Kim GyeongHee, Eom KwangSup, Kim MinJoong, Yoo Sung Jong, Jang Jong Hyun, Kim Hyoung-Juhn, Cho EunAe
Fuel Cell Research Center, Korea Institute of Science and Technology , 14gil-5 Hwarang-ro Sungbuk-gu, Seoul 136-791, Republic of Korea.
Department of Materials Science & Engineering, Korea Advanced Institute of Science and Technology , 291 Daehak-ro Yuseong-gu, Daejeon 305-701, Republic of Korea.
ACS Appl Mater Interfaces. 2015 Dec 23;7(50):27581-5. doi: 10.1021/acsami.5b07346. Epub 2015 Dec 9.
The membrane electrolyte assembly (MEA) designed in this study utilizes a double-layered cathode: an inner catalyst layer prepared by a conventional decal transfer method and an outer catalyst layer directly coated on a gas diffusion layer. The double-layered structure was used to improve the interfacial contact between the catalyst layer and membrane, to increase catalyst utilization and to modify the removal of product water from the cathode. Based on a series of MEAs with double-layered cathodes with an overall Pt loading fixed at 0.4 mg cm(-2) and different ratios of inner-to-outer Pt loading, the MEA with an inner layer of 0.3 mg Pt cm(-2) and an outer layer of 0.1 mg Pt cm(-2) exhibited the best performance. This performance was better than that of the conventional single-layered electrode by 13.5% at a current density of 1.4 A cm(-2).
本研究设计的膜电解质组件（MEA）采用双层阴极：内层催化剂层通过传统的转印法制备，外层催化剂层直接涂覆在气体扩散层上。采用双层结构是为了改善催化剂层与膜之间的界面接触，提高催化剂利用率，并改善从阴极去除产物水的效果。基于一系列双层阴极的MEA，其总铂负载固定为0.4 mg cm(-2)，内外铂负载比例不同，内层为0.3 mg Pt cm(-2)、外层为0.1 mg Pt cm(-2)的MEA表现出最佳性能。在电流密度为1.4 A cm(-2)时，该性能比传统单层电极的性能高出13.5%。
