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551.5mAldg,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.
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