A binder-free CF|PANI composite electrode with excellent capacitance for asymmetric supercapacitors  

作　　者：Kexin Li Gentian Yue Furui Tan 

机构地区：[1]Henan Key Laboratory of Photovoltaic Materials and Laboratory of Low-Dimensional Materials Science,Henan University,Kaifeng 475004,China

出　　处：《Journal of Semiconductors》2023年第3期95-103,共9页半导体学报（英文版）

基　　金：grateful to the joint support by NSFC(No.61704047).

摘　　要：In this work,carbon fiber and polyaniline(CF|PANI)composites are prepared by using an electrochemical polymeriza-tion method.The morphology and composition characterization results show that the PANI nanospheres are successfully syn-thesized and uniformly coated on the CF.When the electrodeposition period is 300 cycles,the as-prepared CF|PANI electrode ex-hibits good specific capacitance of 231.63 F/g at 1 A/g,high performance of 98.14%retention rate from 0.5 to 20 A/g,and excel-lent cycle stability with only 0.96%capacity loss after 1000 cycles.This is ascribed to the internal resistance that was signific-antly reduced without binders,which helps to the CF|PANI electrode maintains high operating potential and pseudo-capacit-ance performance at high current density.The symmetrical supercapacitor based on two CF|PANI electrodes connecting by acid-ic PVA-H2SO4 gel electrolyte exhibits an energy density of 6.55 W·h/kg at a power density of 564.37 W/kg.In addition,the asym-metric supercapacitor based on MoS2|MWCNTs and CF|PANI electrodes with neutral PVA-Na2SO4 gel electrolyte shows an en-ergy density of 16.12 W·h/kg at a power density of 525.03 W/kg.These results indicate that the low internal resistance contrib-utes to the high energy density of symmetrical supercapacitors and asymmetric supercapacitors at high current density and high power density,which is significant for its practical application.

关 键 词：quasi-solid state supercapacitor carbon fibers binder-free POLYANILINE 

分 类 号：TM53[电气工程—电器] O646.54[理学—物理化学]