elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Ion-solvating membranes as a new approach towards high rate alkaline electrolyzers

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.

[img] PDF - Postprint version (accepted manuscript)
514kB

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/
Document Type:Article
Title:Ion-solvating membranes as a new approach towards high rate alkaline electrolyzers
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Kraglund, Mikkel RykaerTechnical University of Denmark (DTU)UNSPECIFIEDUNSPECIFIED
Carmo, MarceloForschungszentrum JülichUNSPECIFIEDUNSPECIFIED
Schiller, GünterUNSPECIFIEDhttps://orcid.org/0000-0001-5093-7625UNSPECIFIED
Ansar, Syed AsifUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Aili, DavidTechnical University of Denmark (DTU)UNSPECIFIEDUNSPECIFIED
Christensen, ErikTechnical University of Denmark (DTU)UNSPECIFIEDUNSPECIFIED
Jensen, Jens OlufTechnical University of Denmark (DTU)UNSPECIFIEDUNSPECIFIED
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:
EditorsEmailEditor's ORCID iDORCID Put Code
Lewis, NathanRoyal Society of ChemistryUNSPECIFIEDUNSPECIFIED
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

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Website and database design: Copyright © German Aerospace Center (DLR). All rights reserved.