CAJ | 학술논문

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5 mA/cm~2下的单电极比电容达260 F/g,300次循环后比电容仍有204 F/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.
이이양화맹、과류산안작위양화제,채용화학원위취합법재실온하제비득도취분알,병채용소묘전자현미경(SEM),부리협변환홍외광보(FTIR)이급X-사선연사(XRD)대기결구화형모진행료표정.용순배복안법、전화학조항화항전류충방전기술측시료이기작위전겁적초급전용기적전화학성능.결과표명,이이양화맹위양화제제비적취분알(간칭위M-PANI)재전류밀도위5 mA/cm~2하적단전겁비전용체260 F/g,300차순배후비전용잉유204 F/g,비이과류산안작위양화제제비적취분알(간칭위N-PANI)구유경호적순배성능화경고적비용량.
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.