快速充电锂离子电池研究进展

Research Progress of Fast Charging Lithium-Ion Batteries

电池产业发展的重要方向之一是提高锂离子电池快速充电能力。然而,快速充电电池经常遭受容量和功率性能衰减。快充电池开发涉及多尺度问题,因此要从原子层面到电池水平进行充分考虑。从现有的文献资料出发,概括总结了开发具有快充性能电池的一些关键要素。这些要素包括提高正极材料锂离子迁移速度、加快锂离子嵌入负极材料的速度、提高电解液离子导电性、选择快充型隔膜、提高电极离子和电子导电性以及充电策略的选择。

Improve the fast charging ability of li-ion battery is one of the important development directions of battery industry.However,fast charging battery often suffers from capacity and power performance degradation.Development of fast charging battery involving multiscale problem,needed to take into full consideration from atomic to battery level.In this paper,some of the key elements of developing fast charging battery were summarized based on the existing literatures.These elements include improving fast charging ability of batteries,improving the migration rate of lithium ions in the cathode material,speeding up the insertion rate of lithium ions into the anode material,increasing the ion conductivity of electrolyte,choosing the fast charge separator,enhancing the conductivity of ions and electrons in the electrode,and optimizing charge protocols.