High Proton-Conductive and Temperature-Tolerant PVC-P4VP Membranes towards Medium-Temperature Water Electrolysis
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作者
Yin, Yichen; Ying, Yiming; Liu, Guojuan; Chen, Huiling; Fan, Jingrui; Li, Zhi; Wang, Chuhao; Guo, Zhuangyan; Zeng, Gaofeng
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刊物名称
MEMBRANES
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年、卷、文献号
2022, 12,
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关键词
Yin, Yichen; Ying, Yiming; Liu, Guojuan; Chen, Huiling; Fan, Jingrui; Li, Zhi; Wang, Chuhao; Guo, Zhuangyan; Zeng, Gaofeng
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摘要
Water electrolysis (WE) is a highly promising approach to producing clean hydrogen. Medium-temperature WE (100-350 degrees C) can improve the energy efficiency and utilize the low-grade water vapor. Therefore, a high-temperature proton-conductive membrane is desirable to realize the medium-temperature WE. Here, we present a polyvinyl chloride (PVC)-poly(4vinylpyridine) (P4VP) hybrid membrane by a simple cross-linking of PVC and P4VP. The pyridine groups of P4VP promote the loading rate of phosphoric acid, which delivers the proton conductivity of the PVC-P4VP membrane. The optimized PVC-P4VP membrane with a 1:2 content ratio offers the maximum proton conductivity of 4.3 x 10(-2) S cm(-1) at 180 degrees C and a reliable conductivity stability in 200 h at 160 degrees C. The PVC-P4VP membrane electrode is covered by an IrO2 anode, and a Pt/C cathode delivers not only the high water electrolytic reactivity at 100-180 degrees C but also the stable WE stability at 180 degrees C.
