Kraglund, Mikkel Rykaer and Carmo, Marcelo and Schiller, Günter and Ansar, Syed Asif and Aili, David and Christensen, Erik and Jensen, Jens Oluf (2019) Ion-solvating membranes as a new approach towards high rate alkaline electrolyzers. Energy & Environmental Science. Royal Society of Chemistry. doi: 10.1039/c9ee00832b. ISSN 1754-5692.
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Abstract
Energy efficient and cost efficient water electrolysis is essential for the large scale implementation of renewable energy. The two commercial low temperature electrolyzer technologies each suffer from serious drawbacks. The proton exchange membrane (PEM) electrolyzers remain expensive and depend strongly on the scarce metal iridium. The alkaline electrolyzers suffer from a large footprint due to low rate capability. Here, we present an approach to make an alkaline electrolyzer perform like a PEM electrolyzer by means of an ion-solvating membrane. A long lasting effort to replace the state-of-the-art thick porous diaphragm by an anion exchange membrane has not proven successful. The ion-solvating membrane represents a third way. Demonstration cells based on KOH doped polybenzimidazole membranes and nickel based electrodes exhibited 1700 mA cm-2 at 1.8 V. This is far exceeding what has previously been achieved with membranes in alkaline environments without platinum group metal catalysts, and is comparable to state-of-the-art PEM electrolyzers.
Item URL in elib: | https://elib.dlr.de/128645/ | ||||||||||||||||||||||||||||||||
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Document Type: | Article | ||||||||||||||||||||||||||||||||
Title: | Ion-solvating membranes as a new approach towards high rate alkaline electrolyzers | ||||||||||||||||||||||||||||||||
Authors: |
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Date: | 22 July 2019 | ||||||||||||||||||||||||||||||||
Journal or Publication Title: | Energy & Environmental Science | ||||||||||||||||||||||||||||||||
Refereed publication: | Yes | ||||||||||||||||||||||||||||||||
Open Access: | Yes | ||||||||||||||||||||||||||||||||
Gold Open Access: | No | ||||||||||||||||||||||||||||||||
In SCOPUS: | Yes | ||||||||||||||||||||||||||||||||
In ISI Web of Science: | Yes | ||||||||||||||||||||||||||||||||
DOI: | 10.1039/c9ee00832b | ||||||||||||||||||||||||||||||||
Editors: |
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Publisher: | Royal Society of Chemistry | ||||||||||||||||||||||||||||||||
Series Name: | Energy & Environmental Science | ||||||||||||||||||||||||||||||||
ISSN: | 1754-5692 | ||||||||||||||||||||||||||||||||
Status: | Published | ||||||||||||||||||||||||||||||||
Keywords: | Alkaline water electrolysis, ion-solvating membrane, Raney nickel-type plasma sprayed electrodes, high-performance electrolyzer, energy-efficiency | ||||||||||||||||||||||||||||||||
HGF - Research field: | Energy | ||||||||||||||||||||||||||||||||
HGF - Program: | Storage and Cross-linked Infrastructures | ||||||||||||||||||||||||||||||||
HGF - Program Themes: | Fuel cells | ||||||||||||||||||||||||||||||||
DLR - Research area: | Energy | ||||||||||||||||||||||||||||||||
DLR - Program: | E SP - Energy Storage | ||||||||||||||||||||||||||||||||
DLR - Research theme (Project): | E - Electrochemical Processes (Fuel Cells) (old) | ||||||||||||||||||||||||||||||||
Location: | Stuttgart | ||||||||||||||||||||||||||||||||
Institutes and Institutions: | Institute of Engineering Thermodynamics > Electrochemical Energy Technology | ||||||||||||||||||||||||||||||||
Deposited By: | Schiller, Dr.rer.nat. Günter | ||||||||||||||||||||||||||||||||
Deposited On: | 23 Aug 2019 15:41 | ||||||||||||||||||||||||||||||||
Last Modified: | 01 Sep 2021 03:00 |
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