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Experimental investigation of thermal performance in a solid sensible heat storage device for medium-high-temperature flue gas waste heat recovery Jiulin CHEN, Xiaodi XUE, Li WANG, Zhijue XING Energy Storage Science and Technology    2025, 14 (8): 3185-3193.   DOI: 10.19799/j.cnki.2095-4239.2025.0110 Abstract （246）   HTML （7）    PDF（pc） （5050KB）（13129）       Knowledge map    Save To improve the low utilization efficiency of industrial flue gas waste heat caused by high dust content and significant temperature fluctuations, a novel horizontal flue gas–solid sensible heat storage device employing high-temperature concrete as the thermal storage medium was developed. A pilot-scale system was designed and constructed for the recovery and storage of waste heat from steel sintering ring-cooled flue gas. Experimental investigations were conducted to analyze the temperature distribution, flow resistance characteristics, instantaneous energy efficiency, thermal efficiency, and exergy efficiency of the storage device. The results revealed the formation of thermoclines along the axial direction during charging and discharging, with higher temperatures near the charging inlet and a relatively uniform radial temperature distribution. The device exhibited a low pressure drop, with a gradual pressure increase during charging and a corresponding decrease during discharging. Both the instantaneous energy efficiency and heat transfer power declined over time. Lower flue gas flow rates yielded more stable instantaneous efficiency, extended heat exchange duration, and reduced pressure drop, though at the cost of decreased heat transfer power. Therefore, the optimal flow velocity should be selected according to application requirements. During stable operation, the system achieved a heat storage capacity of 1376 kWh, with thermal and exergy efficiencies of 93.02% and 91.7%, respectively. The parallel-plate heat exchange structure enabled efficient heat transfer between the solid storage unit and dusty flue gas while effectively mitigating ash deposition and channel blockage. These findings provide an experimental foundation for the scale-up and application of flue gas-solid sensible heat storage systems. Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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Recent progress on evolution of safety performance of lithium-ion battery during aging process REN Dongsheng, FENG Xuning, HAN Xuebing, LU Languang, OUYANG Minggao Energy Storage Science and Technology    2018, 7 (6): 957-966.   DOI: 10.12028/j.issn.2095-4239.2018.0165 Abstract （2651）      PDF（pc） （10433KB）（11917）       Knowledge map    Save Safety is a major concern of the large-scale application of lithium-ion batteries. The safety performance of lithium-ion batteries not only depends on materials and cell design, but would also changes during aging process. The effects of aging on the battery safety performance require further investigation to ensure the full-life cycle safety of lithium-ion batteries. This paper has reviewed the recent progress on the evolution of battery safety performance under different aging conditions (including cycling and storage). The correlations between aging mechanisms and the changes of battery safety performance are further summarized. Lithium plating on anode surface is found to be the key factor of full-life cycle safety of lithium-ion batteries. Furthermore, the problems and future researches on the evolution of battery safety performance are discussed. Reference | Related Articles | Metrics | Comments（0）

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All-solid-state lithium-ion batteries:State-of-the-art development and perspective XU Xiaoxiong, QIU Zhijun, GUAN Yibiao, HUANG Zhen, JIN Yi Energy Storage Science and Technology    2013, 2 (4): 331-341.   DOI: 10.3969/j.issn.2095-4239.2013.04.001 Abstract （7569）      PDF（pc） （3840KB）（11449）       Knowledge map    Save Conventional lithium-ion secondary batteries have been widely used in portable electronic devices and are now developed for large-scale applications in hybrid-type electric vehicles and stationary-type distributed power sources. However, there are inherent safety issues associated with thermal management and combustible organic electrolytes in such battery systems. The demands for batteries with high energy and power densities make these issues increasingly important. All-solid-state lithium batteries based on solid-state polymer and inorganic electrolytes are leak-proof and have been shown to exhibit excellent safety performance, making them a suitable candidate for the large-scale applications. This paper presents a brief review of the state-of-the-art development of all-solid-state lithium batteries including working principles, design and construction, and electrochemical properties and performance. Major issues associated with solid-state battery technologies are then evaluated. Finally, remarks are made on the further development of all-solid-state lithium cells. Reference | Related Articles | Metrics | Comments（0）

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Analysis of electromagnetic and thermal characteristics of magnetic bearings in flywheel energy storage systems Xiankui WEN, Bowen LI, Zhengjun SHI, Huayang YE, Lingrong PANG, Xiaoyin ZHANG Energy Storage Science and Technology    2025, 14 (8): 2932-2941.   DOI: 10.19799/j.cnki.2095-4239.2025.0523 Abstract （195）   HTML （4）    PDF（pc） （4786KB）（11427）       Knowledge map    Save The flywheel energy storage system converts electrical energy into kinetic energy by accelerating the flywheel through a motor, storing the energy, decelerating and braking the flywheel to generate electricity, and releasing kinetic energy. The system relies on power electronic devices to control the acceleration or deceleration of the motor to achieve energy conversion. Characterized by a fast response, high charging and discharging frequency, high conversion efficiency, and long service life, flywheel energy storage systems are widely used in fields such as power frequency regulation, energy recovery, and uninterrupted power supply. In this study, a scheme for the magnetic bearing of a high-power flywheel energy storage system is designed by utilizing a support method combining radial and axial heavy-load electromagnetic bearings. The finite element method is used to complete the analysis of the electromagnetic performance of the system through simulation. Furthermore, a multi-physics coupled model is established for analysis of the bidirectional coupling between the electromagnetic and thermal fields, enabling comprehensive evaluation of the temperature distribution of the magnetic bearings under different current conditions. The performance of the designed heavy-duty electromagnetic bearing meets the design requirements, and the natural air-cooling method can ensure the safe operation of the system. Although reducing the coil current contributes to improving the thermal safety, it also leads to a decrease in the electromagnetic force. Therefore, the design of magnetic bearings for flywheel energy storage systems must achieve a proper trade-off between thermal management and the electromagnetic performance. Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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Overview of the failure analysis of lithium ion batteries WANG Qiyu, WANG Shuo, ZHANG Jienan, ZHENG Jieyun, YU Xiqian, LI Hong Energy Storage Science and Technology    2017, 6 (5): 1008-1025.   DOI: 10.12028/j.issn.2095-4239.2017.00022 Abstract （6718）      PDF（pc） （38291KB）（10969）       Knowledge map    Save The failure problems, associated with capacity fade, increased internal resistance, gas generation, electrolyte leakage, short circuit, battery deformation, thermal runaway, lithium deposition and etc., are the major issues that limit the performances, reliability and consistency of the commercialized lithium ion batteries. These problems are the result of a complex interplay of a host of chemical and physical mechanisms. A reliable analysis and fundamental understanding of aging characteristics is of critical significance for development of battery. The failure analysis of lithium ion batteries is started with the identification of the failure effects, then selected the advisable analysis methods to establish the high efficiency procedures to target the problems and thus to find out the primary causes as well as to provide reliable suggestions for further optimization of material fabrication and battery engineering. This article discusses the failure effects and their causes in lithium ion batteries. The procedure of the failure analysis and the inspection methods will also be presented. Some cases of failure analysis are reviewed in this manuscript, such as capacity fade, thermal runaway, and gas generation. Reference | Related Articles | Metrics | Comments（0）

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Application of artificial intelligence in flywheel energy storage Lu WEI, Zhiyi LENG, Jia YE, Yujie XU, Haisheng CHEN Energy Storage Science and Technology    2025, 14 (8): 3019-3027.   DOI: 10.19799/j.cnki.2095-4239.2025.0658 Abstract （180）   HTML （7）    PDF（pc） （726KB）（9530）       Knowledge map    Save Flywheel energy storage systems (FESSs) offer outstanding advantages in grid frequency regulation, inertia support, high-frequency peak shaving, and other applications due to their high power density, long service life, rapid responses, and environmental friendliness. However, FESSs face challenges related to achieving cost effectiveness and design reliability, stability of high-speed permanent magnet motors, control of magnetic suspension control, online prediction of faults, and control of multimachine parallel arrays. This paper reviews recent literature on the application of artificial intelligence (AI) technologies in key areas of FESSs, including design optimization, motor control, magnetic suspension control, grid-connected control, and fault diagnosis. Particular focus is given to the use of algorithms such as neural networks in several technical domains: modeling and analysis of composite material rotors, multiparameter collaborative optimization of permanent magnet synchronous motors (PMSMs), efficiency optimization and speed estimation of PMSMs under varying conditions, electromagnetic bearing control algorithms, grid-connected system robustness and distributed collaborative control, frequency regulation strategies, and bearing fault diagnosis and early warning. Future development directions such as the integration of large AI models and multitechnology collaborative optimization are also discussed. These insights aim to support intelligent research and development in FESSs. Reference | Related Articles | Metrics | Comments（0）

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Boosting sodium battery energy storage: New research progress of pre-sodiation technology Jingyu XIANG, Wei ZHONG, Shijie CHENG, Jia XIE Energy Storage Science and Technology    2025, 14 (8): 3051-3064.   DOI: 10.19799/j.cnki.2095-4239.2025.0399 Abstract （328）   HTML （17）    PDF（pc） （13495KB）（9013）       Knowledge map    Save Sodium and lithium exhibit similar physicochemical properties, and sodium resources are abundant and widely distributed. Accordingly, sodium-ion batteries (SIBs) are regarded as promising complements to lithium-ion battery energy storage systems, with broad potential for large-scale and short-term high-frequency energy storage applications. However, the initial coulombic efficiency (ICE) of sodium-storage anode materials is generally low, preventing them from realizing their theoretical capacity. Pre-sodiation technology, as one of the most effective active sodium compensation strategies, can effectively mitigate active sodium loss. This paper comprehensively analyzes the major challenges facing pre-sodiation technology in recent years and summarizes novel approaches proposed to address these issues. Based on the redox properties of various sodium sources, current pre-sodiation techniques are categorized into reductive and oxidative pre-sodiation. The advantages, disadvantages, and industrial feasibility of different pre-sodiation methods are compared, with a focus on elucidating their mechanisms and research progress. Furthermore, the development prospects of pre-sodiation technology are discussed. This review aims to deepen understanding of pre-sodiation technology and provide theoretical guidance and innovative insights for optimizing and developing novel pre-sodiation techniques suitable for high-power applications at scale. Based on existing research, we propose that solid-state oxidative pre-sodiation materials hold promise for enabling multiple sodium replenishments throughout the battery's lifecycle, thereby establishing a technical foundation for high-power, high-energy-density sodium-ion batteries. Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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Reviews of 100 selected recent papers on lithium batteries (December 1, 2024 to January 31, 2025) Xinxin ZHANG, Guanjun CEN, Ronghan QIAO, Jing ZHU, Junfeng HAO, Qiangfu SUN, Mengyu TIAN, Zhou JIN, Yuanjie ZHAN, Yong YAN, Liubin BEN, Hailong YU, Yanyan LIU, Hong ZHOU, Xuejie HUANG Energy Storage Science and Technology    2025, 14 (3): 1310-1330.   DOI: 10.19799/j.cnki.2095-4239.2025.0155 Abstract （1441）   HTML （90）    PDF（pc） （1659KB）（8825）       Knowledge map    Save This bimonthly review provides a comprehensive overview of recent research on lithium batteries. A total of 5413 online papers published between December 1, 2024 and January 31, 2025 were examined using the Web of Science database. Using the BERTopic model, the abstract texts were analyzed, and a research topic map for lithium battery studies was generated. From these, 100 papers were selected for in-depth discussion. The selected studies covered various aspects of lithium batteries. Research on cathode materials, including Ni-rich layered oxides and LiNi0.5Mn1.5O4, focuses on improvements through doping, surface coating, and microstructural modifications. The cycling performances of Si-based anodes were enhanced through structural design. Considerable efforts have been devoted to interfacial and bulk structure design for lithium metal anodes. Studies on solid-state electrolytes examined structural design and performance in polymer, sulfide, and halide electrolytes as well as their composite forms. In contrast, liquid electrolytes were improved through optimized solvent and lithium salt designs for different battery applications and the incorporation of novel functional additives. For solid-state batteries, studies have explored cathode modification, surface coating, and synthesis methods as well as interface construction and three-dimensional structural design for lithium metal anodes. Interface modifications of current collectors for anode-free batteries have also been widely investigated. In lithium-sulfur batteries, the structural design of the cathode and liquid electrolyte contributes to extended cycle life. In addition, lithium-sulfur and lithium-oxygen batteries have garnered considerable attention. Other studies have investigated ion transport and degradation mechanisms in electrodes, lithium deposition morphology, and solid electrolyte interphase evolution. Research has also addressed thermal runaway analysis in full batteries, theoretical simulations of solvent effects on the cathode electrolyte interphase, and optimization of manufacturing processes. Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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Recent advances in theoretical and computational simulations of pseudocapacitors Fuxu XING, Qi QIN, Longkang WANG, Yubing LI, Shuaikai XU, Tangming MO Energy Storage Science and Technology    2025, 14 (8): 3004-3018.   DOI: 10.19799/j.cnki.2095-4239.2025.0519 Abstract （388）   HTML （12）    PDF（pc） （12263KB）（8536）       Knowledge map    Save Pseudocapacitors are highly attractive for energy storage applications due to their ability to deliver both high energy and power densities. Over the past decade, significant progress has been made in developing and optimizing pseudocapacitive materials. Nevertheless, the intrinsic complexity of pseudocapacitive interfaces and their rapid charge-discharge dynamics pose considerable challenges for conventional experimental techniques to elucidate the coupled ion transport and charge transfer mechanisms. A comprehensive understanding of the microscopic processes underlying pseudocapacitance remains a major challenge. This review systematically traces the evolution of pseudocapacitance theory, emphasizing its fundamental distinctions from electric double-layer capacitance and battery-type behavior. By integrating recent advances in computational modeling, we critically evaluate the essential role of simulations in unraveling pseudocapacitive mechanisms. Key methodologies discussed include first-principles calculations, molecular dynamics simulations, implicit solvation models, ab initio molecular dynamics, continuum transport models, and multiscale simulation strategies. These approaches provide valuable theoretical insights into interfacial reaction kinetics, ion transport pathways, and structure-property relationships, thereby informing the rational design of high-performance pseudocapacitors. Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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Experimental measurement and analysis methods of electrochemical impedance spectroscopy for lithium batteries LING Shigang, XU Jieru, LI Hong Energy Storage Science and Technology    2018, 7 (4): 732-749.   DOI: 10.12028/j.issn.2095-4239.2018.0092 Abstract （4900）      PDF（pc） （23460KB）（7542）       Knowledge map    Save Electrochemical impedance spectroscopy (EIS) is an important electrochemical measurement method. It is widely used in the field of electrochemistry, especially in lithium ion batteries, such as measuring the electrical conductivity, apparent chemical diffusion coefficient, growth and evolution of SEI, charge transfer and the mass transfer process. This paper mainly focused on the basic principle of electrochemical impedance spectroscopy (EIS), the testing methods, the matters needing attention and the equipment used in the electrochemical impedance measurement. Finally, the application of the electrochemical impedance spectroscopy in the lithium ion battery is introduced in a practical case. Reference | Related Articles | Metrics | Comments（0）

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Na-ion batteries: From fundamental research to engineering exploration RONG Xiaohui, LU Yaxiang, QI Xingguo, ZHOU Quan, KONG Weihe, TANG Kun, CHEN Liquan, HU Yongsheng Energy Storage Science and Technology    2020, 9 (2): 515-522.   DOI: 10.19799/j.cnki.2095-4239.2020.0054 Abstract （5953）   HTML （578）    PDF（pc） （3020KB）（7177）       Knowledge map    Save With the increasing demand for low-cost energy storage systems, more and more researchers and engineers have been involved in the fundamental research and engineering exploration of Na-ion batteries (NIBs), which grew rapidly in the past decade. This article firstly analyzes the situation of global lithium resource, especially the potential risks in China. Then we review the history of NIBs and introduce their global industrialization status in recent years. According to the latest research progress in this field, we summarize seven advantages of NIBs in terms of cost, performance, etc., which endows NIBs with huge development potential. Finally, we focus on introducing our work on the development and mass production of low-cost electrode materials such as copper-based layered oxide cathodes and disordered carbon anodes, as well as the application demonstration and engineering scale-up of NIBs. The successful demonstration of Ah-grade cells and battery packs for NIBs has initially proved their feasibility. By optimizing electrode materials, electrolytes, manufacturing and integration, and battery management, it is expected to further improve the comprehensive performance of NIBs, and realize the practical applications in low-speed electric vehicles, data center backup power supplies, communication base stations, household/industrial energy storage systems, and large-scale energy storage. Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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Disturbance-free switching control technology for energy storage converters between grid-following and grid-forming modes Gongqiang LI, Lulu ZHAO, Fengxiang XIE, Yongdong JI, Jingjia LIU, Yanqiao CHEN, Yi JIN Energy Storage Science and Technology    2025, 14 (8): 2983-2993.   DOI: 10.19799/j.cnki.2095-4239.2025.0642 Abstract （253）   HTML （8）    PDF（pc） （5769KB）（6571）       Knowledge map    Save Energy storage systems (ESS) that operate solely in either grid-following (GFL) or grid-forming (GFM) control modes are insufficient for the demands of complex and dynamic power grids. This study proposes a seamless GFL/GFM switching control method for energy storage converters, enabling smooth transitions between GFM and GFL modes in response to environmental changes. The proposed method leverages the steady-state vector relationships of the two control modes and integrates key modules, including power angle observation, coordinate system rotation, and proportional-integral (PI) regulator initialization. Through impedance-based analysis, the correlation between system stability and the grid short-circuit ratio (SCR) under both modes is examined. It is demonstrated that dynamic variations in SCR can be effectively managed via hybrid GFL/GFM control and seamless switching, thereby improving system stability. The proposed approach is validated through simulation studies conducted using a MATLAB/Simulink model of an ESS. The results confirm that the converter achieves seamless transitions between GFL and GFM control, with enhanced responsiveness and stability. This research enhances the operational flexibility of high-power, high-frequency grid-forming ESS, enabling reliable performance in diverse scenarios such as grid-connected/off-grid operation and strong/weak grid conditions, and ensuring system safety and stability under varying external conditions. Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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Review of the research on industrialization and applications of supercapacitors Xinkai SU, Lulu ZHAO, Yanqiao CHEN, Chu WANG, Huanjun CHEN, Yi JIN Energy Storage Science and Technology    2025, 14 (8): 2994-3003.   DOI: 10.19799/j.cnki.2095-4239.2025.0522 Abstract （309）   HTML （13）    PDF（pc） （7148KB）（6470）       Knowledge map    Save With the transformation of China's energy structure, the demand for energy storage devices with rapid response, high-frequency regulation, and intrinsic safety for the new power systems is increasing. Supercapacitors have attracted considerable attention owing to their advantages as energy storage devices, including their high power density, long cycle life, wide-temperature range of operation, and no safety hazards due to dendrite growth. This review systematically evaluates the technical systems and application progress of supercapacitors. In terms of cell research and development, the typical technical routes and performance of two types of electric double-layer supercapacitors and hybrid supercapacitors are analyzed. In terms of system applications, this review discusses the implementation of supercapacitors in several applications such as wind turbine pitch systems, energy storage in new energy systems, frequency modulation in thermal power plants, independent energy storage systems, and transportation. In addition, this review briefly discusses the use of supercapacitors in other applications such as kinetic energy recovery of power machinery (e.g., cranes), data center backup power systems, and power equipment. Finally, the challenges still facing supercapacitors in energy density, life cycle cost, and application scenarios are analyzed. Future research is discussed, focusing on its prioritization of three areas: developing new material systems, promoting the diversification of application scenarios, and innovating a "supercapacitor+" hybrid energy storage model. Finally, the review discusses the necessity of broadening the commercial application of supercapacitors in new power systems through system and scenario innovation with differentiated products. Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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Lithium sulfide: the "cornerstone" material in the era of all-solid-state batteries Tete HE, Yang LU, Yang LIU, Bin XU, Yongle CHEN, Fangyang LIU Energy Storage Science and Technology    2025, 14 (3): 898-912.   DOI: 10.19799/j.cnki.2095-4239.2025.0030 Abstract （2059）   HTML （112）    PDF（pc） （4331KB）（6260）       Knowledge map    Save Lithium sulfide (Li2S), as a critical precursor for synthesizing high-performance sulfide solid electrolytes, forming the foundation of the industrial development of sulfide-based all-solid-state batteries (ASSBs). Achieving a deep understanding of Li2S's key physicochemical properties, alongside advancing high-quality, cost-effective, and scalable fabrication techniques, is strategically significant for the sulfide ASSB industry. This study elucidates the central role of Li2S within the technological framework of ASSBs, emphasizing its core physicochemical parameters, key performance metrics, and their critical impact on industrial applications. Five promising synthesis methos are systematically reviewed from an industrial feasibility perspective, including direct sulfurization of metallic lithium, carbothermal reduction, hydrazine hydrate reduction, liquid-phase metathesis, and hydrogen sulfide neutralization. A multidimensional evaluation framework is constructed to compare these techniques across several dimensions, such as process characteristics, product performance, safety risks, and economic viability. This analysis identifies the key bottlenecks restricting the industrialization of Li2S and proposes targeted strategies for optimization. Potential future directions in large-scale production technologies are also outlined. This study aims to serve as a valuable reference for the industrial production of Li2S and its efficient integration into sulfide-based all-solid-state batteries, thereby facilitating technological advancements and cost reductions in sulfide solid electrolyte systems. Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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Prototype all-solid-state battery electrodes preparation and assembly technology Yanming CUI, Zhihua ZHANG, Yuanqiao HUANG, Jiu LIN, Xiayin YAO, Xiaoxiong XU Energy Storage Science and Technology    2021, 10 (3): 836-847.   DOI: 10.19799/j.cnki.2095-4239.2021.0090 Abstract （2989）   HTML （360）    PDF（pc） （4492KB）（6192）       Knowledge map    Save All-solid-state lithium batteries, with good safety, long life and high energy, are an emerging option for next-generation technologies on the road to a green energy storage device. All-solid-state lithium batteries are prepared with all-solid electrode and all-solid electrolyte without liquid additives. Therefore, the electrode preparation and assembly of all solid-state lithium batteries are quite different from those of existing liquid lithium batteries. Here we summarize the typical assembly approaches of prototype all-solid-state batteries using oxide, sulfide, or polymer as solid electrolytes, providing reference for all-solid-state battery researchers.In this paper, the electrode preparation and assembly technology with the corresponding performance characteristics of several typical all-solid-state lithium batteries are reviewed in detail. The structure, cathode preparation methods, anode modification methods and battery assembly methods of oxide, sulfide and polymer solid electrolyte are summarized and analyzed respectively. Finally, some suggestions on the laboratory development and assembly methods of all solid state lithium batteries are given. Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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Research progress of energy storage technology in China in 2021 Haisheng CHEN, Hong LI, Wentao MA, Yujie XU, Zhifeng WANG, Man CHEN, Dongxu HU, Xianfeng LI, Xisheng TANG, Yongsheng HU, Yanwei MA, Kai JIANG, Hao QIAN, Qingsong WANG, Liang WANG, Xinjing ZHANG, Xing WANG, Dehou XU, Xuezhi ZHOU, Wei LIU, Xianzhang WU, Donglin WANG, Qinggang HE, Zifeng MA, Yaxiang LU, Xuesong ZHANG, Quan LI, Liumin SUO, Huan GUO, Zhenhua YU, Wenxin MEI, Peng QIN Energy Storage Science and Technology    2022, 11 (3): 1052-1076.   DOI: 10.19799/j.cnki.2095-4239.2022.0105 Abstract （4044）   HTML （513）    PDF（pc） （1662KB）（6175）       Knowledge map    Save Research and development progress on energy storage technologies of China in 2021 is reviewed in this paper. By reviewing and analyzing three aspects of research and development including fundamental study, technical research, integration and demonstration, the progress on major energy storage technologies is summarized including hydro pumped energy storage, compressed air energy storage, flywheel, lead battery, lithium-ion battery, flow battery, sodium-ion battery, supercapacitor, new technologies, integration technology, fire-control and safety technology. The results indicate that extensive improvements of China's energy storage technologies have been achieved during 2021 in terms of all the three aspects. China is now the most active country in energy storage fundamental study and also one of the core countries of technical research and demonstration. Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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Research progress of lithium ion battery solid-electrolyte interface(SEI) LIANG Dayu, BAO Tingting, GAO Tianhui, ZHANG Jian Energy Storage Science and Technology    2018, 7 (3): 418-423.   DOI: 10.12028/j.issn.2095-4239.2018.0059 Abstract （4977）      PDF（pc） （454KB）（5843）       Knowledge map    Save The lithium ion battery solid-electrolyte interface (SEI) is a thin-layer film formed on the surface of electrodes due to redox decomposition of electrolyte in the initial charging process. SEI film with high ionic conduction and electrical resistance is quite necessary for the long-term usage of lithium ion batteries and has a crucial impact on their capacity, rate, cycling and safety performances. However, because of its complex formation processes and great difficulties in making accurate characterization, only a superficial knowledge of SEI derive from some experimental observation or model hypothesis, thus quantitative analysis and controllable structural optimization are still needed to be further investigated. This paper reviews the formation process, the influence factors,some research ideas and current research status of SEI film. In addition, some potential research directions of SEI have been presented, including investigating the formation mechanism and role of SEI on the surface of cathode materials, optimizing the electrolyte formulas through solvents, lithium salts and additives to facilitate the formation of more stable SEI films, adopting advanced in-situ analysis methods and theoretical calculation methods to analyze chemical composition, morphology and microstructure of SEI, exploring effective ways to construct artificial SEI film and realize controllable structural modification. Reference | Related Articles | Metrics | Comments（0）

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The assembly, charge-discharge performance measurement and data analysis of lithium-ion button cell WANG Qiyu, CHU Geng, ZHANG Jienan, WANG Yi, ZHOU Ge, NIE Kaihui, ZHENG Jieyun, YU Xiqian, LI Hong Energy Storage Science and Technology    2018, 7 (2): 327-344.   DOI: 10.12028/j.issn.2095-4239.2018.0022 Abstract （3114）      PDF（pc） （17246KB）（5273）       Knowledge map    Save In the initial stage of basic research and evaluation of products, electrochemical performances of lithium ion batteries are measured commonly through button cell. Accurate measurements and standard analysis are essential for screening materials, exploring new materials and batteries. Based on previous literature and practical experience, this paper summarizes the assembly, charge-discharge measurements and data analysis of lithium-ion button cell in laboratory. Related Articles | Metrics | Comments（0）

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R&D vision and strategies on solid lithium batteries LI Hong1，2, XU Xiaoxiong3 Energy Storage Science and Technology    2016, 5 (5): 607-614.   DOI: 10.12028/j.issn.2095-4239.2016.0023 Abstract （1977）      PDF（pc） （12899KB）（4878）       Knowledge map    Save Increasing energy density of rechargeable batteries is highly desired by many emerging applications. It is necessary to identify possible solutions for achieving both high energy density and other required performances. Based on personal knowledge and understandings, this perspective paper summarizes the main scientific and technological problems of solid lithium battries as well as reported solutions. In view of practical application, the features of four types solid lithium batteries with different solid electrolyte are compared. And a roadmap is drawn accordingly. In addition, the technological targets of the energy density of lithium batteries from USA, Japan and China government are listed. The positions of the solid lithium batteries in the roadmap are marked. Reference | Related Articles | Metrics | Comments（0）

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Conductivity test and analysis methods for research of lithium batteries XU Jieru, LING Shigang, WANG Shaofei, PAN Du, NIE Kaihui, ZHANG Hua, QIU Jiliang, LU Jiaze, LI Hong Energy Storage Science and Technology    2018, 7 (5): 926-957.   DOI: 10.12028/j.issn.2095-4239.2018.0162 Abstract （3668）      PDF（pc） （37535KB）（4810）       Knowledge map    Save Lithium ionic conductivity, electronic conductivity of active electrode materials and lithium ionic conductivity of electrolyte materials are closely related to the dynamic behavior of lithium batteries. Therefore, conductivity test and analysis contribute the understanding of electrochemical properties of materials, including direct current method (DC), alternating current impedance (AC impedance), and direct current polarization method (DC polarization). Based on the different conductivity characteristics of electrolyte materials and active electrode materials, this paper introduced the methods, principles, equipments, test procedures and precautions of conductivity test. Besides, the analysis of data was illustrated with specific cases of lithium batteries. Reference | Related Articles | Metrics | Comments（0）