Sn/石墨/无定形碳材料的合成及性能研究  

Research of Sn/graphite/amorphous carbon composite for lithium-ion batteries

作　　者：肖彩英[1] 刘红光[1] 叶学海[1] 张晓波[1] 夏继平[1] 

机构地区：[1]中海油天津化工研究设计院,天津300131

出　　处：《电源技术》2012年第6期795-797,共3页Chinese Journal of Power Sources

摘　　要：采用水热法引入无定形碳,并通过碳热还原合成了Sn/石墨/无定形碳样品。通过X射线衍射法(XRD)和扫描电子显微镜法(SEM)以及充放电测试等方法对形貌、结构和电化学性能进行表征,研究结果表明:无定形碳材料的引入对改善Sn材料的循环性能效果显著,所制备的复合材料样品具有以Sn为中心、无定形碳包围、石墨填充的类核壳的结构,首次可逆比容量为533.2 mAh/g,50次循环之后仍然保持有81.4%的容量。The modified Sn/graphite/amorphous carbon compound materials were obtained by hydrothermal process. The SEM, XRD and electrochemical test results indicate that the Sn/graphite/amorphous carbon sample has a kind of nuclear shell structure in which Sn is the center, amorphous carbon surrounding and the graphite filling. The compound materials have good cycle life, and after 50 cycles, the capacity retention is 81.1%.

关 键 词：锡 石墨 无定形碳 锂离子电池 负极材料 水热合成 

分 类 号：TM912.9[电气工程—电力电子与电力传动]