高性能锂离子电池SiO/C复合负极材料研究  

High-performance SiO/C Composite Anode Material for Lithium Ion Battery

作　　者：余德馨[1] 杨学林[1] 石长川[1] 张鹏昌[1] 

机构地区：[1]三峡大学机械与材料学院,湖北宜昌443002

出　　处：《三峡大学学报（自然科学版）》2011年第5期80-83,共4页Journal of China Three Gorges University：Natural Sciences

基　　金：国家自然科学基金项目(50972075);教育部科学技术研究重点项目(209083);湖北省教育厅产学研合作重大项目(CXY2009A004)

摘　　要：以SiO为硅源,柠檬酸为碳源,通过高能球磨和高温热解制备了一种循环性能优异的锂离子电池SiO/C复合负极材料.采用X-射线衍射仪(XRD)、扫描电子显微镜(SEM)对复合材料的物相和形貌进行了表征.具有孔状结构的柠檬酸热解碳对纳米SiO不仅具有良好的包覆效果,也能有效缓冲电化学嵌脱锂过程中硅颗粒释放出来的体积变化.电化学性能测试表明,SiO/C复合负极材料电极循环100次后容量仍高达803.1mA.h/g,容量保持率为89%.SiO/C composite anode material with high capacity,high cycling stability for lithium ion battery is synthesized by high-energy mechanical milling and subsequent heat treatment using silicon-monoxide and citric acid as raw materials.The phase composition and micro morphology of the composite material are investigated by the X-ray diffractometer（XRD） and scanning electron microscope（SEM）,indicating nano-sized SiO particles was coated by pyrolytic carbon with porous feature.SiO/C composite electrode presents excellent electrochemical performance with reversible capacity as high as 803.1 mA·h/g and capacity retention rate of 89% after 100 cycles.

关 键 词：一氧化硅 柠檬酸 负极 锂离子电池 

分 类 号：O613.72[理学—无机化学] TM912.9[理学—化学]