Effect of polypyrrole on improving electrochemical performance of silicon based anode materials

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• 作者：Xiang-yang Zhou^a ; Jing-jing Tang^a ; Juan Yang^a ; ^b ; ^{j-yang@csu.edu.cn} ; You-lan Zou^a ; Song-can Wang^a ; Jing Xie^a ; Lu-lu Ma^a
• 关键词：Polypyrrole nano-wires ; Polypyrrole micro-particles ; Silicon anode materials ; Lithium ion batteries
• 刊名：Electrochimica Acta
• 出版年：2012
• 期刊代码：30_00134686
• 类别：ch
• 出版时间：30 May, 2012
• 卷：70
• 期：Complete
• 页码：296-303
• 文件大小：1727 K

摘要

Silicon and polypyrrole composites with different microstructures of polypyrrole were synthesized using high-energy mechanical milling. The nano-wires polypyrrole and micro-particles polypyrrole act as a matrix to hold the active silicon grains as they repeatedly alloy with lithium during the operation of a lithium ion battery. The composite containing 10 wt.%polypyrrole nano-wires exhibits a relative better reversibility and cycle life than bare silicon, while the silicon/micro-particles polypyrrole composite shows no improvement.