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Manufacturing of Metal Foam Supported SOFCs with Graded Ceramic Layer Structure and Thinfilm Electrolyte

Han, Feng and Semerad, Robert and Constantin, Guillaume and Dessemond, Laurent and Costa, Rémi (2015) Manufacturing of Metal Foam Supported SOFCs with Graded Ceramic Layer Structure and Thinfilm Electrolyte. In: 2015 ICACC Proceedings. 39th International Conference & Exposition on Advanced Ceramics & Composites, 25.-30. Jan. 2015, Daytona Beach, USA.

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Manufacturing of thin and gas tight electrolyte is still a challenging issue for metal supported solid oxide fuel cells (SOFCs). In this work, we present a porosity graded multi-layer structure supporting thin-film electrolyte. The substrate is made of NiCrAl metal foam impregnated with La-substituted SrTiO3 (LST) ceramic. Furthermore, a 20 µm thick composite anode functional layer with LST and gadolinium doped ceria (GDC) was deposited onto the substrate. The surface of the anode functional layer is later engineered with a suspension of nano-particles with 40 nm average particle size of yttria-stabilized zirconia (YSZ). This results in a mesoporous layer with smooth surface able to support a thin film GDC layers. Finally, a gas-tight GDC electrolyte was deposited by EB-PVD method. The thickness of the thin-film YSZ layer and the gas-tight GDC layer was approximately 1 µm and 2 µm, respectively. Button half cells with size up to 25 cm2 were produced showing an air leakage rate down to 7.0*10-4 (hPa*dm3)/(s*cm2), satisfying the gas-tightness quality control threshold of the state of the art metal supported SOFCs at DLR. Full cells with LSCF cathodes were then produced and electrochemically tested. Results will be presented and discussed in this paper.

Item URL in elib:https://elib.dlr.de/100092/
Document Type:Conference or Workshop Item (Speech)
Title:Manufacturing of Metal Foam Supported SOFCs with Graded Ceramic Layer Structure and Thinfilm Electrolyte
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Han, Fengfeng.han (at) dlr.deUNSPECIFIED
Semerad, RobertCeracoUNSPECIFIED
Constantin, GuillaumeUniversité Grenoble AlpesUNSPECIFIED
Dessemond, LaurentUniversité Grenoble AlpesUNSPECIFIED
Costa, Rémiremi.costa (at) dlr.deUNSPECIFIED
Date:January 2015
Journal or Publication Title:2015 ICACC Proceedings
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords:metal foam, thin-film, electrolyte
Event Title:39th International Conference & Exposition on Advanced Ceramics & Composites
Event Location:Daytona Beach, USA
Event Type:international Conference
Event Dates:25.-30. Jan. 2015
Organizer:The American Ceramic Society
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), E - Electrochemical Processes (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics
Deposited By: Han, Feng
Deposited On:30 Nov 2015 12:34
Last Modified:31 Jul 2019 19:56

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