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Pressurized alkaline electrolyser with high efficiency and wide operating range – the project RESelyser

Reissner, R. and Schiller, Günter and Guelzow, E. and Alvarez Gallego, Y. and Doyen, Wim and van Craenendonck, Bert and Vaes, J. and Bowen, J.R. (2015) Pressurized alkaline electrolyser with high efficiency and wide operating range – the project RESelyser. In: 5th European PEFC and H2 Forum 2015. European Fuel Cell Forum. 5th EUROPEAN PEFC & H2 FORUM, 30. Juni-3. Juli 2015, Luzern, Schweiz. ISBN 978-3-905592-19-1

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Abstract

The project RESelyser has developed high pressure, highly efficient, low cost alkaline water electrolysers that can be integrated with renewable energy power sources (RES) using an advanced membrane concept, highly efficient electrodes and a new three-compartment cell design. A new separator membrane with internal electrolyte feeding and an adapted design of the cell to improve mass transfer, especially gas evacuation has been investigated and demonstrated. Intermittent and varying load operation with RES has been addressed by improved electrode stability and a cell concept for increasing the gas purity of hydrogen and oxygen especially at partial load and high pressure operation. The results of the project will be presented: high performance electrodes with a plasma sprayed coating layer give an overpotential reduction of 330 mV compared to uncoated electrodes thus showing high performance and stability with low cost material. Detailed investigation of the electrode pore structure and microstructure at beginning of life and after operation shows possible degradation mechanisms. It was found that by feeding KOH solution from inside the internal compartment of a double layer diaphragm towards both the anolyte and catholyte compartments improves the gas purities of the cell significantly. The novel three-compartment cell concept using this double layer diaphragm was realized in single cells of 300 cm2 area and in a 10 kW stack. The research leading to these results has received funding from the European Union’s Seventh Framework Programme (FP7/2007-2013) for the Fuel Cells and Hydrogen Joint Technology Initiative under grant agreement n° [278732] 10.

Item URL in elib:https://elib.dlr.de/99701/
Document Type:Conference or Workshop Item (Speech)
Title:Pressurized alkaline electrolyser with high efficiency and wide operating range – the project RESelyser
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Reissner, R.regine.reissner (at) dlr.deUNSPECIFIED
Schiller, Günterguenter.schiller (at) dlr.deUNSPECIFIED
Guelzow, E.erich.guelzow (at) dlr.deUNSPECIFIED
Alvarez Gallego, Y.VITOUNSPECIFIED
Doyen, WimVITOUNSPECIFIED
van Craenendonck, BertHydrogenics EuropeUNSPECIFIED
Vaes, J.Hydrogenics EuropeUNSPECIFIED
Bowen, J.R.DTUUNSPECIFIED
Date:2015
Journal or Publication Title:5th European PEFC and H2 Forum 2015
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Editors:
EditorsEmail
Bucheli, O.forum@efcf.com
Publisher:European Fuel Cell Forum
ISBN:978-3-905592-19-1
Status:Published
Keywords:Wasserstoff; Elektrolyse; alkalisch
Event Title:5th EUROPEAN PEFC & H2 FORUM
Event Location:Luzern, Schweiz
Event Type:international Conference
Event Dates:30. Juni-3. Juli 2015
Organizer:European Fuel Cell Forum, Olivier Bucheli & Michael Spirig, Luzern
HGF - Research field:Energy
HGF - Program:Efficient Energy Conversion and Use (old)
HGF - Program Themes:other (old)
DLR - Research area:Energy
DLR - Program:E VG - Combustion and Gas Turbine Technologies
DLR - Research theme (Project):E - Materials for Energy Technology (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Reißner, Regine
Deposited On:24 Nov 2015 14:20
Last Modified:31 Jul 2019 19:56

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