Journal Article

FZJ-2017-06888

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png High-Performance Metal-Supported Solid Oxide Fuel Cells by Advanced Cathode Processing

Udomsilp, D. (Corresponding author)FZJ* ; Roehrens, D. ; Menzler, N. H.FZJ* ; Bischof, C. ; de Haart, L. G. J.FZJ* ; Opitz, A. K. ; Guillon, O.FZJ* ; Bram, M.FZJ*

2017
Electrochemical Soc. Pennington, NJ

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Please use a persistent id in citations: http://hdl.handle.net/2128/15562  doi:10.1149/2.0571713jes

Abstract: La0.58Sr0.4Co0.2Fe0.8O3-δ (LSCF) cathodes on metal-supported solid oxide fuel cells (MSCs) were fabricated by a novel sinteringapproach and electrochemically tested in single-cell measurements. The sintering of cathodes on complete cells was performedunder argon atmosphere at 950◦C in order to prevent strong oxidation of the metallic support. During this sintering process, aphase decomposition of LSCF occurred, which was found to be reversible upon heating in ambient air. The observed performanceincrease of MSCs with cathodes sintered ex situ, compared to cells processed under standard conditions, revealed a beneficial effectof the increased sintering temperature on cell performance. At 750◦C and 0.7 V a current density of 0.96 A/cm2 was achieved.A stronger adherence of the cathodes sintered ex situ was observed after single-cell measurements. In additional experiments,La0.58Sr0.4CoO3-δ (LSC) was applied as an alternative cathode for MSCs. These cells were activated in situ at 850◦C due to thelower thermochemical stability of LSC and indicated potential for further improvement of the cell performance. The successfulelectrochemical characterization of the cells with LSCF cathodes sintered ex situ confirmed the applicability of the novel sinteringprocedure as well as the improved adherence achieved by the optimized processing.

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Contributing Institute(s):

1. Werkstoffsynthese und Herstellungsverfahren (IEK-1)
2. Grundlagen der Elektrochemie (IEK-9)
3. JARA-ENERGY (JARA-ENERGY)

Research Program(s):

1. 135 - Fuel Cells (POF3-135) (POF3-135)
2. SOFC - Solid Oxide Fuel Cell (SOFC-20140602) (SOFC-20140602)
3. HITEC - Helmholtz Interdisciplinary Doctoral Training in Energy and Climate Research (HITEC) (HITEC-20170406) (HITEC-20170406)

Appears in the scientific report 2017

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Database coverage:
; ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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