摘要
Abstract
As one of the most promising lithium ion anode battery materials,silicon-based materials have high theoretical specific capacity and excellent fast charging performance,which meets the development needs of new energy vehicles.How-ever,due to the serious expansion of the volume during the lithium insertion/extraction process,the structure of the elec-trode material is destroyed,and then the phenomenon of pulverization and shedding occurs,which restricts the commercial application of the material.Some scholars have proposed that if the two materials of carbon and silicon are combined,the anode material with high capacity,good electrical conductivity and cycle performance can be obtained.In this paper,the lithium storage mechanism of silicon-based anode is analyzed.The core-shell structure,yolk-shell structure,porous structure and embedded structure of silicon-carbon anode composites are briefly summarized,and the characteristics of different structures are analyzed.Finally,the future research and low-cost industrial development of silicon-carbon anode composites are prospected.关键词
锂离子电池/硅碳负极/复合结构/比容量Key words
Lithium-ion battery/Silicon-carbon anode/Composite structure/Specific capacity分类
化学化工
