Shin, Mun-Sik Lim, Seohee Park, Jong-Hyeok Kim, Hyoung-Juhn Chae, Soryong Park, Jin-Soo 2024-01-19T17:34:28Z 2024-01-19T17:34:28Z 2021-09-05 2020-04-14 0360-3199 https://pubs.kist.re.kr/handle/201004/118730 A novel anion-conducting ionomer binder, quaternized polybenzimidazoles (QPBIs) with 4-methyl-4-glycidylmorpholin-4-ium chloride (MGMC) in the main-chain and/or in the side group were synthesized for solid alkaline fuel cells (SAFCs). Crosslinking of the poly-benzimidazole derivatives using a crosslinker containing epoxy groups formed ionomer binder in electrodes, and the crosslinked QPBIs showed better mechanical stability than non-crosslinked QPBIs. During the electrode drying process, on-site crosslinking was introduced to form thermally crosslinked ionomer binder in catalyst layers. A bench-scale SAFC with the crosslinked QPBI (CQPBI) containing 35 wt% of ionomer binder showed higher peak power density (35.3 mW cm(-2)) than the SAFC with 2,2'(m-phenylene)-5,5'bibenzimidazole (m-PBI) with 35 wt% of ionomer binder (20.9 mW cm(-2)). The membrane-electrode assembly (MEA) with CQPBI (35 wt% binder) showed two times higher chemical stability than that with m-PBI (35 wt% of ionomer binder) in load cell tests. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD ANION-EXCHANGE MEMBRANE POLYMER ELECTROLYTE MEMBRANE KOH-DOPED POLYBENZIMIDAZOLE POLY(VINYL ALCOHOL) PERFORMANCE STABILITY FABRICATION AMMONIUM LINKING LIQUID Thermally crosslinked and quaternized polybenzimidazole ionomer binders for solid alkaline fuel cells Article 10.1016/j.ijhydene.2020.02.081 1 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.45, no.20, pp.11773 - 11783 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 45 20 11773 11783 scie scopus 000524128500034 2-s2.0-85081677341 Chemistry, Physical Electrochemistry Energy & Fuels Chemistry Electrochemistry Energy & Fuels Article ANION-EXCHANGE MEMBRANE POLYMER ELECTROLYTE MEMBRANE KOH-DOPED POLYBENZIMIDAZOLE POLY(VINYL ALCOHOL) PERFORMANCE STABILITY FABRICATION AMMONIUM LINKING LIQUID On-site crosslinking Polybenzimidazole Ionomer binder Catalyst layer Membrane-electrode assembly Solid alkaline fuel cell