In recent years, rechargeable batteries have attracted the attention of more researchers because of its low cost, simple operation, safety and environmental protection. Compared with lithium-ion batteries, sodium, potassium, magnesium, zinc and aluminum ion batteries have unique advantages in terms of cost and safety, and provide newstrategy for the development of battery-type energy storage systems (BESS) and electric vehicles (EVs). Cathode materials is one of the important components of ion battery, and its properties will directly affect the working condition of the entire battery system. Herein, we review the latest advances and progresses of ion battery cathode materials, as well as ion storage mechanisms. In addition, we explore the relationship between structure and electrochemical properties to summary various methods for improving ion storage performance, thereby making low-cost ion batteries closer to sustainable large-scale energy storage systems.

Based on the importance of lithium-ion battery simulation in the production and application of new energy vehicle power batteries, the classification of lithium-ion battery models and the development in recent years, including the centralized quality model, one-dimensional model, two-dimensional model, three-dimensional model research and multi-physics coupled models with multiple dimensional sub-models, and summarizes the shortcomings of the current model and the future development needs.

With the widespread use of new energy vehicles, the thermal safety of power lithiumion batteries has become increasingly prominent. In this paper, based on Bernardi thermogenesis mechanism and coupled with different physical quantities, the thermal characteristics of single battery is introduced from electrochemical-thermal coupling model, electro-thermal coupling model and thermal abuse model respectively. Due to the increase of battery energy density and the increasing complexity of driving conditions, power lithium ion batteries are prone to heat accumulation and even cause thermal runaway. In this regard, this paper summarizes the common cooling methods of commercial power battery packs. Finally, based on the thermal runaway propagation mechanism and the measured results affecting the safety of the battery module, effective methods for blocking the thermal runaway propagation of the monomer and the basic module is introduced.

The performance and cost of an electric vehicle depend to a large extent on the performance and service life of the power battery pack, while the performance and service life of the battery pack are affected by the heat generated by the battery unit. Studying the heat generation characteristics and influencing factors during the charging and discharging process of lithium ion batteries is of guiding significance for the development and use of lithium batteries. This paper begins with five aspects of ambient temperature, charge and discharge rate, battery material, nuclear power state and aging degree. The effects of various factors on the heat production of lithium ion batteries are reviewed.

In order to promote the optimization and upgrading of the energy industry, the development and utilization of renewable energy has been increased, and the planning, operation and dispatching management of the power grid will face important change. Advanced large-scale energy storage technology is urgently needed to improve the power generation characteristics of renewable energy. This paper discussed application of electrochemical energy storage technology in the grid systems, and maked deep analysis on security, cost and technical characteristics, and summarized advantages and disadvantages of various types of electrochemical energy storage. Finally, the application prospect of electrochemical energy storage in the grid system and analyzed and prospected.

With the increasing support of the national policy on the electric vehicle, the bottleneck of the electrochemical performance of the Li-ion battery is becoming more and more prominent. The safety of the lithium-ion battery has not been resolved since the material's chemical performance is limited. The effects of lithium, lithium, lithium iron phosphate and ternary materials on the electrochemical performance of lithium-ion battery positive electrode material, lithium, lithium manganate, lithium iron phosphate and ternary material on the electrochemical properties of the battery were summarized.

The thermal characteristics of lithium ion batteries directly affect their performance (such as capacity, internal resistance and power, etc) and the thermal safety in practical applications, which is also the most concerned aspect of consumers. In order to better guide the design of lithium ion battery and the strategy during safe and efficient application for the production and life, therefore, intensive study of thermal characteristics for lithium ion battery in various conditions is quite important and necessary. In this paper, from the two aspects of experimental methods and model simulation methods, the research progress on the thermal problems of lithium ion batteries is summarized and analyzed in detail, and the advantages and disadvantages of the two research methods are pointed out. Therefore, in future research, researchers should combine experimental means and model simulation methods to study the thermal problems of lithium ion batteries.

The F-doped SiO@C composites material were synthesized via mechanical fusion and heating coating of SiO, pitch and polyfluortetraethylene (PTFE). The morphology structure and the phase composition of the samples were characterized by SEM, TEM, XRD, infrared carbon and sulfur analysis, laser particle analyzer, powder resistivity and specific surface area. Results showed that:when the dosage of PTFE was 20%, the SiO@C-F composites had the excellent electrochemical performance, witch exhibited the reversible capacity of 1426.8 mA·h/g, initial coulombic efficiency of 77.01% and capacity retention of 83.95% after 20 cycles.

The large-scale energy storage technology is the core technology to realize the gridconnection and popularization of renewable energies. It is also the key enabling technology to develop energy internet, distributed power generation, auxiliary services, off-grid power supply, safe backup power and other fields. The flow battery is an emerging large-scale energy storage technology. After the rapid development in recent years, it has the competitiveness for large-scale applications. The flow battery has features of safety, long energy storage time in single cycle, independent power/capacity design, large energy storage capacity and long cycle life. The high cost of flow battery restricts the commercialization of flow battery energy storage technology. Aiming at the "pain point" of this industry, a flow battery is developed through innovative battery structure, new key materials and process research in this work. The power density of this flow battery stack is increased by 2~4 times. The miniaturization of flow battery stack was realized. The utilization ratio of key components is effectively improved, and the cost of this flow battery system is expected to be reduced by 20%~30% compared to present flow battery.

In this paper, the thermal runaway characteristics and key parameters of NCM811 highspecific energy lithium ion battery were obtained through the experimental study of thermal runaway under the conditions of low-oxygen environment, electrical abuse, thermal abuse and mechanical abuse, providing technical support for further thermal runaway early warning and fire fighting research.

This paper introduces the difference of internal resistance between two types of modules, each module has different surface treatment methods for super capacitor pole terminals, after the two types of modules are assembled into two types energy storage, testing the difference of internal resistance consistency changes. The results show that two different surface treatment of the super capacitor pole terminal have different effects on its performance.

With the increasing penetration of the photovoltaic (PV) power generation system into the grid, the problems of the power of the PV power generation system into the grid and the PV electricity curtailment, which are caused by the uncertainty and intermittence of the PV power generation system have attracted attention. However, the "PV + energy storage" mode can effectively alleviate these problems. Taking the battery capacity degradation characteristics and the PV electricity curtailment into consideration, this paper simulates the operation of the system composed of the different PV power generation subsystem with the distinct types batteries, aiming to eliminate the impacts of the fluctuation characteristics of PV power generation on the grid. What's more, this work studies the operation strategy of the distributed energy storage system under the output smoothing scenario, and optimizes the operation of each energy storage battery array in the energy storage system. Finally, a practical case study of 20 MW (peak value) multiple types battery energy storage system in Republic area is used to verify the simulation method.

The influence of the content changes of graphite, activated carbon, carbon black, barium sulfate and lignin in the negative electrode of lead carbon on the battery performance was studied by orthogonal experimental method. The total content of graphite and activated carbon remained 1.5%, and the ratio of graphite and activated carbon was changed. The content of carbon black was 0~0.5%, barium sulfate was 0.6%~1.2%, and lignin was 0.15%~0.35%. The battery performance was evaluated by capacity test, low temperature performance test and cycle performance test. The experimental results show that the carbon black and lignin have more influence on the battery low temperature performance, do not contain carbon black and lignin content of 0.35% had the best performance in low temperature respectively. The content of carbon black and the ratio of the graphite and activated carbon have more influence on cell cycle performance, adding of carbon black was unfavorable to the cycle life, the best PSOC performance was obtained when the activated carbon and graphite were added at 1:1.