超级电容器用聚苯胺/活性炭复合电极的研究

The performance of activated carbons coated with polyaniline (PANIC) by polymerization of aniline using cyclic voltammetry was investigated as an electrode for supercapacitors by scanning electron microscopy, electrochemical impedance spectroscopy, and constant current charge/discharge measurement. Results showed that a PANI thin film was uniformly deposited on the surface of the activated carbon, forming an interlinked porous network. The PANIC composite electrodes had better cycling stability than PANI electrodes and the specific capacitance of the composite electrodes was 587F/g, which was much higher than that of the pristine activated carbon (140F/g), owing to the faradic reaction of PANI with the electrolyte. The PANI electrode was less stable than the PANIC composite electrode with a capacitance decay from 513 to 334F/g for the former and 415 to 385 for the latter, after 50cycles.