PtCo/C 촉매를 사용한 PEMFC MEA의 활성화 프로토콜 비교

• Published in: 한국수소 및 신에너지학회 논문집 Vol. 34; no. 2; pp. 178 - 186
• Main Authors: 이기성(GISEONG LEE), 정현승(HYEON SEUNG JUNG), 현진호(JINHO HYUN), 박찬호(CHANHO PAK)
• Format: Journal Article
• Language: Korean
• Published: 한국수소및신에너지학회 2023
• Subjects: Electrochemical impedance spectroscopy(전기화학 임피던스 분광법); Activation process(활성화 과정); Distribution of relaxation time(이완 시간 분포); Polymer electrolyte membrane fuel cell(고분자 전해질막 연료전지); Charge transfer resistance(전하 전달 저항)
• ISSN: 1738-7264; 2288-7407
• DOI: 10.7316/JHNE.2023.34.2.178

Three activation methods (constant voltage, current cycling, and hydrogen pumping) were applied to investigate the effects on the performance of the membrane electrode assembly (MEA) loaded with PtCo/C catalyst. The current cycling protocol took the shortest time to activate the MEA, while the performance after activation was the worst among the all activation methods. The constant voltage method took a moderate activation time and exhibited the best performance after activation. The hydrogen pumping protocol took the longest time to activate the MEA with moderate performance after activation. According to the distribution of relaxation time analysis, the improved performance after the activation mainly comes from the decrease of charge transfer resistance rather than the ionic resistance in the cathode catalyst layer, which suggests that the existence of water on the electrode is the key factor for activation.