Polymer鈥揋raphene Nanocomposites as Ultrafast-Charge and -Discharge Cathodes for Rechargeable Lithium Batteries

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• 作者：Zhiping Song ; Terrence Xu ; Mikhail L. Gordin ; Ying-Bing Jiang ; In-Tae Bae ; Qiangfeng Xiao ; Hui Zhan ; Jun Liu ; Donghai Wang
• 刊名：Nano Letters
• 出版年：2012
• 出版时间：May 9, 2012
• 年：2012
• 卷：12
• 期：5
• 页码：2205-2211
• 全文大小：465K
• 年卷期：v.12,no.5(May 9, 2012)
• ISSN：1530-6992

文摘

Electroactive polymers are a new generation of 鈥済reen鈥?cathode materials for rechargeable lithium batteries. We have developed nanocomposites combining graphene with two promising polymer cathode materials, poly(anthraquinonyl sulfide) and polyimide, to improve their high-rate performance. The polymer鈥揼raphene nanocomposites were synthesized through a simple in situ polymerization in the presence of graphene sheets. The highly dispersed graphene sheets in the nanocomposite drastically enhanced the electronic conductivity and allowed the electrochemical activity of the polymer cathode to be efficiently utilized. This allows for ultrafast charging and discharging; the composite can deliver more than 100 mAh/g within just a few seconds.

Keywords:

Lithium battery; cathode; polymer; graphene; nanocomposite