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Evaluation of Performance and Degradation Profiles of a Metal Supported Solid Oxide Fuel Cell Under Electrolysis Operation

Nechache, Aziz and Han, Feng and Semerad, Robert and Schiller, Günter and Costa, Rémi (2017) Evaluation of Performance and Degradation Profiles of a Metal Supported Solid Oxide Fuel Cell Under Electrolysis Operation. ECS Transactions, 78 (1), pp. 3039-3047. Electrochemical Society, Inc.. DOI: 10.1149/07801.3039 ISSN 1938-5862

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In the context of energy transition, the use of renewable energies through the conversion of different resources with promising technologies into storable energy carriers is of eminent importance for a sustainable energy supply. Hydrogen production from steam using solid oxide electrolysis cells (SOEC) is part of this so called “energy mix”. Recently, promising progress appeared from the investigation of metal supports in the solid oxide cell architecture. Metal-supported solid oxide fuel cells (MS-SOFCs) show not only good mechanical strength, relatively low operating temperature (500-750°C) and improved sealing capability but also low materials cost and tolerance towards rapid thermal cycling and redox cycling (1-3). In the present study, a MS-SOFC was tested under electrolysis conditions. The cell consisted of Ni-catalyst loaded La0.1Sr0.9TiO3-α/gadolinium-doped ceria (Ni-LST/GDC) as fuel electrode, gadolinium-doped ceria / yttrium-stabilized zirconia (GDC/YSZ) as electrolyte and La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) as O2 electrode. The cell was first tested in fuel cell mode under different gas compositions. Subsequently, a first evaluation of the cell performance profile in electrolysis mode was performed. Thus, a series of current-voltage curves as well as impedance diagrams (under OCV and under load) was recorded. Furthermore, degradation under electrolysis operation was also investigated based on the evolution of the cell voltage against time.

Item URL in elib:https://elib.dlr.de/115420/
Document Type:Article
Title:Evaluation of Performance and Degradation Profiles of a Metal Supported Solid Oxide Fuel Cell Under Electrolysis Operation
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Nechache, Azizaziz.nechache (at) dlr.deUNSPECIFIED
Han, FengFeng.Han (at) dlr.dehttps://orcid.org/0000-0003-1904-134X
Semerad, RobertceracoUNSPECIFIED
Schiller, GünterGuenter.Schiller (at) dlr.dehttps://orcid.org/0000-0001-5093-7625
Costa, Rémiremi.costa (at) dlr.dehttps://orcid.org/0000-0002-3534-1935
Journal or Publication Title:ECS Transactions
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
DOI :10.1149/07801.3039
Page Range:pp. 3039-3047
Singhal, Subhash C.UNSPECIFIED
Kawada, TatsuyaUNSPECIFIED
Publisher:Electrochemical Society, Inc.
Keywords:Metal-supported SOFC, electrolysis operation, Ni-LST/GDC fuel electrode, impedance spectroscopy, degradation
HGF - Research field:Energy
HGF - Program:Storage and Cross-linked Infrastructures
HGF - Program Themes:Electrolysis and Hydrogen
DLR - Research area:Energy
DLR - Program:E SP - Energy Storage
DLR - Research theme (Project):E - Elektrochemical Processes (Electrolysis)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Schiller, Dr.rer.nat. Günter
Deposited On:01 Dec 2017 14:56
Last Modified:06 Sep 2019 15:24

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