Journal Article

PreJuSER-9300

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Y-substituted SrTiO3-YSZ composites as anode materials for solid oxide fuel cells: Interaction between SYT and YSZ

Ma, Q.FZJ* ; Tietz, F.FZJ* ; Sebold, D.FZJ* ; Stöver, D.FZJ*

2010
Elsevier New York, NY [u.a.]

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Please use a persistent id in citations: doi:10.1016/j.jpowsour.2009.09.075

Abstract: Donor-substituted SrTiO3 ceramic materials were investigated as the anodes of solid oxide fuel cells (SOFCs). Sr0.89Y0.07TiO3-delta (SYT) samples with good electrical conductivity and redox stability were prepared. The thermal and chemical expansions of SYT are both compatible with YSZ electrolyte. Half cells consisting of a flat anode substrate and an electrolyte layer with outer dimensions of 5 cm x 5 cm were fabricated, Ni particles were infiltrated on the pore walls within the ceramic anode framework, and the redox stability of the half cell was tested by He leakage tests after redox cycling. Ti diffusion but no Sr migration was found between the anode and electrolyte layers. Sr0.895Y0.07TiO3+/-delta (x = 1.00-1.20)-YSZ composites with a Volume ratio 2:1 were prepared to investigate the influences of this interdiffusion between YSZ and SYT materials. The results indicate that the conductivity of SYT decreases because of the Ti diffusion, and a small amount of Ti excess can solve this problem. (C) 2009 Elsevier B.V. All rights reserved.

Keyword(s): J ; Ceramic (auto) ; Donor-doped strontium titanate (auto) ; Solid oxide fuel cells (auto) ; Anode material (auto) ; Electrical conductivity (auto)

Note: The authors thank Dr. W. Fischer (FZJ-IEF1) and Mr. M. Ziegner (FZJ-IEF 2) for XRD measurements, and the whole technical staff of FZJ-IEF1 for experimental assistance. Financial support from the European Commission under contract no. SES6-CT-2006-020089 of the Integrated Project "SOFC600" is gratefully acknowledged.

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Contributing Institute(s):

1. Werkstoffsynthese und Herstellungsverfahren (IEF-1)
2. Jülich-Aachen Research Alliance - Energy (JARA-ENERGY)

Research Program(s):

1. Rationelle Energieumwandlung (P12)
2. SOFC - Solid Oxide Fuel Cell (SOFC-20140602) (SOFC-20140602)

Appears in the scientific report 2010

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