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Beyond the 3rd Generation of Planar SOFC: Development of Metal Foam Supported Cells with Thin Film Electrolyte

Han, Feng and Semerad, Robert and Constantin, Guillaume and Dessemond, Laurent and Costa, Rémi (2015) Beyond the 3rd Generation of Planar SOFC: Development of Metal Foam Supported Cells with Thin Film Electrolyte. In: ECS Transactions, pp. 1889-1896. SOFC XIV, 26.-31. Juli 2015, Glasgow, UK. DOI: 10.1149/06801.1889ecst

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Abstract

The manufacturing of thin and gas tight electrolyte in solid oxide fuel cells (SOFCs) remains challenging especially when alloys are used for the substrate. In this work, we present a porosity graded multi-layer structure supporting thin film electrolyte, as a further evolution of the metal supported planar cell architecture. The substrate is made of NiCrAl metal foam impregnated with La0.1Sr0.9TiO3-α (LST) ceramic. Furthermore, a 20 μm thick composite anode functional layer with LST and Gd0.1Ce0.9O2-α (GDC) was deposited onto the substrate. The surface of the anode functional layer is later engineered with a suspension of nanoparticles with 40 nm average particle size of yttria-stabilized zirconia (YSZ). This results in a mesoporous layer with a smooth surface. Finally, a gas-tight GDC electrolyte was deposited by EBPVD method. The thickness of the thin-film YSZ layer and the gas-tight CGO layer was approximately 1 μm and 2 μm, respectively. Button half cells with size up to 25cm² were successfully produced showing an air leakage rate down to 0.7 Pa·m·s-1 satisfying the gas-tightness quality control threshold of the state of the art metal supported SOFCs at DLR. Full cells with La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) cathodes showed an OCV of 0.97 V at 750°C and power density of about 80mW/cm² was obtained at 0.7 V.

Item URL in elib:https://elib.dlr.de/98805/
Document Type:Conference or Workshop Item (Speech)
Title:Beyond the 3rd Generation of Planar SOFC: Development of Metal Foam Supported Cells with Thin Film Electrolyte
Authors:
AuthorsInstitution or Email of AuthorsAuthors 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:2015
Journal or Publication Title:ECS Transactions
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
DOI :10.1149/06801.1889ecst
Page Range:pp. 1889-1896
Status:Published
Keywords:SOFC, thin films, metal supported, nano particles
Event Title:SOFC XIV
Event Location:Glasgow, UK
Event Type:international Conference
Event Dates:26.-31. Juli 2015
HGF - Research field:Energy
HGF - Program:Efficient Energy Conversion and Use (old)
HGF - Program Themes:Fuel Cells (old)
DLR - Research area:Energy
DLR - Program:E EV - Energy process technology
DLR - Research theme (Project):E - Electrochemical Processes (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Costa, Dr Rémi
Deposited On:03 Nov 2015 08:36
Last Modified:03 Nov 2015 08:36

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