包覆结构硅碳复合锂离子电池负极材料研究进展  

Progress in Research on the Coated Silicon-Carbon Composite Anode Materials for Lithium Ion Batteries

作　　者：任玉杰 安玉良[1] 隋孟珈 史锦程 REN Yu-jie;AN Yu-liang;SUI Meng-jia;SHI Jin-cheng(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》2022年第3期233-237,共5页Chemistry and Adhesion

基　　金：辽宁省自然科学基金项目:三明治结构石墨烯/氧化铁复合锂离子电池负极材料及储能机理研究(编号:201602653);科技部国际合作项目:某种特种材料制备及应用研究(编号:KJDR-2013-01L)。

摘　　要：锂离子电池中新型的硅基负极因其具有高理论容量、无污染、储量丰富等特点,被认为是取代石墨的新一代负极材料。但是硅在循环过程中存在体积变化大、电导率低及固体电解质膜不稳定等问题。为提高材料循环稳定性及导电性,先通过对硅基材料的储锂机制了解,再详细地介绍了不同的结构设计,如核壳结构、夹层结构及嵌入结构,这些结构设计可有效地改善材料在充放电过程体积膨胀效应,显著提高硅基材料电化学稳定性,并对硅碳负极材料和结构的发展趋势进行了简单展望。A new type of silicon-based anode material for lithium-ion batteries is considered as a new generation of anode material to replace the graphite because of its high theoretical capacity,pollution-free and abundant reserves.However,there are some problems such as the large volume change,the low conductivity and instability of solid electrolyte membrane.In order to improve the material cycle stability and electrical conductivity,the different structural design,such as core-shell structure and sandwich structure and embedded structure is introduced in detail based on the un-derstanding of the lithium storage mechanism of silicon materials,the structural design can effectively improve the volume expansion effect of the ma-terial in the process of charging and discharging,and significantly improve the electrochemical stability of silicon material.The development trend of silicon carbon anode materials and structures are briefly prospected.

关 键 词：包覆结构 硅碳 石墨 锂电池 

分 类 号：TM912[电气工程—电力电子与电力传动]