刘文平.纳米Si粉在高容量锂离子电池负极中的应用研究[J].有色金属工程,2018,8(2):59-63.
纳米Si粉在高容量锂离子电池负极中的应用研究
The application research of nano Si powers in high capacity lithium ion battery cathodeLIU Wen-ping1,2,3,QIN Hai-qing1,2,3, LEI Xiao-xu1,2,3,LIN Feng1,2,3, ZHANG Zhen-jun1,2,3, ZHAO Jun-wei4
投稿时间:2017-09-21  最后修改时间:2017-11-14
DOI:10.3969/j.issn.2095-1744.2018.02.012
中文关键词:  纳米Si粉  锂离子电池  复合负极材料  电化学性能
英文关键词:nano Si powers  lithiumion battery  composite anode materials  electrochemical properties
基金项目:1.桂林市科技攻关项目(2016010706)2.桂林市“1020”创新驱动计划重大攻关项目(20160204);3. 中国有色集团科技计划项目(2016KJJH03)4. 广西区直科技型企业科研成果转化资金项目(桂科成 2016251016)
  
作者单位
刘文平 中国有色桂林矿产地质研究院有限公司
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中文摘要:
      通过感应等离子体蒸发凝聚法制备纳米Si粉,以葡萄糖为有机碳源经过高温碳化将纳米Si粉钉扎在石墨为载体表面制备Si/C复合负极材料,对比分析了纳米Si粉,石墨载体和Si/C复合负极材料的性能变化。电化学性能测试表明,纳米Si粉作为锂离子电池负极材料首次放电容量和可逆充电容量分别为3519.4 mAh/g和2063.7mAh/g,但是首次效率只有58.6%,且循环寿命差,Si/C复合负极材料能够有效缓冲纳米Si粉的体积变化,发挥较高的可逆储锂容量,提高循环寿命,但是需进一步改善首次效率。
英文摘要:
      The nano Si powers are prepared by radio frequency inductively coupledSplasma evaporation method. Si/C composite cathode materials are prepared through nano Si powersSloading on the surface of the graphite, which is used glucose as organic carbon source by high temperature carbonization. The performance changes of Si powder, graphite carrier and Si/C composite cathode materials areScontrastivelySanalyzed. From electrochemical performance tests,Sit can be found that the firstly discharge capacity and reversible charge capacity of nano Si powers are 3519.4 mAh/g and 2063.7 mAh/g respectively, which are used as lithium ion battery anode materials, butSthe first efficiency is only 58.6% and cycle life is bad. Si/C composite cathode materials can effectively buffer volume change of nano Si powers, which have higher reversible lithium storage capacity and better cycle life, but the first efficiency need to improve.
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