Ben Youcef, Hicham Henkensmeier, Dirk Balog, Sandor Scherer, Guenther G. Gubler, Lorenz 2024-01-19T18:04:51Z 2024-01-19T18:04:51Z 2021-09-04 2020-02 0360-3199 https://pubs.kist.re.kr/handle/201004/119036 A novel radiation grafted ETFE based proton conducting membrane was prepared by double irradiation grafting of two different monomers. The intrinsic oxidative stability of the ETFE-g-poly(styrene sulfonic acid-co-divinylbenzene) membrane was improved by reducing the gas crossover through incorporation of polymethacrylonitrile (PMAN) containing the strong polar nitrile group. A fuel cell test was carried out at 80 degrees C under constant current density of 500 mA cm(-2) for a time exceeding 1'900 h. The incorporation of PMAN considerably improves the interfacial properties of the membrane-electrode assembly. No significant change in the membrane hydrogen crossover and performance over the testing time was observed, except for a measured decrease in the membrane ohmic resistance after 1'000 h. The combination of the double irradiation induced grafting with the use of the PMAN as gas barrier in addition to its chelating abilities (e. g. Ce3+) offers a promising strategy to develop more durable membranes for fuel cells. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD Copolymer synergistic coupling for chemical stability and improved gas barrier properties of a polymer electrolyte membrane for fuel cell applications Article 10.1016/j.ijhydene.2019.12.208 1 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.45, no.11, pp.7059 - 7068 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 45 11 7059 7068 N scie scopus 000519652800092 2-s2.0-85078069838 Chemistry, Physical Electrochemistry Energy & Fuels Chemistry Electrochemistry Energy & Fuels Article PROTON-EXCHANGE MEMBRANES FEP FILMS CONDUCTING MEMBRANES RADIATION STYRENE ACID POLY(ETHYLENE-CO-TETRAFLUOROETHYLENE) DEGRADATION PERFORMANCE TRANSPORT Radiation grafting Polymer electrolyte fuel cell Proton exchange membrane ETFE Divinylbenzene Membrane electrode assembly