Mayadevi, T. S. Sung, Seounghwa Chae, Ji Eon Kim, Hyoung-Juhn Kim, Tae-Hyun 2024-01-19T19:33:43Z 2024-01-19T19:33:43Z 2022-01-25 2019-07 0360-3199 https://pubs.kist.re.kr/handle/201004/119799 Anion exchange membranes based on quaternary ammonium-functionalized poly(ether sulfone ketone) block copolymers (QA-PESK) with various hydrophilic-hydrophobic oligomer block ratios (10:7, 10:18, and 10:26) were synthesized, and the block length effect on the membranes' physicochemical and electrical properties were systematically investigated. The QA-PESK-10-18 membrane, prepared using a hydrophilic and hydrophobic block ratio of 10:18, displayed well-balanced hydrophilic/hydrophobic phase separation, the highest conductivity of 23.19 mS cm(-1) at 20 degrees C and 57.84 mS cm(-1) at 80 degrees C, and the highest alkaline stability among the three block ratios tested, indicating that the membranes' properties were closely related to their morphologies, which were determined by the hydrophilic/hydrophobic ratio of the block copolymer. The H-2/O-2 single cell performance using the QA-PESK-10-18 revealed a maximum power density of 235 mW cm(-2). (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD Quaternary ammonium-functionalized poly(ether sulfone ketone) anion exchange membranes: The effect of block ratios Article 10.1016/j.ijhydene.2019.05.061 1 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.44, no.33, pp.18403 - 18414 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 44 33 18403 18414 N scie scopus 000476964900088 2-s2.0-85066299912 Chemistry, Physical Electrochemistry Energy & Fuels Chemistry Electrochemistry Energy & Fuels Article POLY(ARYLENE ETHER SULFONE)S FUEL-CELLS ALKALINE STABILITY IONIC LIQUID WATER-UPTAKE PERFORMANCE COPOLYMERS IMIDAZOLIUM MOIETIES CATIONS Polymer electrolyte membranes Anion exchange membranes Quaternary ammonium-functionalized poly(ether sulfone ketone) block copolymers Block ratios