Polyethyleneimine-polyvinylchloride-based crosslinked membranes for use in PEM water electrolysis operating above 100?C
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作者
Yin, Yichen; Liu, Sijia; Yang, Yang; Gong, Dian; Liu, Minghao; Liu, Guojuan; Wu, Ping; Xu, Qing; Yu, Chengbing; Zeng, Gaofeng
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刊物名称
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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年、卷、文献号
2022, 48, 0360-3199
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关键词
Yin, Yichen; Liu, Sijia; Yang, Yang; Gong, Dian; Liu, Minghao; Liu, Guojuan; Wu, Ping; Xu, Qing; Yu, Chengbing; Zeng, Gaofeng
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摘要
Water electrolysis is the most promising method to produce non-fossil fuel derived H2. The medium temperature (100-350 degrees C) water (steam) electrolysis is highly promising tech-nology because it can not only reduce energy consumption but also utilize the low-grade waste heat. However, it is challenged by the proton conductive membrane performance. Herein, polyvinyl chloride (PVC) -polyethyleneimine (PEI) hybrid membrane was realized by a simple cross-linking of PVC and PEI. The intercalated nitrogen-containing groups of PEI promote the adsorption and loading rate of phosphoric acid, which offers the proton conductivity for hybrid membrane. The optimized PVC-PEI with content ratio of 1:4 ex-hibits a maximum proton conductivity of 4.3 x 10-2 S cm-1 at 180 degrees C and a long-term conductivity stability for 200 h at 140 degrees C. The PVC-PEI membrane electrode assembly with commercial IrO2 anode and Pt/C cathode posts high water electrolysis reactivity in the range of 100-180 degrees C and reliable stability for the water electrolysis at 140 degrees C.(c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
