张宁,于维平

• 1:北京航空航天大学工程训练中心

摘要(Abstract)：

采用电沉积法把Sn、Co原子沉积在硬碳颗粒上得到Sn-Co-C复合负极材料,然后球磨。XRD分析表明复合粉体由Sn、Co2C、CoSn2和C组成。电子探针测试表明试样中Sn、Co、C原子分数分别为2.9145%,0.6921%,95.3879%。SEM观察显示,锡钴粒子尺寸为50～100nm,沉积在片状的硬碳颗粒上。试样与锂片组成模拟电池,首次放电比容量为551.5mAh/g,充电比容量为309.4mAh/g。循环50次后放电比容量仍保持在319.6mAh/g,充电比容量保持在281.6mAh/g。交流阻抗测试表明,在第一次放电后形成了固体电解质层膜,但循环一次后消失。

关键词(KeyWords)： 电沉积;球磨;Sn-Co-C;负极材料;锂离子电池

Abstract:

Keywords:

基金项目(Foundation): 国家高新技术研究发展计划(2006AA03Z230)

作者(Author): 张宁,于维平

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