MnO_2/聚苯胺复合材料的电化学电容  

Electrochemical Capacitance of MnO_2 /PANI Composite

作　　者：徐小存[1] 刘开宇[1] 殷志刚[1] 孙哲[1] 苏耿[1] 

机构地区：[1]中南大学化学化工学院,湖南长沙410083

出　　处：《电化学》2010年第1期96-101,共6页Journal of Electrochemistry

基　　金：国家自然科学基金(No.20376086);湖南省科技计划重点项目(No.2008GK2008)资助

摘　　要：以P123为模板剂,软模板法制备出纳米MnO2.酸性条件下引入苯胺并聚合,得到了MnO2/聚苯胺复合材料.X射线衍射(XRD)、红外光谱(IR),扫描电子显微镜(SEM)表征观察样品的结构、形貌.循环伏安、交流阻抗、恒电流充放电等测试MnO2/聚苯胺电极的电化学性能.结果表明:引入苯胺改变了样品纳米MnO2的形貌.MnO2/聚苯胺电极比容量高达190.8F·g-1,500次循环电极比容量仅衰减4.7%,库仑效率均保持在97%以上.Nano-MnO2 was prepared by using P123 as a soft template. The MnO2/polyaniline composite was further prepared by polymerization of aniline with the nano-MnO2 in acidic conditions and was investigated by XRD and IR. The morphology of nano-MnO2 observed by SEM was changed with the introduction of aniline. The electrochemical properties of MnO2/PANI electrode were investigated using cyclic voltammetry, galvanostatic charge-discharge and electrochemical impedance spectroscopy. The specific capacitance of MnO2/PANI electrode could reach as high as 190.8 F·g^-1, which decayed only 4.7% over 500 cycles. And the coulombic efficiency has been maintained at above 97 %.

关 键 词：MNO2 聚苯胺 复合材料 超级电容器 电化学性能 软模板 

分 类 号：TM53[电气工程—电器]