化工学报2024，Vol.75Issue(z1)：300-308,9.DOI:10.11949/0438-1157.20240331
固定床法制备锂离子电池硅碳负极材料及其储锂性能研究
Preparation of silicon carbon anode for lithium-ion batteries by fixed bed and lithium storage properties
吴德威 1汪郑鹏 1周玥 1李晓宁 1陈招 1李卓 1刘成伟 1李学刚 1肖文德1
作者信息
- 1. 上海交通大学化学化工学院,上海 200240
- 折叠
摘要
Abstract
Utilizing conductive carbon black as the substrate and SiH4 as the silicon source precursor,silicon-carbon composite anode material were prepared for lithium-ion batteries via a fixed bed CVD reactor.Two schemes were studied:sole deposition of SiH4 and its co-deposition with C2H4.Additionally,the impact of carbon encapsulation using C2H4 as the carbon source on the lithium storage performance was investigated.The experimental results reveal that sole SiH4 deposition yields smaller Si nanoparticles,with a reduction in Si loading as the deposition temperature increases.During the co-deposition of SiH4 and C2H4,C@SiC composite structure is formed,and the crystallinity and grain size of elemental silicon decrease with the increase of C2H4 proportion.Under the co-deposition of SiH4/C2H4 and C2H4 carbon coating conditions,a composite structure featuring coexistent Si,SiC,and C crystals is observed,enhancing sample material cycling performance albeit with a notable decrease in capacity.关键词
固定床/气相沉积法/锂离子电池/硅碳负极/复合材料/电化学Key words
fixed bed/vapor deposition method/lithium-ion batteries/silicon carbon anode/composite material/electrochemistry分类
化学化工引用本文复制引用
吴德威,汪郑鹏,周玥,李晓宁,陈招,李卓,刘成伟,李学刚,肖文德..固定床法制备锂离子电池硅碳负极材料及其储锂性能研究[J].化工学报,2024,75(z1):300-308,9.
