion batteries, workers are inevitably exposed to various occupational hazards, and some chemicals are nephrotoxic. ObjectiveTo evaluate the kidney function and potential determinants among male workers in a lithium-ion battery-related enterprise in Shanghai. MethodsThe data of occupational health examination carried out by an occupational disease prevention and control institution for workers in a lithium-ion battery-related enterprise in Shanghai were collected. The workers participating pre-employment occupational health examination were treated as a control group, and the other group was recruited from those participating periodic health examination. Serum creatinine, urea nitrogen, uric acid, and renal ultrasound were used to assess the kidney function of workers. Kidney function was classified according to the reference range of kidney function indicators in Diagnostics (9th Edition, national planning textbook for high education in medicine). Binary logistic regression and generalized linear regression were used to identify potential determinants of abnormal values in kidney function indicators in workers. ResultsThere were 6184 workers in the control group (pre-employment) with a mean age of (27.40±4.50) years. There were 3526 workers on the job with a mean age of (29.40±4.99) years and the median time of service was 2.00 (1.00, 3.42) years. The prevalence rates of high serum creatinine, high urea nitrogen, and high uric acid, and abnormal kidney ultrasound among the control group were 0.66%, 2.47%, 30.32%, and 10.12%, respectively; the indicators in the on-the-job workers were 0.96%, 3.35%, 38.25%, and 12.68%, respectively, significantly higher than those in the control group (P1-3 years, OR=1.747, 95%CI: 1.494, 2.042; >3 years, OR=1.866, 95%CI: 1.511, 2.304), hypertension (OR=1.400, 95%CI: 1.055, 1.859), and hyperglycemia (OR=1.565, 95%CI: 1.221, 2.006). Workers who were older (OR=1.038, 95%CI: 1.022, 1.054) and had longer working years (>1-3 years, OR=1.518, 95%CI: 1.201, 1.920), occasional smoking habits (OR=1.239, 95%CI: 1.039, 1.478), regular drinking habits (OR=1.875, 95%CI: 1.139, 3.087), and hypertension (OR=1.465, 95%CI: 1.075, 1.998) were at a higher risk of renal ultrasound abnormalities. The generalized linear models showed that length of service (>1-3 years, β=1.120, 95%CI: 0.360, 1.880; >3 years, β=1.451, 95%CI: 0.543, 2.358), smoking status (occasional, β=0.818, 95%CI: 0.156, 1.479; regular, β=0.841, 95%CI: 0.066, 1.616), and hypertension (β=2.742, 95%CI: 1.390, 4.094) were the influencing factors of serum creatinine concentration in the workers. Age (β=0.014, 95%CI: 0.009, 0.019) and length of service (>1-3 years, β=0.079, 95%CI: 0.012, 0.146) were the influencing factors of urea nitrogen. Age (β=−1.759, 95%CI: −2.288, −1.231), length of service (≤1 year, β=10.676, 95%CI: 4.035, 17.316; >1-3 years, β=26.117, 95%CI: 19.962, 32.272; >3 years, β=34.558, 95%CI: 26.116, 43.001), hypertension (β=23.162, 95%CI: 11.617, 34.707), and hyperglycemia (β=15.017, 95%CI: 4.853, 25.180) were the influencing factors of uric acid. ConclusionThe prevalence of abnormal kidney function of workers in selected lithium-ion battery-related enterprise is varied by age, length of service, smoking status, drinking status, hypertension, and hyperglycemia. There may be a trend that the longer the time working in a lithium-ion battery-related enterprise, the worse the workers' kidney function. Therefore, the enterprise should pay attention to the possible reasons for their changes and take targeted interventions.

Lithium batteries have the advantages of high energy density and long cycle life, and are widely used in electric vehicle power plants. However, the operating conditions of vehicles are complex and variable, and the battery exhibits highly nonlinear properties, making it difficult to accurately calculate the state of charge (SOC) of the battery. In order to optimize the SOC estimation accuracy of lithium batteries, a fractional second-order RC model combined with Warburg elements was constructed, and a adaptive genetic algorithm was used for parameter identification. Combining multi innovation theory and extended Kalman filter filter algorithm, an ion battery SOC estimation algorithm based on multi innovation extended Kalman filter (MIEKF) was proposed, and the effectiveness of this method was verified by experimental data, which provided a new approach and practical support for improving the SOC estimation accuracy and the cycle life of vehicle mounted lithium batteries [ABSTRACT FROM AUTHOR]

Using titanium tetrachloride as the raw material, TiCl4 was prepared into a 0.5mol/L aqueous solution in an ice water bath under weakly alkaline conditions. The precipitate was obtained by low-temperature hydrolysis, and the precipitate was dried in a vacuum oven at 80 °C and roasted at low temperature of 400 °C for 12 hours to obtain white powder. Structural characterization was carried out through X-ray diffraction (XRD). The morphology was characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The obtained sintered products were combined with metal lithium electrode materials and polyethylene separators to construct a semi battery system for battery performance testing. The results showed that titanium tetrachloride was used as the raw material to achieve slow hydrolysis under low temperature conditions, and then subjected to long-term low-temperature calcination to obtain a white powder of nanoscale rutile type TiO2, which has advantages such as small particle size, good dispersibility, narrow particle size distribution, and good sphericity. This product has a first discharge specific capacity of 169 mAh/g at 0.2 charge and discharge, and a discharge specific capacity of 69 mAh/g at 5 C, with a capacity retention rate of 91.69%, respectively. Its electrochemical performance is much higher than that of commercial TO2. Research has shown that the method of preparing TiO2, based on slow hydrolysis low-temperature sintering mechanism is a simple, low-cost, and suitable process for large-scale production. [ABSTRACT FROM AUTHOR]

Copyright of Mining & Metallurgy (10057854) is the property of Beijing Research Institute of Mining & Metallurgy Technology Group and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This is an article in the field of mineral materials. The effect of pitch softening point on the structure and electrochemical performance of pitch carbonized spherical crystalline graphite anode materials were systematically investigated. The results show that a layer of amorphous carbon is formed on the surface of graphite after carbonization of pitch, which improves the surface morphology of spherical crystalline graphite, but does not change its crystal structure; The composites with high pitch softening point have better electrochemical performance and cycling stability. After 280 cycles of temperature, the capacity of the composites is not significantly reduced after 30 cycles of charge discharge, and the capacity retention rate is 85.07%, which is 4.74% higher than that of the untreated ones.

Herein, we propose a comprehensive chemical experiment that include the preparation, characterization and lithium storage performance evaluation of mesoporous carbon-coated iron oxide nanoparticles. Students are guided to acquaint themselves with the characterization methods of material structure, the operation of battery assembly and battery testing technique. This experiment will disclose the interrelationship between material structure and performance to students, and cultivate their experiment skills, scientific literacy, and practical innovation ability. Furthermore, this experiment serves as a gateway for students to explore the frontier in new energy, and stimulate their scientific interest. Therefore, this experiment is recommended as a comprehensive chemical experiment course for senior undergraduates majoring in materials chemistry or applied chemistry. [ABSTRACT FROM AUTHOR]

Copyright of Multipurpose Utilization of Mineral Resources / Kuangchan Zonghe Liyong is the property of Multipurpose Utilization of Mineral Resources Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Considering that a personal car spends about 95% of its life in parking mode, calendar aging can have a significant impact on battery life. High temperature storage is a common method for rapid evaluation of battery calendar life. In order to obtain reliable results of high temperature accelerated aging test, it is necessary to study the aging mechanism of battery stored at different temperature conditions. In this paper, the calendar aging experiment of graphite-SiOx/NCM811 pouch cells were carried out within the temperature range of 25-55℃. The differential curve analysis and post-mortem analysis were used to explore the aging mechanism. The results show that the calendar aging of pouch cells is mainly caused by the loss of lithium inventory and the loss of cathode active materials. When cells store at higher temperature, the loss of lithium inventory and the loss of cathode active materials increase, while the loss of anode active materials remains relatively unchanged. Based on various test results, it can be inferred that the parasitic reactions on the surface of electrode lead to the loss of lithium inventory and the increase of SEI. With the increase of storage temperature, this side reaction continues and consumes more lithium inventory. It is worth mentioning that when storage at 55℃, the microcracking develops and even breaks some of the secondary particles of cathode materials. Therefore, the pouch cells suffer severe loss of cathode active materials, which makes it inappropriate to accelerate the aging of batteries at such high temperature.

According to the requirements of Al foil surface modification, the surface of Al foil is baked, corona and coated with carbon, and 6 Ah pouch type lithium iron batteries is made. The effects of surface modification methods on the performance of Al foil, electrode plate and battery are evaluated through the tests of Al foil surface roughness, electrode plate rolling adhesion, electrochemical impedance, storage, cycle, etc. The results show that the surface roughness of Al foil is increased by 41% after corona, and the adhesion of the electrode sheet is thus increased by 3.166 times as much as that of the base foil. After corona and carbon coating treatment, the impedance of the battery is reduced by one capacitance arc between the aluminum foil and the active substance. The alter-nating current resistance(ACR) of the battery is reduced to 5.59 mΩ, and the consistency of the internal resistance of the battery is improved. Corona and carbon coating can improve the high current discharge performance of the battery, reduce polarization, and improve the discharge platform, but carbon coating is more significant than corona. At the same time, the coated carbon significantly improves the high temperature cycle. [ABSTRACT FROM AUTHOR]

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Copyright of Journal of Electrochemistry is the property of Journal of Electrochemistry Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In order to develop lithium-ion batteries with high energy density, prelithium technology has attracted extensive attention. Li5FeO4was successfully prepared by molten salt method with LiNO3-LiOH mixed lithium salt as reaction medium and lithium source, and nano Fe2O3 as iron source in this work. Li5FeO4 as cathode prelithiation additive is applied to lithium-ion batteries. The synthesis conditions of Li5FeO4 were optimized by orthogonal experiment, and the effect of synthesis conditions on the electrochemical properties of the material was discussed. Li5FeO4 was added to the surface of LiFePO4 positive electrode and assembled with graphite negative electrode to form a full cell. Its effect on the electrochemical performance of the full cells and the mechanism of reducing the initial capacity loss of lithium-ion batteries were studied. The results show that Li5FeO4 cathode prelithiation additives with high purity, small particle size and outstanding electrochemical performance can be prepared by molten salt method. When Li5FeO4 with a mass fraction of 2.8%(based on the percentage of active materials mass) was added, the discharge specific capacity of first cycle for the LiFePO4/graphite full cell was 150 mAh·g-1 at 0.05 C, which was 8.5% higher than that without adding, after 100 cycles at 0.2 C. the capacity still increased by 7.1%, and the irreversible capacity of the svstem was restored.

Copyright of Journal of Materials Engineering / Cailiao Gongcheng is the property of Journal of Materials Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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Copyright of Inorganic Chemicals Industry is the property of Editorial Office of Inorganic Chemicals Industry and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

A new scheme of lithium ion battery and super capacitor hybrid energy storage system in wind farm was proposed. The original wind power was decomposed by the wavelet packet frequency division technology to obtain the compensation power of the hybrid energy storage system. Taking the hybrid energy storage configuration scheme as the optimization variable, the improved life cycle cost was introduced, and a multi-objective energy storage system configuration model of net income volatility waste air volume was established. The model was solved by the improved probabilistic mutation particle swarm optimization (PMPSO) to obtain the Pareto solution set. The solution set was normalized to obtain the optimal allocation scheme of entropy weight. Compared with the single objective optimal scheme, it shows that the optimal allocation scheme of entropy weight takes into account both economy and function. Compared with the adaptive quantum particle swarm optimization (AQPSO), it is verified that the optimal allocation scheme of entropy weight obtained by improved PMPSO algorithm not only ensures the small waste air volume and volatility, but also configures the energy storage with smaller capacity to obtain greater benefits and meet the multi-objective allocation requirements.

To meet the requirements of high energy density and fast charge for energy storage systems and electric vehicles, the high-energy and high-power density lithium-ion batteries have attracted numerous attentions.Designing thick-electrode can significantly increase energy density and reduce cost, and is also compatible with various electrode materials, which makes it one of hottest researches for the development of high-energy density lithium-ion batteries.Thick electrodes usually suffer from poor mechanical properties and sluggish reaction kinetics. Therefore, it is very important to construct a thick electrode with good mechanical properties and fast transport network for lithium ion and electron.The electrochemical behavior and key scientific issues of thick electrodes were firstly analyzed in this review, the current strategies for constructing thick electrodes and their advantages were then introduced, and finally the design principles and the development direction of thick electrodes were pointed out.

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Silicon （Si） has become the most promising anode material for the next generation lithium-ion battery because of its ultra-high theoretical specific capacity. However， the intercalation and removal of lithium-ions will cause a great change in the volume of silicon microparticles (SiMP)， which will lead to the pulverization of SiMP and irreversible attenuation of electrode capacity， which seriously limits the wide application of silicon based materials. A large number of reports in the past have shown that polymer binder can effectively overcome the “island effect” caused by the volume expansion of SiMP . It could maintain the integrity of the electrode in the charge-discharge process， and then improve the electrochemical performance of the electrode. According to the structure classification of polymer binders， they can be roughly divided into four categories， linear， branched， cross-linked and conjugated. When the binders with different molecular structures are used as silicon-based negative electrode， the electrodes show different electrochemical properties. Particularly， when polymer binders with multiple molecular structures are designed， the practical application of silicon-based negative electrodes will be greatly promoted. By analyzing the effects of various polymer binders on the electrochemical properties of silicon anode， the differences of binders with different molecular structures can be clearly obtained， and then provide ideas for the development of silicon anode polymer binder in the future. Finally， this paper proposes the design direction of the next-generation polymer binder to promote its development towards large-scale application and industrial production. [ABSTRACT FROM AUTHOR]

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Copyright of Journal of Shanghai University / Shanghai Daxue Xuebao is the property of Journal of Shanghai University (Natural Sciences) Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Guangxi Normal University - Natural Science Edition is the property of Gai Kan Bian Wei Hui and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The Zn-doped LNO cathode material was synthesized by sol-gel method. The effects of doping different amounts of Zn2+ on the properties of LNO were investigated. The results show that the sample doped with 2 mol% Zn (LNO-2Zn) delivers enhanced cycling performance and rate capability. The capacity retention rate for doped sample is 80.0% at 1 C rate after 100 cycles, which is higher than 74.8% for pristine LNO. Pristine LNO delivers a discharge capacity of only 48 mAh/g at 10C, which is much lower than that of 112.1 mAh/g of LNO-2Zn under the same condition. The introduction of Zn2+ ion reduces the degree of Li/Ni mixing, accelerates the lithium ion transfer, and slows down the harmful phase transition, thereby enhancing the electrochemical performance of LNO. [ABSTRACT FROM AUTHOR]

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Copyright of Acta Materiae Compositae Sinica is the property of Acta Materiea Compositae Sinica Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Acta Materiae Compositae Sinica is the property of Acta Materiea Compositae Sinica Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Materials Engineering / Cailiao Gongcheng is the property of Journal of Materials Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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With the update of mobile and portable electronic equipment, people have higher requirements for improving the performance of lithium ion battery. As a key factor affecting the electrochemical performance of lithium storage-anode materials, its latest research has become a hot spot of widespread concern. Tn this paper, a-SnCHPOi• H,() was exfoliated into Sn (HPOi)■> nanosheets (SNS) by intercalation method, which retained the layered crystal structure and exposed more active sites for lithium storage. Furthermore, the SNS obtained by stripping were further combined with Sn nanoparticles with high specific capacity of lithium storage by electroless plating method. The results show that the Sn/SNS composite has better electrochemical performance of lithium storage than SNS. The specific capacity of Sn/SNS-111 is 475.7 mAh/g at ().1 A/g current density. The specific discharge capacity is 449.5 m Ah/g after 5()() cycles at ().2 A/g current density, and the capacity retention rate is 63.49% after 1 ()0() cycles at 5 A/g current density. This is mainly attributed to the Sn nanoparticles (〜1() nm) uniformly distributed on the SNS surface can provide additional lithium storage sites, and the effective support of SNS to the nanoparticles can alleviate the volume expansion during the charging and discharging process, thus Sn/SNS composites exhibits high lithium storage capacity and good cyclic stability. [ABSTRACT FROM AUTHOR]

Silicon has been widely concerned for its low delithium potential (about 0,4 V), high theoretical specific capacity (4200 mAh/g), abundant resources and environmental friendly. However, silicon materials have serious volume expansion (>3()()%) in the process of delithium, which leads to poor cyclic performance and low coulomb efficiency, and thus hinders its practical application. Tt has been reported that the electrochemical properties of silicon-based anode composites have been significantly improved by using a new strategy of composite treatment of silicon and metal oxides. Tn this paper, the research achievements in recent years are reviewed from the perspectives of coating silicon by metal oxide and introducing silicide and metal particles by in-situ solidstate reaction with silicon, and the problems to be solved and the development trend of modifying silicon anode materials by metal oxide are also described. [ABSTRACT FROM AUTHOR]

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Copyright of Inorganic Chemicals Industry is the property of Editorial Office of Inorganic Chemicals Industry and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

As a new two-dimensional carbon material, grapheyne has π conjugated units, SP² and SP hybrid carbon atoms and adjustable pore structure. It has stable structure, good conductivity and strong plasticity. Its structure can be adjusted by hybridization or modification. It has a good application prospect in the field of electrochemistry. This paper briefly introduced different types of graphyne and their structures, such as α-graphyne, β-graphyne, γ-graphyne and 6,6,12-graphyne, as well as graphdiyne. The synthesis strategies of graphyne and its derivatives are described, including wet and dry methods. There are in-situ synthesis methods of different types of graphyne and graphdiyne, and different structures are obtained through different synthesis or growth methods, such as nano films, nano sheets and nano chains. It also includes the preparation strategy of graphyne derivatives, which adjusts the structure by heteroatom doping or metal atom modification, such as nitrogen atom doping, platinum atom modification and so on. The advanced research results of graphyne and its derivatives in the field of energy are reviewed, including the research results of graphyne and its derivatives in lithium-ion batteries, hydrogen oxygen fuel cells, sodium ion batteries, supercapacitor and other electrochemical energy storage devices and materials. As the anode of lithium-ion battery, the coulomb efficiency and cycle performance of the battery are improved, and the stability of the battery is enhanced. It has good catalytic performance for oxygen reduction reaction and has the prospect of being used as a catalyst for hydrogen oxygen fuel cell. It also has good storage performance for sodium, calcium and magnesium, and has good potential in application with sodium ion batteries and multivalent ion batteries. It shows good cycle performance and specific capacity in supercapacitor. In addition, it also has good theoretical capacity in hydrogen storage. It has a good application prospect in a variety of electrochemical energy storage devices. Comprehensive analysis shows that graphyne, as a new allotrope of carbon, has good performance and optimization potential in structure and electrochemical properties. It has a good development prospect in electrochemical energy storage devices in the future. [ABSTRACT FROM AUTHOR]

Copyright of Inorganic Chemicals Industry is the property of Editorial Office of Inorganic Chemicals Industry and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Lithium-rich manganese-based cathode material is a promising next-generation lithium-ion battery cathode material, however, it exhibits significant differences in electrochemical performance at different temperatures, which severely limits the application in practical environments. A variety of electrochemical measures were used to characterize the difference in electrochemical performance of lithium-rich material within the temperature range of 5-45℃. The influencing factors of material properties and temperature dependence were analyzed from the perspective of polarization. The results show that the charge/discharge capacity of lithium-rich material decreases with decreasing temperature, which is mainly due to the significant increase in the polarization of the oxygen/manganese ion reaction in the high-voltage and low-voltage ranges with decreasing temperature, resulting in a severe decrease in its capacity contribution.The significantly increased polarization is mainly caused by the poor intrinsic kinetic performance of oxygen/manganese ions, which leading to high apparent activation energy of the charge transfer process. In addition, the participation of oxygen and manganese ions in the charge compensation reaction changes the structure of the material seriously.It induces changes in the composition of the interface film, which increases the apparent activation energy of lithium ion transmission at the interface in the low voltage interval. Moreover, it causes bulk diffusion of lithium ions at the end of the charge and discharge process having higher apparent activation energy. Therefore, improving the oxygen/manganese ion reaction kinetics of lithium-rich material is the main method to enhance its environmental adaptability.

In view of the thermal management of power batteries, the new liquid-cooling structure of 18650 cylindrical lithium ion battery array and its cooling effect were studied. An immersion cooling method combined with a checkerboard topology shunt structure was proposed. And by combining the shape and array arrangement of the lithium ion battery, a simple and reasonable immersion cooling topology based on the battery array was formed. Under this new cooling structure, the single model and module model of the battery array were established. Through the numerical simulation, the temperature distribution of the single and module models at every moment was analyzed, and the feasibility of replacing the module model with the single one was verified. On the basis of ensuring the calculation accuracy of the single model, numerical simulations on the layout of the inlet and outlet of the cooling channel were carried out. The results show that the same-side arrangement and the different-side one are almost the same in the pressure drop, but the same-side arrangement is superior to the different-side arrangement in terms of cooling effect. Moreover, with the increase of the heat generation of the battery and the extension of the heating time, the advantages of the arrangement of the inlets and outlets on the same side are more obvious.

Copyright of Journal of Materials Science & Engineering (1673-2812) is the property of Journal of Materials Science & Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Bulletin of the Chinese Ceramic Society is the property of Bulletin of the Chinese Ceramic Society Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Acta Materiae Compositae Sinica is the property of Acta Materiea Compositae Sinica Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)