| 초록 |
Electric double layer capacitors (EDLCs) are an excellent electrochemical energy storage system (ESS) due to their superior power density, faster charge–discharge ability, and longer cycle life compared to those of other EES systems. Petroleum pitch (PP) is a graphitizable carbon that is a promising precursor for ACs because of its high carbon content. In this study, pre-oxidized PP-derived AC (OPP-AC) was prepared to investigate the effects of pre-oxidation on the electrochemical behaviors of PP. The specific surface area and pore size dis-tribution of OPP-AC was lower and narrower, respectively, compared to the textural properties of untreated PP-derived AC (PP-AC). On the other hand, the specific capacitance of OPP-AC was 25% higher than that of PP-AC. These results revealed that pre-oxidation of PP induces a highly de-veloped micropore structure of ACs, resulting in improved electrochemical performance. |
