전극촉매의 내구성 향상을 위한 지지체 특성 평가 연구

• Published in: 한국수소 및 신에너지학회 논문집 Vol. 30; no. 6; pp. 531 - 539
• Main Authors: 장정윤(JEONGYUN JANG), 임성대(SUNG-DAE YIM), 박석희(SEOK-HEE PARK), 정남기(NAMGEE JUNG), 박구곤(GU-GON PARK)
• Format: Journal Article
• Language: Korean
• Published: 한국수소및신에너지학회 2019
• Subjects: 기계공학; electrocatalyst(전극촉매); Accelerated stress test(가속 스트레스 시험); Carbon corrosion(탄소 부식); Polymer electrolyte fuel cell(고분자전해질연료전지, PEFC); Oxygen reduction reaction(산소환원반응)
• ISSN: 1738-7264; 2288-7407

The development of cost-effective electrocatalysts with high durability is one of the most important challenges for the commercialization of polymer electrolyte fuel cells (PEFCs). The durability of the electrocatalyst has been studied in terms of structural change in the active metal and the support. In particular, in fuel cell vehicles, degradation of the carbon-based support is known to have a significant effect on the electrocatalyst deterioration since the start-up/shut-down cycle is frequently repeated. The requirements for the support of the electrocatalyst include high surface area, electrical conductivity, chemical stability, and so on. In this study, we propose the evaluation methods for choosing better support materials and present the physicochemical properties that promising carbon supports should have. Three kinds of carbon materials with different crystallinity are compared. From in-depth study using X-ray diffraction, Raman spectroscopy, thermogravimetric analysis, and accelerated stress test, it is clearly confirmed that the durability of carbon-supported electrocatalysts is closely related to the physicochemical properties of the carbon supports.