| 초록 |
The oxygen treatment on polyacrylonitrile (PAN)-based activated carbon fabric was conducted to study the influence of carbon-oxygen complexes on the performance of capacitors fabricated with the carbon fabric. Surface analysis showed that most of the oxygen functional groups created from the oxygen treatment were the carbonyl or quinone type. The performance of the capacitors was tested in 1 M H2SO4, using potential sweep cyclic voltammetry and constant current charge-discharge cycling. It was found that the Faradaic current, the contributor of pseudo-capacitance, increased significantly with the extent of oxygen treatment, while the increase in the double-layer capacitance was minor. The overall specific capacitance showed an increase up to 25% from 120 to 150 F·g−1 at a current density of 0.5 mA·cm−2, due to the oxygen treatment. |
