锂离子电池硅基负极改性研究新进展

Research Progress in Silicon Based Anode Materials for Lithium-ion Batteries

硅因其具有极高的理论容量而成为现阶段锂离子电池用负极材料研究的热点。介绍了硅基负极材料嵌/脱锂的原理,总结了目前缓解硅开裂与粉碎的一般方法,分析了现行研究中的不足。聚吡咯具有高导电性、高弹性、多孔、高稳定性等优点,为了提高负极材料循环稳定性能,将其与硅结合得到的Si-PPy复合材料将是最有希望的发展方向。

Due to its high capacity, silicon based anode materials have been widely studied in recent years. The insertion/interinsertion lithium-ion principle of silicon anode for lithium-ion battery is mainly analyzed, the latest allevi ation methods of cracking and crushing of the silicon are reviewed, and the shortcoming of these methods is also presented. With the advantage of high conductivity, high elastic, porous, high stability, polypyrrole compouded with silicon will be the most promising developing direction to improve the cycle stability of silicon-based anode materials in lithium-ion battery.