메뉴 건너뛰기
소속 기관 / 학교 인증
인증하면 논문, 학술자료 등을  무료로 열람할 수 있어요.
한국대학교, 누리자동차, 시립도서관 등 나의 기관을 확인해보세요
(국내 대학 90% 이상 구독 중)
고객센터 ENG
주제분류

논문 기본 정보

저자정보
출처
Springer Science and Business Media LLC Scientific Reports 15(1)
오류 신고하기
표지

검색

    초록·키워드

    Polymer electrolyte fuel cells (PEFCs) face significant challenges during cold starts, where water phase transitions affect critically fuel cell performance. While previous studies have primarily focused on ice formation and melting behavior, the impact of water condensation after breaking through the freezing point remains insufficiently understood. In this study, we apply operando synchrotron X-ray computed tomography to visualize the transient water behavior in a PEFC under three different relative humidity (RH) conditions during a heating/cooling cycle simulating real-world cold-start conditions. The results revealed localized water flooding and hysteresis during the heating/cooling phase. A quantitative layer-by-layer analysis shows that water accumulation in each component layer strongly depends on both RH and the thermal cycle process. Moderate RH conditions promote efficient vapor-phase transport and minimize water flooding while avoiding membrane dehydration. These findings highlight water condensation as a key factor influencing cold-start performance and provide new insights into water management for more robust cold-start strategies toward next-generation PEFC systems.

    본문·목차

    최근 본 자료 전체보기