关键词: 锰氧化物, 聚苯胺, 活性炭, 电极材料, 超级电容器

Abstract:

The polyaniline-carbon (PAnC) electrode was prepared by the polymerization of aniline monomer and activated carbon in ice water bath, and followed by chemical deposition of manganese dioxide MnO₂-PAnC composite material. The specific capacitance of MnO₂-PAnC reached 459 F•g^-1. The cyclic voltammetric results showed a small deformation in the voltammogram curve obtained with the MnO₂-PAnC electrode at high scan rate, indicating good reversibility and capacitive properties. The AC impedance results revealed that the MnO₂-PAnC electrode displayed the smallest charge transfer resistance and the fastest diffusion
rate of surface ions than other two materials of MnO₂ and MnO₂-C. After 500 cycles of charging and discharging processes, the capacitance retention rate of MnO₂-PAnC was still higher than 60%. The MnO₂-PAnC is promising as a good electrode material for supercapacitors.

Key words: manganese oxide, polyaniline, active carbon, electrode material, supercapacitor