包覆硅碳复合锂电池负极材料研究  

Encapsulation of Silicon-carbon Anode Materials for Lithium-ion Batteries

作　　者：栾厚成 孙超群 安玉良[1] 谢驰 孔汉文 LUAN Houcheng;SUN Chaoqun;AN Yuliang;XIE Chi;KONG Hanwen(School of Material Science and Engineering,Shenyang Ligong University,Shenyang 110159,China)

机构地区：[1]沈阳理工大学材料科学与工程学院,辽宁沈阳110159

出　　处：《化学与粘合》2025年第2期136-137,158,共3页Chemistry and Adhesion

基　　金：辽宁省百千万人才项目(编号:2021921035);沈阳理工大学材料加工工程重点学科开放基金(编号:20210302)。

摘　　要：采用酚醛树脂作为碳源对硅进行预包覆处理,将预包覆硅颗粒与石墨电极粉料球磨混合,制备出硅碳复合负极材料。通过XRD和SEM对硅碳复合负极材料进行结构形貌表征,结果表明负极材料具有良好的分散性,硅颗粒均匀镶嵌在石墨颗粒表面,此结构可以缓解体积硅颗粒的膨胀效应;通过电化学性能测试,结果表明引入包覆改性处理工艺后,硅碳复合负极材料的循环稳定性有所提升,30次循环后,可逆容量为363.7 m Ah·g^(-1)。The phenolic resin is used as the carbon source to encapsulate silicon,and then as-coated silicon is mixed with the crushed graphite electrode powder to prepare silicon-carbon composite anode materials.The structure and morphology of silicon-carbon composite anode materials are characterized by XRD and SEM.The results show that the silicon particles uniformly distribute on the surface of graphite with good dispersion which can effectively alleviate the volume expansion effect.The results of electrochemical performance test demonstrate that the cyclic stability of the silicon-carbon composite anode material is improved,and the reversible capacity is 363.7 mAh·g^(-1) after 30 cycles by encapsulation modification process.

关 键 词：负极材料 包覆改性 硅碳复合 

分 类 号：TM912.9[电气工程—电力电子与电力传动]