锂离子电池硅基负极材料研究进展

Research on the Silicon-Based Anode Material for Lithium Ion Battery

中文关键词:  硅  锂离子电池  负极材料  低维技术  复合技术

英文关键词:Si  Lithium-ion battery  Anode material  Lower-dimensional technique  Composite technique

中文摘要:

      硅是青海省储量丰富的资源之一,因其储锂容量高、安全性能优越,而成为锂离子电池理想的负极材料,但由于硅在深度嵌脱锂时体积效应大,易与导电介质、集流体失去电接触,造成电极循环性能迅速下降。对抑制其体积效应、增加其电导率的"低维化"和"复合化"两种技术进行了介绍。

英文摘要:

      Silicon is one of the main resources in Qinghai province.Due to the lower reactivity against electrolyte than lithium and the lower insertion/extraction potential for lithium ion,silicon is an ideal anode material for lithium-ion rechargeable batteries.However,the application of silicon has been hindered by severe volume change upon Li+ insertion and extraction which will cause poor cycling stability.To overcome the problems,two main approaches which can realize the alleviation of the severe volume change and the reduction of the charge transfer resistance of silicon have been reviewed.