膜科学与技术

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Preparation and properties of poly(terphenyl-co-diphenylfluorene piperidinium)
membranes for AEMWE

Authors： CHEN Weiran, LIU Huan, GE Qianqian

Units： School of Chemistry and Chemical Engineering, Anhui University, Hefei 230601, China

KeyWords： anion exchange membranes; fractional free volume; water electrolysis for hydrogen production; ionic conductivity; dimensional stability

ClassificationCode：TQ317; TQ151.1+6

year,volume(issue):pagination： 2026,46(2):79-87

Abstract：

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 ℃.

Funds：

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）

AuthorIntro：

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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