聚苯胺/碳复合材料在混合型电容器中的应用

采用原位聚合法制备了聚苯胺/活性炭复合材料(PANI/C),复合材料中聚苯胺的质量分数为46.4%.以1 mol/LH2SO4溶液为电解液,Nafion 117质子交换膜为隔膜,分别采用复合材料电极和活性炭电极为正负极组装了混合型电容器,并用循环伏安、交流阻抗、恒流充放电测试等方法考察了电容的性能.结果表明,该混合型电容器在0～1.35 V电势范围内电容性能良好.3.0 mA/cm2电流密度下,电容器比容量为83.1 F/g,比活性炭电容器提高82%,电容器的比能量可达21.0 Wh/kg,是活性炭电容器的3倍以上.1 000次充放电循环后,电容器比容量保持在初始比容量的89.1%.

Application of polyaniline/carbon composite material in hybrid supercapacitor

Polyaniline/activated carbon composite material was synthesized by in-situ polymerization method. Hybrid capacitor was fabricated by using PANI/C as positive electrode and activated carbon as negative electrode, 1 mol/L H2SO4 solution as electrolyte and Nafion 117 as separator.The capacitance performance of the hybrid capacitor was investigated by cyclic voltammetry, electrochemical impedance spectroscopy, galvanostatic charge-discharge. The results show that the capacitor performs well in the potential range of 0-1.35 V. The specific capacitance reached 83.1 F/g at the current density of 3 mA/cm2, increased 82% than activated carbon capacitor. The energy density amounted to 21.0 Wh/kg, three times larger than the activated carbon capacitor.After 1 000 cycles of charge-discharge, the specific capacitance maintained 89.1%, revealed a good cycle life.