【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.更多还原

【Abstract】 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.更多还原