Novel gel-filled composite membrane for alkaline water electrolysis

化学工业与工程

Chemcial Industry and Engineering

2023, Vol. 40

Issue (3) :141-150 DOI: 10.13353/j.issn.1004.9533.20220315

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Novel gel-filled composite membrane for alkaline water electrolysis

QIN Xingxing¹, MIN Luofu¹, ZHANG Wen¹, XU Wei², WANG Yuxin¹

1. School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Tianjin Key Laboratory of Membrane Science and Desalination Technology, Tianjin University, Tianjin 300350, China;
2. Tianjin Mainland Hydrogen Equipment Co., Ltd., Tianjin 301609, China

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Abstract A porous filling strategy was adopted, with porous polyphenylene sulfide (PPS) non-woven fabric as the base membrane, and polyvinyl alcohol (PVA) gel as the filler, a gel-filled composite membrane, was prepared. Through a facile blade coating method combined with chemical cross-linking, a PVA-filled PPS cross-linked composite membrane (PPS-PVA) was prepared, which has high ionic conductivity, gas barrier properties, chemical stability and mechanical stability. Compared with Zirfon UTP-500 membrane, PPS-PVA composite membrane has lower area resistance (150 mΩ·cm²) and lower hydrogen permeability (3.5×10^-8 mol·(cm^-2·s^-1·kPa^-1)) at 80 ℃. The alkaline stability test was carried out in 30% KOH solution. After 500 h, the mass of the PVA in composite membrane could be maintained at about 88% of the initial value, and the membrane has good mechanical strength. Single cell alkaline water electrolysis with a PPS-PVA composite membrane at a current density of 500 mA·cm^-2 requires a voltage of 1.91 V, which is lower than 1.96 V required for Zirfon UTP-500 membrane.

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	QIN Xingxing
	MIN Luofu
	ZHANG Wen
	XU Wei
	WANG Yuxin

Keywords： polyphenylene sulfide non-woven fabric polyvinyl alcohol gel-filled membrane blade coating method alkaline water electrolysis

Received 2022-04-07;

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Corresponding Authors: 王宇新,教授,E-mail:yxwang@tju.edu.cn。 Email: yxwang@tju.edu.cn

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QIN Xingxing, MIN Luofu, ZHANG Wen, XU Wei, WANG Yuxin.Novel gel-filled composite membrane for alkaline water electrolysis[J] Chemcial Industry and Engineering, 2023,V40(3): 141-150

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