Microwave-Assisted Chemical-Vapor-Induced in Situ Polymerization of Polyaniline Nanofibers on Graphite Electrode for High-Performance Supercapacitor
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- 作者：Xiaoqin Li ; Li Yang ; Ying Lei ; Li Gu ; Dan Xiao
- 刊名：ACS Applied Materials & Interfaces
- 出版年：2014
- 出版时间：November 26, 2014
- 年：2014
- 卷：6
- 期：22
- 页码：19978-19989
- 全文大小：748K
- ISSN：1944-8252
文摘
Polyaniline (PANI) nanofibers-coated graphite electrode is fabricated by microwave-assisted chemical vapor induced in situ polymerization in the presence of ammonium persulfate. The microstructure and electrochemical performance of the as-prepared nanofibers are investigated in detail. The obtained PANI nanofibers at the optimum volume ratio of 4% aniline, with some protuberances on the surface and the diameter from 50 to 100 nm, are coated onto the surface of graphite electrode. The PANI-coated graphite electrodes display the best electrochemical performance in 6 M H2SO4 electrolyte, including a large reversible capacity of 2136 F g鈥? at the current density of 1 A g鈥? and excellent rate capability. In particular, The PANI-coated graphite electrode exhibits a long cycle life by retaining 91% of the initial specific capacitance after 1000 cycles. More importantly, a symmetric supercapacitor was fabricated using PANI-coated graphite electrode, showing maximum energy density and power density of 24 Wh kg鈥? and 6000 W kg鈥?, respectively.