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聚（三联苯-二苯基芴哌啶）膜制备及其AEMWE性能研究

作者：陈蔚然，刘欢，葛倩倩

单位：安徽大学化学化工学院，合肥 230601

关键词：阴离子交换膜；自由体积分数；电解水制氢；离子电导率；尺寸稳定性

DOI号： 10.16159/j.cnki.issn1007-8924.2026.02.008

分类号： TQ317; TQ151.1+6

出版年,卷(期):页码： 2026,46(2):79-87

摘要：

阴离子交换膜水电解（AEMWE）是绿氢制取的关键技术。然而，其核心部件——阴离子交换膜仍然面临高离子电导率与尺寸稳定性无法兼顾的瓶颈。针对这一难题，本研究通过超酸催化法制备了聚（三联苯二苯基芴哌啶）膜，利用刚性的二苯基芴单元提升膜的自由体积，促进哌啶阳离子聚集成宽阔、贯通的亲水通道，提升离子电导率；同时，利用该单元的刚性约束作用，抑制膜的过度吸水溶胀。80 ℃下膜QDPA5的离子电导率高达144.3 mS/cm, 线性溶胀率仅为13.6%。将其组装膜电极用于AEMWE中，80 ℃、2 V电压下电流密度达710 mA/cm2，在1 mol/L KOH电解液、60 ℃、500 mA/cm2电流密度下运行200 h，电压衰减率小于0.1 mV/h。

Anion exchange membrane water electrolysis (AEMWE) is a key technology for green hydrogen production. However, the core component - anion exchange membranes are still encountered with the trade-off effect between the high ionic conductivity and robust dimensional stability. Herein, poly(terphenyl-co-diphenylfluorene piperidinium) membranes via superacid catalysis were prepared. The rigid diphenylfluorene unit was incorporated to increase the free volume of resulting membranes to promote the aggregation of piperidinium cations into wide and interconnected hydrophilic channels to improve the ionic conductivity. At the same time, the rigid constraint of the diphenylfluorene unit was believed to inhibit the excessive water swelling. As a result, the hydroxide conductivity of membrane QDPA5 was as high as 144.3 mS/cm with the low linear swelling ratio of 13.6% at 80 ℃. membrane QDPA5 was assembled in a membrane electrode assembly and applied for AEMWE. The current density reached 710 mA/cm2 at a voltage of 2 V and 80 ℃, and the voltage attenuation rate was less than 0.1 mV/h over 200 h at a current density of 500 mA/cm2 with 1 mol/L KOH as the feed solution at 60 ℃.

基金项目：

安徽省自然科学基金面上项目（2308085MB59）；安徽省科协青年科技人才托举计划（RCTJ202402）

作者简介：

陈蔚然（2002-），女，安徽合肥人，硕士研究生，研究方向为水电解池用碱性膜材料

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