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带有四唑侧基的聚（亚芳基亚烷基）用于碱性离子溶剂化聚合物电解质

Poly(Arylene Alkylene)s with Tetrazole Pendants for Alkaline Ion-Solvating Polymer Electrolytes.

作者信息

Xia Yifan, Rajappan Sinu C, Chen Si, Kraglund Mikkel Rykær, Serhiichuk Dmytro, Pan Dong, Jensen Jens Oluf, Jannasch Patric, Aili David

机构信息

Department of Energy Conversion and Storage, Technical University of Denmark, Elektrovej, Building 375, Lyngby, 2800, Denmark.

Polymer & Materials Chemistry, Department of Chemistry, Lund University, P.O. Box 124, 22100, Lund, Sweden.

出版信息

ChemSusChem. 2024 Dec 6;17(23):e202400844. doi: 10.1002/cssc.202400844. Epub 2024 Aug 8.

DOI:10.1002/cssc.202400844
PMID:39115117
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11632586/
Abstract

Alkaline ion-solvating membranes derived from a tetrazole functionalized poly(arylene alkylene) are prepared, characterized and evaluated as electrode separators in alkaline water electrolysis. The base polymer, poly[[1,1'-biphenyl]-4,4'-diyl(1,1,1-trifluoropropan-2-yl)], is synthesized by superacid catalyzed polyhydroxyalkylation and subsequently functionalized with tetrazole pendants. After equilibration in aqueous KOH, the relatively acidic tetrazole pendants are deprotonated to form the corresponding potassium tetrazolides. The room temperature ion conductivity is found to peak at 19 mS cm in 5 wt. % KOH, and slightly declines with increasing KOH concentration to 13 mS cm in 30 wt. % KOH. Based on an overall assessment of the mechanical properties, conductivity and electrode activity, 30 wt. % KOH is applied for alkaline electrolysis cell tests. Current densities of up to 1000 mA cm were reached with uncatalyzed Ni-foam electrodes at a cell voltage of less than 2.6 V, with improved gas barrier characteristics compared to that of the several times thicker Zirfon separator.

摘要

制备了一种由四唑官能化聚（亚芳基亚烷基）衍生的碱性离子溶剂化膜，并对其进行了表征，作为碱性水电解中的电极隔膜进行了评估。基础聚合物聚[[1,1'-联苯]-4,4'-二基（1,1,1-三氟丙烷-2-基）]通过超强酸催化的多羟基烷基化反应合成，随后用四唑侧基进行官能化。在KOH水溶液中平衡后，相对酸性的四唑侧基去质子化形成相应的四唑钾盐。发现在5 wt.% KOH中，室温离子电导率在19 mS cm处达到峰值，并随着KOH浓度增加到30 wt.% KOH时略有下降至13 mS cm。基于对机械性能、电导率和电极活性的全面评估，将30 wt.% KOH用于碱性电解槽测试。在小于2.6 V的电池电压下，未催化的泡沫镍电极的电流密度达到了1000 mA cm，与几倍厚的Zirfon隔膜相比，其气体阻隔特性得到了改善。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9acc/11632586/34538a9cb989/CSSC-17-e202400844-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9acc/11632586/3145bb3a533c/CSSC-17-e202400844-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9acc/11632586/b9810a9f2ff6/CSSC-17-e202400844-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9acc/11632586/2b2025ee3800/CSSC-17-e202400844-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9acc/11632586/a3384ce2135d/CSSC-17-e202400844-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9acc/11632586/a2dc89afc940/CSSC-17-e202400844-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9acc/11632586/02a5842e5118/CSSC-17-e202400844-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9acc/11632586/6d6547ed083a/CSSC-17-e202400844-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9acc/11632586/25dd8ebdf394/CSSC-17-e202400844-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9acc/11632586/34538a9cb989/CSSC-17-e202400844-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9acc/11632586/3145bb3a533c/CSSC-17-e202400844-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9acc/11632586/b9810a9f2ff6/CSSC-17-e202400844-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9acc/11632586/2b2025ee3800/CSSC-17-e202400844-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9acc/11632586/a3384ce2135d/CSSC-17-e202400844-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9acc/11632586/a2dc89afc940/CSSC-17-e202400844-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9acc/11632586/02a5842e5118/CSSC-17-e202400844-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9acc/11632586/6d6547ed083a/CSSC-17-e202400844-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9acc/11632586/25dd8ebdf394/CSSC-17-e202400844-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9acc/11632586/34538a9cb989/CSSC-17-e202400844-g009.jpg

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