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Separators and Membranes for Advanced Alkaline Water Electrolysis

Henkensmeier, Dirk ; Cho, Won-Chul ; Jannasch, Patric LU orcid ; Stojadinovic, Jelena ; Li, Qingfeng ; Aili, David and Jensen, Jens Oluf (2024) In Chemical Reviews
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
... (More)
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 last 10 years, and some electrode-related
issues like oxidation of the ionomer binder at the anode can be
mitigated by using KOH feed solutions. Therefore, AWE and AEM WE may get
more similar in the future, and this review focuses on the developments
in polymeric diaphragms, ion solvating membranes, and AEM. (Less)
Please use this url to cite or link to this publication:
author
; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
epub
subject
in
Chemical Reviews
pages
51 pages
publisher
The American Chemical Society (ACS)
ISSN
1520-6890
DOI
10.1021/acs.chemrev.3c00694
language
English
LU publication?
yes
id
835255be-516e-42c5-aa93-9baf3fa63880
date added to LUP
2023-09-27 09:20:39
date last changed
2024-04-29 14:28:37
@article{835255be-516e-42c5-aa93-9baf3fa63880,
  abstract     = {{Traditionally, alkaline water electrolysis (AWE) uses diaphragms to <br>
separate anode and cathode and is operated with 5–7 M KOH feed <br>
solutions. The ban of asbestos diaphragms led to the development of <br>
polymeric diaphragms, which are now the state of the art material. A <br>
promising alternative is the ion solvating membrane. Recent developments<br>
 show that high conductivities can also be obtained in 1 M KOH. A third <br>
technology is based on anion exchange membranes (AEM); because these <br>
systems use 0–1 M KOH feed solutions to balance the trade-off between <br>
conductivity and the AEM’s lifetime in alkaline environment, it makes <br>
sense to treat them separately as AEM WE. However, the lifetime of AEM <br>
increased strongly over the last 10 years, and some electrode-related <br>
issues like oxidation of the ionomer binder at the anode can be <br>
mitigated by using KOH feed solutions. Therefore, AWE and AEM WE may get<br>
 more similar in the future, and this review focuses on the developments<br>
 in polymeric diaphragms, ion solvating membranes, and AEM.}},
  author       = {{Henkensmeier, Dirk and Cho, Won-Chul and Jannasch, Patric and Stojadinovic, Jelena and Li, Qingfeng and Aili, David and Jensen, Jens Oluf}},
  issn         = {{1520-6890}},
  language     = {{eng}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{Chemical Reviews}},
  title        = {{Separators and Membranes for Advanced Alkaline Water Electrolysis}},
  url          = {{http://dx.doi.org/10.1021/acs.chemrev.3c00694}},
  doi          = {{10.1021/acs.chemrev.3c00694}},
  year         = {{2024}},
}