摘要
为满足可穿戴电子设备日益提升的要求,低成本、高性能柔性超级电容器成为研究的热点。在玉米苞叶纤维(CHF)基材表面原位生长聚苯胺(PANI),继而以聚乙烯醇/硫酸(PVA/H_(2)SO_(4))作为凝胶,通过简单的冻融法制备聚苯胺-玉米苞叶纤维柔性自支撑电极(PANI-CHF-GEL)。PANI-CHF-GEL显示出优异的力学性能(断裂强度为259 kPa,断裂伸长率为121%)和较好的韧性(断裂能为0.167 MJ·cm^(-3))。采用PVA/H_(2)SO_(4)凝胶作为电解质组装得到的PANI-CHF-GEL//PANI-CHF-GEL对称固态超级电容器具有优越的电化学储能性能:在3.00 mA·cm^(-2)的电流密度下,面积比电容高达1789.74 mF·cm^(-2),功率密度为0.34 mW·cm^(-2),能量密度为3.51 mW·h·cm^(-2)。此外,该器件还显示出良好的柔性,弯曲90°时仍能保持其初始性能,表明了其在可穿戴电子设备潜在的应用前景。
In order to meet the increasing requirements of wearable electronic devices,low-cost,high-performance flexible supercapacitors have become a research hotspot.In this work,flexible,self-standing PANI-CHF-GEL electrode was obtained by growing polyaniline(PANI)on the surface of corn husk fiber(CHF)and mixed with polyvinyl alcohol/sulfuric acid(PVA/H_(2)SO_(4))gel,followed by a facile frozen-thawing method.PANI-CHF-GEL exhibits excellent mechanical properties(a fracture strength of 259 kPa at a fracture strain of 121%)and good toughness(a fracture energy of 0.167 MJ·cm^(-3)).Employing PVA/H_(2)SO_(4) as the gel electrolyte,the symmetric PANI-CHFGEL//PANI-CHF-GEL solid supercapacitor delivers an areal capacitance of 1789.74 mF·cm^(-2),a power density of 0.34 mW·cm^(-2),and a corresponding energy density of 3.51 mW·h·cm^(-2)(@3.00 mA·cm^(-2)).Moreover,the device retains its original properties even bent 90°,indicating its promise potentials for wearable electronics.
作者
韦会鸽
李桂星
雷祥楠
彭紫芳
孔德硕
万同
WEI Huige;LI Guixing;LEI Xiangnan;PENG Zifang;KONG Deshuo;WAN Tong(Green Energy Laboratory,Department of Chemical Engineering and Materials Science,Tianjin University of Science and Technology,Tianjin 300457,China)
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2022年第7期3462-3468,共7页
Acta Materiae Compositae Sinica
基金
国家自然科学基金(51703162)
天津市青年人才托举工程(TJSQNTJ-2018-03)。
关键词
玉米苞叶纤维
聚苯胺
复合材料
柔性
自支撑
固态超级电容器
电化学
corn husk fiber
polyaniline
composites
flexibility
self-standing
solid supercapacitor
electro-chemical
