Membrane Science and Technology

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Preparation and properties of piperidinium functionalized poly（aryl isatin） membrane for water electrolysis

Authors： YANG Xiong, YAN Xiaoming, HE Gaohong

Units： School of Petroleum and Chemical Engineering, Dalian University of Technology, Panjin, Liaoning 124221, China

KeyWords： piperidinium; aryl ether-free; alkaline stability; anion exchange membrane water electrolysis

ClassificationCode：TM911.3;TQ425.236

year,volume(issue):pagination： 2020, 40(5):23-30

Abstract：

The aryl ether-free poly(aryl isatin) polymer was successfully synthesized via simple and controllable acid-catalyzed polycondensation reaction of p-Terphenyl and isatin, and then followed the quaternary ammonium functionalized reaction with 1-(6-bromohexyl)-1-methylpiperidinium ammonium bromide to prepare piperidinium functionalized poly（aryl isatin） anion exchange membranes for hydrogen production by alkaline water electrolysis. The membrane showed a ionic conductivity of 33 mS/cm at 30 ℃. The ion exchange capacity can remain 85% of the initial value after the membrane was immersed in 1 mol/L KOH solution at 80 ℃ for 774 h, moreover, no obvious changes in chemical structure happened, showing good alkaline stability. The cell based on this membrane presented a current density of 312 mA/cm2 at 2.5 V under 50 ℃ and 1 mol/L KOH and the cell can run stably for about 33 h at current density of 200 mA/cm2. The above results indicate that this membrane has a good application prospect in the field of alkaline water electrolysis.

Funds：

国家自然科学基金重点项目（U1663223）

AuthorIntro：

杨雄（1994-），男，湖北省仙桃市人，硕士生，主要从事电解池碱性阴离子交换膜的制备与性能研究。

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