Silver Composites As Highly Stable Cathode Current Collectors for Solid Oxide Fuel Cells
Time stability of the solid oxide fuel cells (SOFCs) has been a significant concern toward realization of their practical applications. Its operation at elevated temperatures and in oxidizing atmospheres makes the cathode current collector one of the most vulnerable components of the SOFCs. Silver and silver-based metal oxide [lanthanum-strontium manganite (LSM) and yttria-stabilized zirconia] composites were investigated for the development of low-cost current collectors with long-term stability. While densification of pure silver limited its use as current collector, incorporation of oxide particles to the silver matrix led to formation of porous composites. However, addition of YSZ particles did not result in a stable porosity. Analysis of the impedance spectra allowed further investigations on the obtained microstructures and the formed contacts. No microstructural degradation has been observed in the porous Ag-LSM composite current collector and its electrical properties remained stable for over 5000 h of measurements at 800 °C in air.
A. Sarikaya et al., "Silver Composites As Highly Stable Cathode Current Collectors for Solid Oxide Fuel Cells," Journal of Materials Research, vol. 27, no. 15, pp. 2024-2029, Materials Research Society (MRS), Aug 2012.
The definitive version is available at http://dx.doi.org/10.1557/jmr.2012.175
Materials Science and Engineering
Keywords and Phrases
Cathode current collectors; Elevated temperature; Impedance spectrum; Long term stability; Metal oxides; Microstructural degradation; Oxide particles; Oxidizing atmosphere; Porous composites; Silver composites; Time stability, Cathodes; Degradation; Electric current collectors; Electric properties; Magnetrons; Manganese oxide; Metallic compounds; Secondary batteries; Solid oxide fuel cells (SOFC); Strontium; Yttria stabilized zirconia; Zirconia; Silver
International Standard Serial Number (ISSN)
Article - Journal
© 2012 Materials Research Society (MRS), All rights reserved.