reviewChemical ReviewsApr 26, 2024HYBRID OA

Separators and Membranes for Advanced Alkaline Water Electrolysis

DHDirk HenkensmeierWCWon Chul ChoPJPatric JannaschJSJelena StojadinovićQLQingfeng Li

Korea University · Korea Institute of Science and Technology · +5 more institutions

PubMed
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Abstract

Traditionally, alkaline water electrolysis (AWE) uses diaphragms to separate anode and cathode and is operated with 5-7 M KOH feed solutions. The ban of asbestos diaphragms led to the development of polymeric diaphragms, which are now the state of the art material. A promising alternative is the ion solvating membrane. Recent developments show that high conductivities can also be obtained in 1 M KOH. A third technology is based on anion exchange membranes (AEM); because these systems use 0-1 M KOH feed solutions to balance the trade-off between conductivity and the AEM's lifetime in alkaline environment, it makes sense to treat them separately as AEM WE. However, the lifetime of AEM increased strongly over the…

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270
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41.49
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100%
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358
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Authors

7

Topics & keywords

Topics
Keywords
  • Chemistry
  • Electrolysis
  • Membrane
  • Alkaline water electrolysis
  • Chemical engineering
  • Biochemistry
  • Physical chemistry
  • Electrolyte
UN Sustainable Development Goals
  • Clean water and sanitation
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