Jeon, Kiung Lee, SangJae Kim, Jong Min Um, Sukkee Cho, EunAe Jung, Yeon Sik 2024-01-19T10:01:28Z 2024-01-19T10:01:28Z 2023-04-13 2023-03 2574-0962 https://pubs.kist.re.kr/handle/201004/113922 Surface microstructuring of polymer electrolyte membranes (PEMs) has been considered as an effective strategy to extend the three-phase boundary in PEM fuel cells (PEMFCs). However, it is still unclear which parameters are the most critical for maximizing cell performance. In this study, in order to elucidate the correlation between the membrane surface topography and PEMFC performances, we employed solvent -assisted nanotransfer printing and plasma deep etching techniques, which allow independent control of structural parameters. This approach enables the formation of various catalyst-membrane interface structures with controlled pattern periods and aspect ratios. Our systematic customization reveals that nanowell patterned membranes partially filled with carbon -supported platinum (Pt/C) can significantly improve fuel cell performance, which is driven by both reducing kinetic resistance and mass transport resistance. In particular, the sample with a pattern period of 1200 nm and a well depth of 1100 nm exhibited the best performance, a current density of 1000 mA/cm2 at a cell voltage of 0.6 V, and a maximum power density of 583 mW/cm2. These values are 53 and 41% higher than those with unpatterned membranes, respectively, at the same Pt loading. English AMER CHEMICAL SOC Customized Patterning of Deep Nanowell Structures in Polymer Electrolyte Membranes for Highly Enhanced Fuel Cell Performances Article 10.1021/acsaem.2c04163 1 ACS Applied Energy Materials, v.6, no.5, pp.3052 - 3060 ACS Applied Energy Materials 6 5 3052 3060 N scie scopus 000953345600001 2-s2.0-85149027793 Chemistry, Physical Energy & Fuels Materials Science, Multidisciplinary Chemistry Energy & Fuels Materials Science Article NAFION MEMBRANES CONDUCTIVITY PEMFCS IMPACT polymer electrolyte membrane fuel cell membrane patterning solvent-assisted nanotransfer printing plasma deep etching voids nanowell