Date of Publication:2020-01-01

Journal:Membrane Science and Technology

Volume:40

Issue:5

Page Number:23-30,38

ISSN:1007-8924

Key Words:"piperidinium; aryl ether-free; alkaline stability; anion exchange membrane water electrolysis"

CN:62-1049/TB

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/cm~2 at 2.5Vunder 50℃and 1 mol/L KOH and the cell can run stably for about 33 hat current density of 200 mA/cm~2.The above results indicate that this membrane has a good application prospect in the field of alkaline water electrolysis.

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