Synthesis and characterization of nanosize cobalt sulfide for rechargeable lithium batteries
Synthesis and characterization of nanosize cobalt sulfide for rechargeable lithium batteries
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DOI：
10.1016/j.jpowsour.2006.04.092
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发表时间：
2006-09
影响因子：
9.2
通讯作者：
Jiazhao Wang;S. Ng;Guoxiu Wang;Jun Chen;Long Zhao;Yun Chen;Huakun Liu
中科院分区：
文献类型：
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作者：
Jiazhao Wang;S. Ng;Guoxiu Wang;Jun Chen;Long Zhao;Yun Chen;Huakun Liu
采用一步化学反应法在室温下合成了纳米硫化钴。采用X射线衍射、X射线能谱、扫描电镜和电化学测试等手段对硫化钴纳米粉体进行了表征。结果表明，硫化钴是一种半导体，其可逆容量随电极活性物质中导电体含量的增加而增加。将所制备的样品与10wt.%炭黑和10重量%聚吡咯（PPy）粉末作为电子导体显示出最好的电化学性能，基于电极的总质量，可逆容量超过300mAhg− 1。硫化钴纳米粉末作为锂可充电电池的阴极活性材料显示出希望。
Nanosize cobalt sulfides were synthesized through a one step chemical reaction method at room temperature. The cobalt sulfide nanopowders were characterized by X-ray diffraction, energy dispersive X-ray spectroscopy, scanning electron microscopy and electrochemical testing. The results revealed that the cobalt sulfide is a semiconductor; the reversible capacity is increased with increasing content of electronic conductors in the active material of electrodes. The as prepared sample with 10wt.% carbon black and 10wt.% polypyrrole (PPy) powder as electronic conductors shows the best electrochemical properties, with a reversible capacity of over 300mAhg−1based on the total mass of the electrode. Cobalt sulfide nanopowders show promise as cathode active materials for lithium-rechargeable batteries.