Journal Article

FZJ-2019-02842

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Dual-Phase Cathodes for Metal-Supported Solid Oxide Fuel Cells: Processing, Performance, Durability

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

2019
Electrochemical Soc. Pennington, NJ

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Please use a persistent id in citations: http://hdl.handle.net/2128/22151  doi:10.1149/2.0561908jes

Abstract: Cathode processing is one of the main challenges in the manufacturing of metal-supported solid oxide fuel cells (MSCs). Cathodesintering in ambient air is not applicable to MSCs, as oxidation of the metal substrate and the metallic Ni of the anode damagesthe cell. A recently developed ex situ sintering procedure for the LSCF cathode in an argon atmosphere was shown to significantlyimprove cathode adherence. However, the stability of the sintered cathode layer posed a challenge during storage in ambient air. In thepresent work, adapting the ex situ sintering approach to LSC/GDC dual-phase cathodes not only enabled the ex situ sintering processto be applied to LSC-based cathodes, but also resulted in the superior stability of the cathode after sintering. Despite the hygroscopicproperties of the partially decomposed perovskite, LSC/GDC dual-phase cathodes were shown to withstand more than 1 year ofstorage in ambient air without failure. Electrochemical single-cell measurements and post-test analysis confirmed the reversibilityof phase transformations and the electrochemical activity of such dual-phase cathodes. Current densities of 1.30 A cm−2 at 750°C,0.85 A cm−2 at 700°C, and 0.54 A cm−2 at 650°C were obtained at a cell voltage of 0.7 V.

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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)

Appears in the scientific report 2019

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

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