Kim, MinJoong Jeong, GiSu Eom, KwangSup Cho, EunAe Ryu, JoungWook Kim, Hyoung-Juhn Kwon, HyukSang 2024-01-20T11:32:34Z 2024-01-20T11:32:34Z 2021-09-05 2013-09-19 0360-3199 https://pubs.kist.re.kr/handle/201004/127660 To improve cell performance, the effects of heat treatment time on the electrochemical properties and electrode structure of PTFE-bonded membrane electrode assemblies for PBI-based high-temperature proton exchange membrane fuel cells are investigated. The cell performance is observed to decrease in the high-current-density region rather than in the low-current-density region with increasing heat treatment time at 350 degrees C from 1 to 30 min. Microscopic studies reveal remarkable differences in the electrode structure by the agglomeration of dispersed PTFE and adjacent catalyst particles, depending on the heat treatment time. As the heat treatment time increases, only the large pore (secondary pore) volume in the electrode decreases, resulting in increase in mass transport resistance and concentration overpotential in the high-current-density region. Cell performance is not measured without heat treatment because the electrodes are not formed. When the electrodes are heat treated for 1 min at 350 degrees C, the best cell performance is obtained, 0.67 V at 200 mA cm(-2). Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD ACID-DOPED POLYBENZIMIDAZOLE CATALYST LAYER PERFORMANCE CARBON PEMFC MICROSTRUCTURE PLATINUM IONOMER MEA Effects of heat treatment time on electrochemical properties and electrode structure of polytetrafluoroethylene-bonded membrane electrode assemblies for polybenzimidazole-based high-temperature proton exchange membrane fuel cells Article 10.1016/j.ijhydene.2013.07.019 1 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.38, no.28, pp.12335 - 12342 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 38 28 12335 12342 scie scopus 000324720800012 2-s2.0-84883802112 Chemistry, Physical Electrochemistry Energy & Fuels Chemistry Electrochemistry Energy & Fuels Article ACID-DOPED POLYBENZIMIDAZOLE CATALYST LAYER PERFORMANCE CARBON PEMFC MICROSTRUCTURE PLATINUM IONOMER MEA High-temperature proton exchange membrane fuel cell Membrane electrode assembly Polytetrafluoroethylene Heat treatment Concentration overpotential Pore volume distribution