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Vinylic-addition Polynorbornene-based Anion-Exchange Membranes with Semi-Interpenetrating Polymer Networks for Water Electrolysis

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Chinese Journal of Polymer Science 2024年第12期42卷 1888-1896,I0006页

作者： Ting Wang Yu Wang Wei You Beijing National Laboratory for Molecular Sciences(BNLMS) CAS Key Laboratory of Engineering PlasticsInstitute of ChemistryChinese Academy of SciencesBeijing100190China University of Chinese Academy of Sciences Bejing 100049China

Anion-exchange membranes(AEMs)with high conductivity and stability are essential components of hydrogen related water electrolysis and fuel cell *** the past decades,polynorbornene(PNB)-based AEMs have shown excellent performance due to their saturated all-carbon-based backbones and diverse strategies to prepare cross-linked ***,nearly all previously reported PNB-based AEMs rely on the alkyl-substituted norbornene monomers,whose low-yielding synthesis leads to high-cost of the *** addition,the crosslinked PNB-based AEMs usually suffered from mechanical ***,we propose a novel semi-interpenetrating polymer network(s-IPN)strategy to simultaneously enhance mechanical modulus and ionic conductivity,while using commercial 5-vinyl-2-norbornene(VNB)as the single norbornene derivatives to prepare high-performance AEMs.A diallylphenol quaternary ammonium salt was used for photo-induced crosslinking with poly-VNB and various dithiols to produce AEMs with s-IPN *** resultant membranes have excellent hydroxide conductivities and alkaline stability in 1 mol/L KOH at 80℃,and are successfully applied in alkaline anion-exchange membrane water electrolyzers to stably operateforover150h.

关键词： Anion-exchange membranes Semi-interpenetrating polymer network Vinylic-addition polynorbornene Thiol-ene click reaction alkaline waterelectrolysis

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Polysulfone and zirconia composite separators for alkaline water electrolysis

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Frontiers of Chemical Science and Engineering 2013年第2期7卷 154-161页

作者： Li XU Wei LI Yan YOU Shaoxing ZHANG Yingchun ZHAO School of Chemical Engineering and Technology Tianjin University Tianjin 300072 China Tianjin Key Laboratory of Membrane Science and Desalination Technology Tianjin University Tianjin 300072 China Research and Development Dept Tianjin Mainland Hydrogen Equipment Co. Ltd. Tianjin 301609 China

The novel composite separators composed of polysulfone and zirconia were prepared by phase inversion precipitation technique. This technique allows pre-eva- poration time and extraction temperature to be varied in order to obtain optimal performances of the separators. In order to evaluate practical applicability of those composite separators, a small-scale electrolysis experimental appara- tus was used to investigate the changes of cell voltage, gas purity and separator stability. The results revealed a decreased cell voltage compared to the conventional asbestos separators, and the gas purity and separator stability met the requirements for industrial use.

关键词： phase inversion separator alkaline waterelectrolysis mechanical and chemical stability

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