Electrode Separators for the Next-Generation Alkaline Water Electrolyzers

David Aili; Mikkel Rykær Kraglund; Sinu C. Rajappan; Dmytro Serhiichuk; Yifan Xia; Valadoula Deimede; Joannis Kallitsis; Chulsung Bae; Patric Jannasch; Dirk Henkensmeier; Jens Oluf Jensen

doi:10.1021/acsenergylett.3c00185

Electrode Separators for the Next-Generation Alkaline Water Electrolyzers

David Aili^*, Mikkel Rykær Kraglund, Sinu C. Rajappan, Dmytro Serhiichuk, Yifan Xia, Valadoula Deimede^*, Joannis Kallitsis, Chulsung Bae^*, Patric Jannasch^*, Dirk Henkensmeier^*, Jens Oluf Jensen

^*Corresponding author for this work

Department of Energy Conversion and Storage

Research output: Contribution to journal › Review › peer-review

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Abstract

Multi-gigawatt-scale hydrogen production by water electrolysis is central in the green transition when it comes to storage of energy and forming the basis for sustainable fuels and materials. Alkaline water electrolysis plays a key role in this context, as the scale of implementation is not limited by the availability of scarce and expensive raw materials. Even though it is a mature technology, the new technological context of the renewable energy system demands more from the systems in terms of higher energy efficiency, enhanced rate capability, as well as dynamic, part-load, and differential pressure operation capability. New electrode separators that can support high currents at small ohmic losses, while effectively suppressing gas crossover, are essential to achieving this. This Focus Review compares the three main development paths that are currently being pursued in the field with the aim to identify the advantages and drawbacks of the different approaches in order to illuminate rational ways forward.

Original language	English
Journal	ACS Energy Letters
Volume	8
Issue number	4
Pages (from-to)	1900-1910
Number of pages	11
ISSN	2380-8195
DOIs	https://doi.org/10.1021/acsenergylett.3c00185
Publication status	Published - 2023

Bibliographical note

This work was financially supported by Innovation Fund Denmark (grant agreement 9067-00055B, DREAME), the European Union’s Horizon 2020 Research and Innovation Action program (grant agreement 862509, NEXTAEC), and the Korea Institute of Science and Technology (KIST).

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title = "Electrode Separators for the Next-Generation Alkaline Water Electrolyzers",

abstract = "Multi-gigawatt-scale hydrogen production by water electrolysis is central in the green transition when it comes to storage of energy and forming the basis for sustainable fuels and materials. Alkaline water electrolysis plays a key role in this context, as the scale of implementation is not limited by the availability of scarce and expensive raw materials. Even though it is a mature technology, the new technological context of the renewable energy system demands more from the systems in terms of higher energy efficiency, enhanced rate capability, as well as dynamic, part-load, and differential pressure operation capability. New electrode separators that can support high currents at small ohmic losses, while effectively suppressing gas crossover, are essential to achieving this. This Focus Review compares the three main development paths that are currently being pursued in the field with the aim to identify the advantages and drawbacks of the different approaches in order to illuminate rational ways forward.",

author = "David Aili and Kraglund, {Mikkel Ryk{\ae}r} and Rajappan, {Sinu C.} and Dmytro Serhiichuk and Yifan Xia and Valadoula Deimede and Joannis Kallitsis and Chulsung Bae and Patric Jannasch and Dirk Henkensmeier and Jensen, {Jens Oluf}",

note = "This work was financially supported by Innovation Fund Denmark (grant agreement 9067-00055B, DREAME), the European Union{\textquoteright}s Horizon 2020 Research and Innovation Action program (grant agreement 862509, NEXTAEC), and the Korea Institute of Science and Technology (KIST).",

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AU - Aili, David

AU - Kraglund, Mikkel Rykær

AU - Rajappan, Sinu C.

AU - Serhiichuk, Dmytro

AU - Xia, Yifan

AU - Deimede, Valadoula

AU - Kallitsis, Joannis

AU - Bae, Chulsung

AU - Jannasch, Patric

AU - Henkensmeier, Dirk

AU - Jensen, Jens Oluf

N1 - This work was financially supported by Innovation Fund Denmark (grant agreement 9067-00055B, DREAME), the European Union’s Horizon 2020 Research and Innovation Action program (grant agreement 862509, NEXTAEC), and the Korea Institute of Science and Technology (KIST).

PY - 2023

Y1 - 2023

N2 - Multi-gigawatt-scale hydrogen production by water electrolysis is central in the green transition when it comes to storage of energy and forming the basis for sustainable fuels and materials. Alkaline water electrolysis plays a key role in this context, as the scale of implementation is not limited by the availability of scarce and expensive raw materials. Even though it is a mature technology, the new technological context of the renewable energy system demands more from the systems in terms of higher energy efficiency, enhanced rate capability, as well as dynamic, part-load, and differential pressure operation capability. New electrode separators that can support high currents at small ohmic losses, while effectively suppressing gas crossover, are essential to achieving this. This Focus Review compares the three main development paths that are currently being pursued in the field with the aim to identify the advantages and drawbacks of the different approaches in order to illuminate rational ways forward.

AB - Multi-gigawatt-scale hydrogen production by water electrolysis is central in the green transition when it comes to storage of energy and forming the basis for sustainable fuels and materials. Alkaline water electrolysis plays a key role in this context, as the scale of implementation is not limited by the availability of scarce and expensive raw materials. Even though it is a mature technology, the new technological context of the renewable energy system demands more from the systems in terms of higher energy efficiency, enhanced rate capability, as well as dynamic, part-load, and differential pressure operation capability. New electrode separators that can support high currents at small ohmic losses, while effectively suppressing gas crossover, are essential to achieving this. This Focus Review compares the three main development paths that are currently being pursued in the field with the aim to identify the advantages and drawbacks of the different approaches in order to illuminate rational ways forward.

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DO - 10.1021/acsenergylett.3c00185

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EP - 1910

JO - ACS Energy Letters

JF - ACS Energy Letters

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ER -

Electrode Separators for the Next-Generation Alkaline Water Electrolyzers

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