不同氧化剂制备的聚苯胺电化学性能研究  

Electrochemical performance of polyaniline prepared by different oxidizing agent

作　　者：钟新仙[1] 王芳平[1] 李庆余[1] 胡兴艳[1] 卢胜彬[1] 王红强[1] 

机构地区：[1]广西师范大学化学化工学院,广西桂林541004

出　　处：《电源技术》2009年第9期781-783,818,共4页Chinese Journal of Power Sources

基　　金：广西青年科学基金项目(桂科青0832025)

摘　　要：以二氧化锰、过硫酸铵作为氧化剂,采用化学原位聚合法在室温下制备得到聚苯胺,并采用扫描电子显微镜(SEM),傅里叶变换红外光谱(FTIR)以及X-射线衍射(XRD)对其结构和形貌进行了表征。用循环伏安法、电化学阻抗和恒电流充放电技术测试了以其作为电极的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(简称为M-PANI)在电流密度为5mA/cm2下的单电极比电容达260F/g,300次循环后比电容仍有204F/g,比以过硫酸铵作为氧化剂制备的聚苯胺(简称为N-PANI)具有更好的循环性能和更高的比容量。Polyaniline was prepared by chemical in-situ polymerization at ambient temperature, using manganese dioxide or ammonium persulphate as oxidant. The morphology and structure of polyaniline were characterized by scanning electron microscopy（SEM）, Fourier transform infrared spectroscopy（FTIR） and X-ray diffraction（XRD）. The electrochemical performances of the supercapacitor assembled with polyaniline were investigated by cyclic voltammetry, electrochemical impedance spectroscopy and galvanostatic charge-discharge. These results show that the specific capacity of the M-PANI electrode prepared by manganese dioxide was about 260 F/g at the charge-discharge current density of 5 mA/cm^2. After 300 charge-discharge cycles the specific capacity of the M-PANI electrode was about 204 F/g. For comparison, M-PANI has better cycle performance and higher capacity than N-PANI, which was prepared by ammonium persulphate.

关 键 词：聚苯胺 氧化剂 化学氧化聚合法 超级电容器 

分 类 号：TM53[电气工程—电器]