부산대학교 도서관

In this work, we investigated the membrane-electrode assembly (MEA) parameters of an oxygenelectrode to develop a high-performance unitized regenerative fuel cell (URFC) that can be operated infuel cell (FC) and water electrolysis (WE) mode. The MEA parameters including gas diffusion layer,ionomer content, oxygen reduction reaction (ORR) type, oxygen evolution reaction (OER) catalyst, andcatalyst loading were optimized by calculating the round-trip efficiency of URFC. The performance in FCmode was largely affected by the MEA parameters compared to that of the WE mode performance. The FCmode performance is crucial for the achievement of high URFC performance. The optimized round-tripefficiency was 49% at 500 mA cm 2, which is comparable or superior to that reported in literature. Thisresult can be attributed to the highly efficient MEA structure suitable for bifunctional catalysts toparticipate in both ORR and OER.