摘要
以纳米硅粉、有机物碳源及石墨为原料制备Si/C复合负极材料,用SEM和XRD测试分析材料的形貌和结构,并研究复合材料制成不同厚度负极片的电化学性能。纳米硅颗粒均匀分散在低体积效应的石墨中,石墨和硅材料在复合材料中无形态转变,属于物理复合;极片厚度为100μm时,电极的电化学性能最好,以100 m A/g在0.005~1.500 V恒流充放电,首次库仑效率达到94.1%,循环50次的容量保持率为90.6%。
The silicon（Si）/carbon（C） composite anode material was prepared with nano silicon powder, organic carbon source and graphite as raw materials. The morphology and structure of the composites were analyzed by SEM and XRD tests. The electrochemical performance of composite material with different thickness made by anode was studied. The results showed that the nano silicon particles were uniformly dispersed in the low volume effect of graphite, graphite and silicon materials hadn＇ t morphology changed, which was belong to physical composite in composite materials. The electrode had the best electrochemical performance when the electrode thickness was 100 μm. When galvanostatic charged-discharged at 100 mA/g in 0. 005 -1. 500 V, the initial Coulombic efficiency was up to 94. 1% ,the capacity retention rate was 90. 6% after 50 cycles.
作者
雷晓旭
秦海青
王立惠
卢宗柳
LEI Xiao-xu;QIN Hai-qing;WANG Li-hui;LU Zong-liu(China Nonferrous Metal （Guilin） Geology and Mining Co., Ltd., National Engineering Research Center for Special Mineral Material, Guangxi Key Laboratory of Superhard Material, Guilin, Guangxi 541004, China)
出处
《电池》
CAS
CSCD
北大核心
2018年第3期167-170,共4页
Battery Bimonthly
基金
桂林市科技攻关项目(2016010706),桂林市“1020”创新驱动计划重大攻关项目(20160204),中国有色集团科技计妯项目(2016KJJH03),广西科技重大专项(桂科AA17204022)
关键词
Si/C复合材料
极片厚度
锂离子电池
电化学性能
silicon（Si）/carbon（C） composite
electrode thickness
Li-ion battery
electrochemical performance
