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

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

Reissner, R. and Schiller, Günter and Guelzow, E. and Alvarez-Gallego, Yolanda 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: Energy, Science and Technology 2015. The energy conference for scientists and researchers. Book of Abstracts, EST, Energy Science Technology, International Conference & Exhibition, 20-22 May 2015, Karlsruhe, Germany. Karlsruher Institut für Technologie (KIT). EST Energy Science Technology, 20.-22. Mai 2015, Karlsruhe, Germany.

[img] PDF
81kB

Official URL: http://primo.bibliothek.kit.edu/primo_library/libweb/action/dlDisplay.do?vid=KIT&docId=KITSRCE1000044290&tab=kit_evastar&srt=date

Abstract

Introduction For wide-spread use of electrolysers for energy storage by converting surplus renewable electrical energy to hydrogen the main obstacles are the costs of the device and the limited adaptation to fluctuating power supply. To adress these points the project RESelyser has developed concepts and materials for 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. Discussion 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 lowcost 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 (E-bypass separator) was realized in single cells of 300 cm2 area and in a 10 kW stack. Conclusions and/or Outlook Despite being an old technique further improvements for alkaline electrolysers can still be achieved to make them better adapted to new applications in hydrogen fuelling and energy storage. For further information see www.reselyser.eu. Acknowledgement: 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/99690/
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, YolandaVITOUNSPECIFIED
Doyen, WimVITOUNSPECIFIED
van Craenendonck, BertHydrogenics EuropeUNSPECIFIED
Vaes, J.Hydrogenics EuropeUNSPECIFIED
Bowen, J.R.DTUUNSPECIFIED
Date:21 May 2015
Journal or Publication Title:Energy, Science and Technology 2015. The energy conference for scientists and researchers. Book of Abstracts, EST, Energy Science Technology, International Conference & Exhibition, 20-22 May 2015, Karlsruhe, Germany
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Editors:
EditorsEmail
UNSPECIFIEDKarlsruher Institut für Technologie (KIT)
Publisher:Karlsruher Institut für Technologie (KIT)
Status:Published
Keywords:Hydrogen; Electrolysis
Event Title:EST Energy Science Technology
Event Location:Karlsruhe, Germany
Event Type:international Conference
Event Dates:20.-22. Mai 2015
Organizer:Karlsruhe Institute of Technology
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 14:16
Last Modified:31 Jul 2019 19:56

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.