锂离子电池负极用碳/硅复合材料的研究进展

Research Progress on Carbon/Silicon Composite Materials for Lithium Ion Battery Anode

硅(Si)因具有资源丰富、理论容量高、绿色环保等优点成为世界上最具有前景的锂离子电池负极材料之一。但硅的导电性能差,且在合金化/去合金化过程中会发生剧烈的体积膨胀导致电池循环稳定性严重下降。碳材料(C)导电性能优异且结构稳定。将C和Si进行复合,可得到容量高且循环性能好的锂离子电池负极材料。本综述从材料的制备方法着手,总结了锂离子电池C/Si复合负极材料的最新研究进展,探讨了制备方法、材料结构对C/Si复合负极材料储锂性能的影响。

Silicon(Si)has become one of the most promising anode materials of lithium-ion batteries in the world due to its rich resources,high theoretical capacity and environmental protection.However,silicon has poor electrical conductivity,and severe volume expansion occurs during the alloying/dealloying process,resulting in a serious decrease in battery cycle stability.The carbon material(C)has excellent electrical conductivity and stable structure.Combining C and Si can obtain a lithium ion battery anode material with high capacity and good cycle performance.Started with the preparation methods of materials,the latest research progress on C/Si composite anode materials for lithium-ion batteries was summarized,and the influence of preparation methods and material structure on the lithium storage performance of C/Si composite anode materials were discussed.