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Pressurised alkaline electrolyser with high efficiency and wide operating range - The Project „RESelyser“

Reissner, R. and Schiller, G. and Guelzow, E. and Knöri, Torsten and Hosseiny, Seyed Schwan and Alvarez Gallego, Y. and Doyen, Wim and Funke, A. and Vaes, J. and Bowen, J.R. and Bentzen, J. J. and Joergensen, P.S. and Zhang, Wei (2014) Pressurised alkaline electrolyser with high efficiency and wide operating range - The Project „RESelyser“. Electrohypem Workshop, EmHyTec Conference, 11. Dez. 2014, Taormina, Italien.

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Abstract

The project RESelyser develops 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 cell design. A new separator membrane with internal electrolyte circulation and an adapted design of the cell to improve mass transfer, especially gas evacuation is investigated and demonstrated. Intermittent and varying load operation with RES is addressed by improved electrode stability and a cell concept for increasing the gas purity of hydrogen and oxygen especially at part load and high pressure operation. Some recent results 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. Detailed investigation of the electrode pore structure and microstructure at beginning of life and after operation shows possible degradation mechanisms. A double layer diaphragm with internal KOH supply improves the gas purity and high current density performance of the cell. The cell concept was realizes in single cells of 300 cm2 area and 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/96231/
Document Type:Conference or Workshop Item (Speech)
Title:Pressurised 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, G.guenter.schiller (at) dlr.deUNSPECIFIED
Guelzow, E.erich.guelzow (at) dlr.deUNSPECIFIED
Knöri, Torstentorsten.knoeri (at) dlr.deUNSPECIFIED
Hosseiny, Seyed Schwanseyed.hosseiny (at) dlr.deUNSPECIFIED
Alvarez Gallego, Y.VITOUNSPECIFIED
Doyen, WimVITOUNSPECIFIED
Funke, A.Hydrogenics EuropeUNSPECIFIED
Vaes, J.Hydrogenics EuropeUNSPECIFIED
Bowen, J.R.DTUUNSPECIFIED
Bentzen, J. J.DTUUNSPECIFIED
Joergensen, P.S.DTUUNSPECIFIED
Zhang, WeiDTUUNSPECIFIED
Date:11 December 2014
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Elektrolyse Elektroden Membran
Event Title:Electrohypem Workshop, EmHyTec Conference
Event Location:Taormina, Italien
Event Type:international Conference, Workshop
Event Dates:11. Dez. 2014
Organizer:CNR-ITAE Dr. Squadrito
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:11 May 2015 14:01
Last Modified:01 Dec 2018 19:51

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