摘要
本文以活性中间相炭微球为基底,过硫酸铵(APS)为氧化剂,通过原位化学聚合法聚合苯胺,得到聚苯胺/活性中间相炭微球复合材料(PANI/A-MCMB),采用扫描电子显微镜(SEM)、X-射线衍射仪(XRD)对其形貌和结构进行表征。以PANI/A-MCMB复合物为电极活性物质,1.0 mol/L H_2SO_4水溶液为电解液,组装对称型超级电容器,用循环伏安法(CV)、电化学交流阻抗(EIS)、恒流充放电(GCD)等测试手段测试超级电容器的电化学性能。实验结果表明,电流密度恒为0.1A/g时,PANI/A-MCMB复合材料单电极比容量为301.6F/g,1 000次循环后比容量为276.3F/g,比电容保持率为91.6%,较PANI材料(比容量为228F/g,1 000次循环后比电容保持率为39.5%)具有更好的比容量和循环稳定性。
In this paper,polyaniline/activated mesocarbon microbeads（PANI/A-MCMB）composite material was obtained through in-situ chemical polymerization of aniline by using activated mesocarbon microbeads（MCMB）as substrate and ammonium peroxydisulfate（APS）as oxidizing agent.The morphology and structure of prepared PANI/A-MCMB composite material was characterized by scanning electron microscope（SEM）and X-ray diffraction（XRD）.A symmetric redox supercapacitor was assembled with PANI/A-MCMB composite as active electrode material and 1.0 mol/L H2SO4 aqueous solution as electrolyte, and the electrochemical properties of this PANI/A-MCMB supercapacitor were investigated by cyclic voltammetry（CV）,electrochemical impedance spectroscopy（EIS）and galvanostatic charge/discharge tests.The experimental results show that the single specificcapacitance of PANI/A-MCMB composite materials is 301.6 F/g at current density for 0.1 A/g,the specific capacitance is 276.3 F/g and the capacity retention is 91.6% after 1 000 charge/discharge cycles.PANI/A-MCMB composite materials have higher specific capacity and better cyclic stability than PANI electrode materials whose single specific capacitance of PANI is only 228 F/g and the capacity retention is 39.5% after 1 000 charge/discharge cycles.
出处
《广西师范大学学报（自然科学版）》
CAS
北大核心
2017年第4期84-90,共7页
Journal of Guangxi Normal University:Natural Science Edition
基金
中国博士后科学基金(2014M562499XB)
国家自然科学基金(U1401246
51474110)
关键词
聚苯胺
中间相炭微球
原位化学聚合法
超级电容器
polyaniline
mesocarbon microbeads
in-situ chemical polymerization
supercapacitor
作者简介
通信联系人：钟新仙（1973-），女，湖南新邵人，广西师范大学教授，博士。E—mail：zhongxx2004@163．com
