摘要
采用化学还原法得到纳米级Sn-Co粉末,再经过与硬碳粉混合球磨得到Sn-Co-C复合粉体.复合粉体与锂片组成模拟电池,首次放电比容量为558.4 mAh/g,首次充电比容量为338.5 mAh/g;循环30次后,放电比容量保持在348.2 mAh/g,保持率为62.4%;充电比容量保持在335.4 mAh/g,保持率为99.1%.充放电比容量较硬碳提高3倍左右.
Sn -Co- C compound powder in which Sn and Co are atoms, is prepared by chemical reduction and ball milling. The simulation cell consists of Sn - Co - C compound powder and Li piece. The initial discharge specific capacity was 558.4 mAh/g and remained to be 348.2 mAh/g after 30 cycles. The initial charge specific capacity was 338.5 mAh/g and remained to be 335.4 mAh/g after 30 cycles. The charge - discharge specific capacity is about 3 times higher than that of the hard carbon electrode.
出处
《华南师范大学学报（自然科学版）》
CAS
北大核心
2009年第A02期79-80,91,共3页
Journal of South China Normal University(Natural Science Edition)
基金
国家高技术研究发展计划资助项目(2006AA03Z230)
北京市自然科学基金资助项目(2062014)
关键词
化学还原
球磨
Sn—Co—C
负极材料
锂离子电池
chemical reduction
ball milling
Sn - Co - C
negative material
Li - ion batteries
