Silicon/Carbon Composites as Anode Materials for Li-Ion Batteries
Silicon/Carbon Composites as Anode Materials for Li-Ion Batteries
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DOI：
10.1149/1.1795031
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发表时间：
2004-10
影响因子：
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通讯作者：
Yuh-Chang Liu;K. Hanai;Jun Yang;N. Imanishi;A. Hirano;Y. Takeda
中科院分区：
文献类型：
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作者：
Yuh-Chang Liu;K. Hanai;Jun Yang;N. Imanishi;A. Hirano;Y. Takeda
通过聚氯乙烯(PVC)的两次热解反应，结合中间高能机械球磨(HEMM)步骤，合成了硅/碳复合材料。作为锂存储主体，该复合材料在40次循环中表现出高达82%的初始库仑效率和约900mAhg-1的大容量。将锂离子注入水平控制在600mAHg-1，可以大大延长电池的循环时间，使循环时间延长到100以上。另一种由石墨和硅的混合物球磨后再经PVC热解工艺制备的复合材料也显示出良好的容量和容量保持率。
A silicon/carbon composite has been synthesized by two poly(vinyl chloride) (PVC) pyrolysis reactions, combined with an intervening high-energy mechanical milling (HEMM) step. As lithium storage host, the composite demonstrates high initial coulombic efficiency of 82% and a large capacity at ca. 900 mAh g - 1 over 40 cycles. Controlling Li-insertion level at 600 mAh g - 1 can greatly extend the cycles to over 100. Another composite prepared by ballmilling a mixture of graphite and silicon and followed by a PVC pyrolysis process also shows both good capacity and capacity retention.