摘要
Graphene fibers(GFs)are ideal electrodes for f ibrous supercapacitors because of their excellent mechanical and electrical properties.However,the actual specific s urface area(SSA)of GFs is low due to the restacking of g raphene sheets,which limits the capacitance enhancement o f GFs.One of the effective ways to increase the SSA of GFs is to construct a porous fiber structure,but it disrupts t he conductive pathway and adversely affects the electrochemical(EC)performance of GFs.Therefore,a wet-spun porous GF electrode coated with polypyrrole(PPy)was reported in this paper.The resulting electrode exhibits an areal specific capacitance of 31.25 mF·cm^(-2)and a good c ycling stability with a capacitance retention rate of 95%after 5000 charge/discharge cycles.These indicate that porous structures and PPy coating can synergistically improve the EC performance of GFs.
作者
向睿芳
陈馨逸
刘岩
张坤
陆春红
XIANG Ruifang;CHEN Xinyi;LIU Yan;ZHANG Kun;LU Chunhong(Shanghai Frontiers Science Center of Advanced Textiles,Donghua University,Shanghai 201620,China;College of Textiles,Donghua University,Shanghai 201620,China)
基金
National Natural Science Foundation of China(No.51903033)
Shanghai Sailing Program,China(No.19YF1400800)。