5 kW 고온 고분자연료전지 스택 수명 극대화를 위한 운전 방법론

• Published in: 한국수소 및 신에너지학회 논문집 Vol. 27; no. 2; pp. 144 - 154
• Main Authors: 김지훈(Jihun Kim), 김민진(Minjin Kim), 손영준(Young Jun Sohn), 유상석(Sangseok Yu)
• Format: Journal Article
• Language: Korean
• Published: 한국수소및신에너지학회 2016
• Subjects: 기계공학; 인산; Degradation; Phosphoric Acid; 고온 고분자 연료전지; OCV; 내구성; 개방회로전압; HT-PEMFC; 열화; Durability; Operating condition; 운전조건
• DOI: 10.7316/KHNES.2016.27.2.144
• ISSN: 1738-7264

HT-PEMFC (high temperature polymer electrolyte membrane fuel cell) using PA (phosphoric acid) doped PBI (polybenzimidazole) membrane has been researched for extending the lifetime. However, the existing work on durability of HT-PEMFC focuses on identifying degradation causes of lab scale. The short life time of HT-PEMFC is still the problem for its commercialization. In this paper, an operating method to maximize life time of 5kW HT-PEMFC stack are proposed. The proposed method includes major steps such as minimization of OCV (Open Circuit Voltage) exposure, control of the proper stack temperature, and N2 purging for the stack. This long life operating method was based on the fragmentary results of degradation from previous research works. Experimentally, the 5 kW homemade HT-PEMFC stack was operated for a long time based on the proposed method and the stack successfully can operate within the desired degradation rate for the target life time.