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

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

TitleGlass-containing composite cathode contact materials for solid oxide fuel cells
Publication TypeJournal Article
Year of Publication2011
AuthorsMichael C Tucker, Lei Cheng, Lutgard C De Jonghe
JournalJournal of Power Sources
Volume196
Issue20
Pagination8435 - 8443
Date Published10/2011
ISSN03787753
KeywordsASR, Cathode contact, CCM, fuel cell, SOFC
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.

DOI10.1016/j.jpowsour.2011.05.055
Short TitleJournal of Power Sources