钛酸锂基锂离子电池及其健康状态研究进展

锂离子电池的高功率密度和高能量密度等特性使其成为电动汽车能源和新能源电网储能的重要载体。功率性能和安全特性是锂离子电池发展的两个主要挑战。钛酸锂Li₄Ti₅O₁₂材料因具有良好的结构稳定性、安全性能、长循环寿命、高功率特性和高低温放电性能,被认为是锂电池负极材料的良好备选。综述了以钛酸锂材料为负极的锂离子电池的相关工作,介绍了钛酸锂材料的结构、电化学特性、制备方法和作为电池负极材料面临的主要问题,重点介绍了钛酸锂负极电池的全电池性能和健康状态研究等方面。

A Review of Electric Performance and SOH Research for Li4Ti5O12 Based Batteries

The high-power density and high energy density are the two features which make Li-ion batteries an important choice of electric vehicle power and energy storage power station of new energy grid. The two challenges of Li-ion batteries are their high-power performance and safety performance. Spinel Li₄Ti₅O₁₂ is considered as one of the most promising substitutes of graphite as anode material, due to its structural stability, safety, long cycle life, high-power feature and discharging ability at high and low temperature. In this paper, the development of Li₄Ti₅O₁₂ based batteries was reviewed, the structure, electrochemical feature, preparation methods of Li₄Ti₅O₁₂ material and its problems as anode of Li-ion batteries were introduced, and the electric performance and state of health (SOH) research of full cell based on Li₄Ti₅O₁₂ material were mainly introduced.