A novel network composite cathode of LiFePO₄/multiwalled carbon nanotubes with high rate capability for lithium ion batteries

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• 作者：Xinlu Li ; Feiyu Kang ; Xinde Bai ; Wanci Shen
• 刊名：Electrochemistry Communications
• 出版年：2007
• 期刊代码：29_13882481
• 类别：ch
• 出版时间：April 2007
• 卷：9
• 期：4
• 页码：663-666
• 文件大小：717 K

摘要

A novel network composite cathode was prepared by mixing LiFePO₄ particles with multiwalled carbon nanotubes for high rate capability. LiFePO₄ particles were connected by multiwalled carbon nanotubes to form a three-dimensional network wiring. The web structure can improve electron transport and electrochemical activity effectively. The initial discharge capacity was improved to be 155 mA h/g at C/10 rate (0.05 mA/cm²) and 146 mA h/g at 1C rate. The comparative investigation on MWCNTs and acetylene black as a conducting additive in LiFePO₄ proved that MWCNTs addition was an effective way to increase rate capability and cycle efficiency.