采用机械球磨制备了一定粒度的锂离子电池负极材料Co3O4. 电化学性能测试结果表明Co3O4首次嵌锂容量为990 mAh·g-1, 脱锂容量为395 mAh·g-1. 通过添加石墨类材料对Co3O4进行了改性研究. 充放电测试表明: 通过长时间机械混合球磨处理后的一定粒度的改性材料首次脱锂容量可提高到632 mAh·g-1, 充放电循环15周后, 容量保持在408 mAh·g-1, 电化学性能优于单纯的Co3O4. 由此可见通过添加石墨类材料并进行机械球磨以改变材料的微观结构不仅可以提高材料Co3O4的可逆容量, 而且改善了其循环寿命.
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