Chae, Ji Eon Yoo, Sung Jong Kim, Jin Young Jang, Jong Hyun Lee, So Young Song, Kwang Ho Kim, Hyoung-Juhn 2024-01-19T16:04:30Z 2024-01-19T16:04:30Z 2021-09-02 2020-11 0360-3199 https://pubs.kist.re.kr/handle/201004/117895 The electrode ionomer is a key factor that significantly affects the catalyst layer morphology and fuel cell performance. Herein, sulfonated poly(arylene ether sulfone)-based electrode ionomers with polymers of various molecular weights and alcohol/water mixtures were prepared, and those comprising the alcohol/water mixture showed a higher performance than the ones prepared using higher boiling solvents, such as dimethylacetamide; this is owing to the formation of the uniformly dispersed ionomer catalyst layer. The relation between ionomer molecular weight for the same polymer structure and the sulfonation degree was investigated. Because the chain length of polymer varies with molecular weight and chain entanglement degree, its molecular weight affects the electrode morphology. As the ionomer covered the catalyst, the agglomerates formed were of different morphologies according to their molecular weight, which could be deduced indirectly through dynamic light scattering and scanning electron microscopy. Addition- ally, the fuel cell performance was confirmed in the current-voltage curve. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD Hydrocarbon-based electrode ionomer for proton exchange membrane fuel cells Article 10.1016/j.ijhydene.2020.03.003 1 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.45, no.57, pp.32856 - 32864 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 45 57 32856 32864 N scie scopus 000588285000012 2-s2.0-85082433561 Chemistry, Physical Electrochemistry Energy & Fuels Chemistry Electrochemistry Energy & Fuels Article POLY(ARYLENE ETHER SULFONE) MOLECULAR-WEIGHT CATALYST LAYER BINDER PERFORMANCE MORPHOLOGY TRANSPORT NAFION COPOLYMERS KETONE) Hydrocarbon-based electrode ionomer Membrane-electrode assembly Polymer electrolyte Proton exchange membrane fuel cell Sulfonated poly(arylene ether sulfone)