인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록·키워드
Variations in humidity in operating polymer electrolyte membrane fuel cells(PEMFCs) lead to the swelling and shrinkage of membranes which causes the mechanical degradation. Most previous studies have focused on the mechanical damage of the membrane although mass transport was also influenced by the mechanical degradation. In this study, the effect of mechanical degradation in PEMFC on the performance and mass transport loss was investigated. In order to induce the mechanical degradation, accelerated stress test(AST) with periodic wet and dry conditions was employed. The performance was maintained up to AST 2000 cycles. At above 2000 cycles, the performance started to decrease. The maximum power density after AST 5000 cycles was reduced by about 50%. Mass transfer losses after AST were higher than those in original cell. Different with the original PEMFC having no mass transport loss, the mass transport loss after AST 5000 cycles occurred even at low current density.
본문·목차
인공지능 문자 인식 모델을 통해 추출된 텍스트로, 일부 오타나 오류가 포함될 수 있으나 지속적으로 개선 중입니다.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.