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高质子传导率的GSPEEK凝胶膜制备及其PEMWE性能

作者：刘绪锟，王丽华，仇智，韩旭彤

单位： 1天津工业大学材料科学与工程学院，天津300387; 2 中国科学院化学研究所，极端环境高分子院重点实验室，北京100190

关键词： GSPEEK凝胶膜;质子交换膜；电解水制氢；质子电导率

DOI号：

分类号： TQ028；TB383

出版年,卷(期):页码： 2024,44(4):28-35

摘要：

磺化聚醚醚酮（SPEEK）质子交换膜一般是将聚醚醚酮（PEEK）先磺化然后再进行溶解流延的方式来制备，存在制备过程复杂和电导率较低等问题。本研究创新性的将磺化与成膜过程集成，一步实现从PEEK到磺化度可控的凝胶质子膜（GSPEEK）的高效制备。GSPEEK膜具有的独特“鱼鳞”状微观形貌，极大提升其质子电导率，在GSPEEK固含量为10%（质量分数）、成膜温度40℃时电导率可达167.0mS/cm，其质子传导率分别是普通SPEEK膜的3.05倍和商业Nafion 117膜的2.45倍。组装成质子交换膜电解水制氢膜电极（MEA）进行测试，结果表明，当电压为2.4 V时，GSPEKK-10膜的电流密度为1000mA/cm2,相较于普通SPEEK膜和Nafion-117膜的600mA/cm2、400mA/cm2，其电解水性能得到了大幅度的提升，具有潜在的产业化前景。

?Sulfonated polyether ether ketone (SPEEK) proton exchange membranes are generally prepared by first sulfonating polyether ether ketone (PEEK) and then dissolving and casting it, which has problems such as complex preparation process and low conductivity. This research innovatively integrates sulfonation and membrane forming process to achieve efficient preparation of gel proton membrane (GSPEEK) with controllable sulfonation degree in one step. The unique "fish scale" like microstructure of GSPEEK membrane greatly enhances its proton conductivity. At a solid content of 10% and a film-forming temperature of 40 ℃, the conductivity can reach 167.0mS/cm. Its proton conductivity is 4.05 times that of normal SPEEK membrane and 2.45 times that of Nafion 117 commercial membrane, respectively. Assembled into proton exchange membrane electrolysis hydrogen production membrane electrode (MEA) for testing, the results showed that when the voltage was 2.4 V, the current density of GSPEKK-10 membrane was 1000 mA/cm2. Compared with the 600 mA/cm2 and 400 mA/cm2 of normal SPEEK membrane and Nafion-117 membrane, its water electrolysis performance was significantly improved, which has potential industrialization prospects.

基金项目：

作者简介：

刘绪锟（1998-），男，山东省济宁市人，硕士，主要从事质子交换膜方向研究

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