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
ABSTRACT Direct formate fuel cells (DFFCs) provide a safe liquid‐fuel pathway for renewable energy storage, yet achieving high performance under alkali‐free conditions remains challenging due to limitations in ion transport and catalyst‐layer structure. Here, for the first time, a cation‐exchange membrane (CEM) was combined with cationic ionomers (CI) in both catalyst layers to establish a fully alkali‐free configuration, and the effects of ionomer loading were systematically examined. Optimizing the anode ionomer content to ionomer‐to‐carbon (I/C) ratio of 0.83 produced a well‐balanced liquid–catalyst–ionomer triple‐phase boundary and improved reaction kinetics. Fuel‐composition analysis revealed that Na + transport across the CEM accounted for only 20%–30% of the theoretical value, indicating that proton transport dominates charge compensation under alkali‐free operation. At the cathode, reducing CI content enhanced oxygen transport by thinning the ionomer film and increasing access to catalytic sites, achieving a peak power density of 92 mW·cm −2 —over twice that of previously reported alkali‐free Na‐ion‐conducting DFFCs. Although lower ionomer loading increased HCOO − crossover and accelerated voltage decay, these results demonstrate that appropriate CI tuning in both electrodes effectively balances oxygen transport, crossover and ion conduction, thereby enabling substantially improved performance in alkali‐free DFFCs without external alkali additives.
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.