Glass-containing composite cathode contact materials for solid oxide fuel cells

Date Published
10/2011
Publication Type
Journal Article
Authors
DOI
10.1016/j.jpowsour.2011.05.055
Abstract

The feasibility of adding glass to conventional SOFC cathode contact materials in order to improve bonding to adjacent materials in the cell stack is assessed. A variety of candidate glass compositions are added to LSM and SSC. The important properties of the resulting composites, including conductivity, sintering behavior, coefficient of thermal expansion, and adhesion to LSCF and Mn1.5Co1.5O4-coated 441 stainless steel are used as screening parameters. Adhesion of LSM to LSCF improved from 3.9 to 5.3 MPa upon addition of SCZ-8 glass. Adhesion of LSM to coated stainless steel improved from 1.8 to 3.9 MPa upon addition of Schott GM31107 glass. The most promising cathode contact material/glass composites are coated onto Mn1.5Co1.5O4-coated 441 stainless steel substrates and subjected to area-specific resistance testing at 800 °C. In all cases, area-specific resistance is found to be in the range 2.5–7.5 mOhm cm2 and therefore acceptable. Indeed, addition of glass is found to improve bonding of the cathode contact material layer without sacrificing acceptable conductivity.

Journal
Journal of Power Sources
Volume
196
Year of Publication
2011
Issue
20
Pagination
8435 - 8443
ISSN Number
03787753
Short Title
Journal of Power Sources
Keywords
Organizations
Research Areas
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