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在室温下,采用化学原位聚合法制备得到超级电容器用导电聚苯胺(PANI),并采用扫描电子显微镜(SEM)和X-射线衍射(XRD)对其形貌和结构进行了表征。以制备的PANI为活性物质作为电极材料,1mol/L Na_2SO_4水溶液为电解液组装成扣式超级电容器,通过循环伏安和恒电流充放电测试研究其电化学性能。结果表明,制备的导电PANI具有高的比容量、良好的功率特性和较好的循环性能。在电流密度为5mA/cm~2下的单电极比容量达451 F/g,1000次循环后容量仍保持在208 F/g。电流密度为20mA/cm~2下的单电极比容量仍有230F/g。能量密度最高达7.35Wh/kg。
Conductive polyaniline (PANI) for supercapacitors was prepared by chemical in situ polymerization at room temperature. The morphology and structure of PANI were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The prepared PANI as the active material as the electrode material, 1mol / L Na_2SO_4 aqueous solution as the electrolyte assembled into a button supercapacitor, by cyclic voltammetry and galvanostatic charge-discharge test to study the electrochemical properties. The results show that the conductive PANI prepared has high specific capacity, good power characteristics and good cycling performance. The specific capacity of the single electrode at a current density of 5 mA / cm2 was 451 F / g, and the capacity remained at 208 F / g after 1000 cycles. The current density of 20mA / cm ~ 2 under the single electrode capacity is still 230F / g. Energy density up to 7.35Wh / kg.