오존, 암모니아 순차적 처리를 통한 바나듐 레독스 흐름 전지용 활성화 카본 펠트 전극 개발

• Published in: 한국수소 및 신에너지학회 논문집 Vol. 32; no. 4; pp. 256 - 262
• Main Authors: 최한솔(HANSOL CHOI), 김한성(HANSUNG KIM)
• Format: Journal Article
• Language: Korean
• Published: 한국수소및신에너지학회 2021
• Subjects: 기계공학; Ammonia(암모니아); Activation of carbon felt(카본 펠트 활성화); Ozone(오존); Vanadium redox flow battery(바나듐 레독스 흐름 전지); Consecutive post treatments(순차적 처리)
• ISSN: 1738-7264; 2288-7407

A carbon felt electrode was prepared using ozone and ammonia sequential treatment and applied as an electrode for a vanadium redox flow battery (VRFB). The physical and electrochemical analyses demonstrate that the oxygen groups facilitate nitrogen doping in the carbon felt. Carbon felt (J5O3+NH3), which was subjected to ammonia heat treatment after ozone treatment, showed higher oxygen and nitrogen contents than carbon felt (J5NH3+O3), which was subjected to ammonia heat treatment first and then ozone treatment. From the charging/discharging of VRFB, the J5O3+NH3 carbon felt electrode showed 14.4 Ah/L discharge capacity at a current density of 150 mA /cm2, which was 15% and 33% higher than that of J5NH3+O3 and non-activated carbon felt (J5), respectively. These results show that ozone and ammonia sequential treatment is an effective carbon felt activation method to increase the performance of the vanadium redox flow battery.