不同氧化剂制备的聚苯胺/中间相炭微球复合物电化学性能研究  

Study on electrochemical performance of polyaniline/mesocarbon microbeads composite prepared by different oxidizing agent

作　　者：何明基 钟新仙 黄寒星 王红强 毛全元 李庆余 

机构地区：[1]广西师范大学化学与药学学院省部共建药用资源化学与药物分子工程国家重点实验室广西低碳能源材料重点实验室,广西桂林541004

出　　处：《功能材料》2017年第10期10126-10129,10136,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(U1401246;51474110);中国博士后科学基金资助项目(2014M562499XB)

摘　　要：室温下,以二氧化锰和过硫酸铵为氧化剂,采用原位化学聚合法合成聚苯胺/中间相炭微球(PANI/MCMB)复合物。采用场发射扫描电镜(FE-SEM)和X射线粉末衍射(XRD)对其形貌结构进行表征。以PANI/MCMB复合物为电极活性物质,1.0mol/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)、恒流充放电等测试手段测试超级电容器的电化学性能。结果表明,以二氧化锰为氧化剂制备的聚苯胺/中间相炭微球复合物(MPANI/MCMB),在电流密度为0.1A/g时,单电极比容量为336.4F/g。1 000次循环后比容量保持率为92.3%,比以过硫酸铵为氧化剂制备的聚苯胺/中间相炭微球复合物(NPANI/MCMB)具有更好的循环性能和更高的比容量。In this work, polyaniline/mesocarbon microbeads （PANI/MCMB） composite was prepared by situ chemical polymerization in room tempetarure, using manganese dioxide or ammonium persulfate as oxidizing agents, respectively. Field emission scanning electron microscope （FE-SEM） and X-ray powder diffraction （XRD） were carried out to characterize the structure and morphology of PANI/MCMB composite. Symmetric redox supercapacitor was assembled with PANI/MCMB composite as active electrode material and 1.0 mol/L H2 SO4 aqueous solution as electrolyte. The electrochemical characteristics of these supercapacitors were investigated by cyclic voltammetry （CV）, electrochemical impedance spectroscopy （EIS） and galvanostatic charge/discharge tests. These results show that single specific capacitance of MPANI/MCMB composite electrode prepared by manganese dioxides is 336.4 F/g in current density for 0.1 A/g, which is higher than NPANI/MCMB electrode prepared by ammonium persulfate. After 1 000 charge/discharge cycles, the capacity retention of MPANI/MCMB composite is 92.3 %, which is better than NPANI-MCMB electrode materials.

关 键 词：超级电容器 聚苯胺 中间相炭微球 

分 类 号：TQ050.425[化学工程]