Carbon nanotube-polypyrrole core-shell sponge and its application as highly compressible supercapacitor electrode

作     者：Peixu Li Enzheng Shi Yanbing Yang Yuanyuan Shang Qingyu Peng Shiting Wu Jinquan Wei Kunlin Wang Hongwei Zhu Quan Yuan Anyuan Cao Dehai Wu 

作者机构：Department of Mechanical Engineering Tsinghua University Beijing 100084 China Department of Materials Science and Engineering College of Engineering Peking University Beijing 100871 China Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education) College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 China Key Laboratory for Advanced Materials Processing Technology and School of Materials Science and Engineering Tsinghua University Beijing 100084 China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2014年第7卷第2期

页      面：209-218页

核心收录：

学科分类：080801[工学-电机与电器] 081704[工学-应用化学] 0808[工学-电气工程] 08[工学] 0817[工学-化学工程与技术] 

基　　金：This work was supported by the National Natural Science Foundation of China (NSFC  No. 91127004) and the Beijing City Science and Technology Program (No. Z121100001312005) 

主　　题：carbon nanotube sponge polypyrrole core-shell configuration compressible electrode supercapacitor 

摘      要：A carbon nanotube （CNT） sponge contains a three-dimensional conductive nano- tube network, and can be used as a porous electrode for various energy devices. We present here a rational strategy to fabricate a unique CNT@polypyrrole （PPy） core-shell sponge, and demonstrate its application as a highly compressible supercapacitor electrode with high performance. A PPy layer with optimal thickness was coated uniformly on individual CNTs and inter-CNT contact points by electrochemical deposition and crosslinking of pyrrole monomers, resulting in a core-shell configuration. The PPy coating significantly improves specific capacitance of the CNT sponge to above 300 F/g, and simultaneously reinforces the porous structure to achieve better strength and fully elastic structural recovery after compression. The CNT@PPy sponge can sustain 1,000 compression cycles at a strain of 50% while maintaining a stable capacitance （〉 90% of initial value）. Our CNT@PPy core-shell sponges with a highly porous network structure may serve as compressible, robust electrodes for supercapacitors and many other energy devices.