Issue 30, 2022

Anion exchange membrane water electrolysis using Aemion™ membranes and nickel electrodes

Abstract

Anion exchange membrane water electrolysis (AEMWE) is a potentially low-cost and sustainable technology for hydrogen production that combines the advantages of proton exchange membrane water electrolysis and traditional alkaline water electrolysis systems. Despite considerable research efforts in recent years, the medium-term (100 h) stability of Aemion™ membranes needs further investigation. This work explores the chemical and electrochemical durability (>100 h) of Aemion™ anion exchange membranes in a flow cell using nickel felt as the electrode material on the anode and cathode sides. Remixing the electrolytes between the AEMWE galvanostatic tests was very important to enhance electrolyte refreshment and the voltage stability of the system. The membranes were analyzed by NMR spectroscopy after the AEMWE tests, and the results showed no sign of severe chemical degradation. In a separate experiment, the chemical stability and mechanical integrity of the membranes were studied by soaking them in a strongly alkaline electrolyte for a month (>700 h) at 90 °C, followed by NMR analysis. A certain extent of ionic loss was observed due to chemical degradation and the membranes disintegrated into small pieces.

Graphical abstract: Anion exchange membrane water electrolysis using Aemion™ membranes and nickel electrodes

Supplementary files

Article information

Article type
Paper
Submitted
23 Apr 2022
Accepted
04 Jul 2022
First published
05 Jul 2022
This article is Open Access
Creative Commons BY license

J. Mater. Chem. A, 2022,10, 16061-16070

Anion exchange membrane water electrolysis using Aemion™ membranes and nickel electrodes

A. Khataee, A. Shirole, P. Jannasch, A. Krüger and A. Cornell, J. Mater. Chem. A, 2022, 10, 16061 DOI: 10.1039/D2TA03291K

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