Microwave-Assisted Chemical-Vapor-Induced in Situ Polymerization of Polyaniline Nanofibers on Graphite Electrode for High-Performance Supercapacitor

作者：Li, Xiaoqin; Yang, Li; Lei, Ying; Gu, Li; Xiao, Dan^*

来源：ACS Applied Materials & Interfaces, 2014, 6(22): 19978-19989.

DOI：10.1021/am505533c

• polyaniline nanofibers
• microwave-assisted chemical vapor
• in situ polymerization
• supercapacitor

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(-1) at the current density of 1 A g(-1) 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(-1) and 6000 W kg(-1) respectively.

• 出版日期2014-11-26
• 单位四川大学