Kim, Kun-Ho Lee, Kwan-Young Kim, Hyoung-Juhn Cho, EunAe Lee, Sang-Yeop Lim, Tae-Hoon Yoon, Sung Pil Hwang, In Chul Jang, Jong Hyun 2024-01-20T19:35:00Z 2024-01-20T19:35:00Z 2021-09-02 2010-03 0360-3199 https://pubs.kist.re.kr/handle/201004/131681 We analyzed the effects of ionomer content on the proton exchange membrane fuel cell (PEMFC) performance of membrane electrode assemblies (MEAs) fabricated by a catalyst-coated membrane (CCM) spraying method in partially humidified atmospheric air and hydrogen When high loading Pt/C catalysts (45 5 wt %) were used, we observed that catalytic activity was not directly proportional to electrochemical active surface area (EAS) This suggests that ionic conductivity through ionomers in catalyst layers is also an important factor affecting MEA performance in addition, the effects of mass transport were experimentally evaluated by manipulating the air stoichiometry ratio at the cathodes MEA performance was more sensitive to flow rates under conditions of higher ionomer content Due to the combined effect of EAS, ionic conductivity, and mass transfer characteristics (all of which varied according to the ionomer content), an MEA with 30 wt % ionomer content at the cathode (25 wt % at the anode) was shown to yield the best performance (C) 2009 Professor T Nejat Veziroglu Published by Elsevier Ltd All rights reserved English PERGAMON-ELSEVIER SCIENCE LTD ELECTROLYTE FUEL-CELLS LOADING ELECTRODES LAYER PERFORMANCE PLATINUM CATHODE CARBON FABRICATION DURABILITY DEPENDENCE The effects of Nafion (R) ionomer content in PEMFC MEAs prepared by a catalyst-coated membrane (CCM) spraying method Article 10.1016/j.ijhydene.2009.11.058 1 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.35, no.5, pp.2119 - 2126 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 35 5 2119 2126 scie scopus 000275612000031 2-s2.0-75349105790 Chemistry, Physical Electrochemistry Energy & Fuels Chemistry Electrochemistry Energy & Fuels Article ELECTROLYTE FUEL-CELLS LOADING ELECTRODES LAYER PERFORMANCE PLATINUM CATHODE CARBON FABRICATION DURABILITY DEPENDENCE Catalyst-coated membrane (CCM) spraying method Nafion ionomer Polymer electrolyte membrane fuel cells (PEMFC) Membrane-electrode assembly (MEA) Ionic resistance