Electrical Contact Material in High-Temperature Electrochemical Devices
AssigneeThe Regents of the University of California
InventorsMichael C. Tucker, Lutgard C. DeJonghe
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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 were added to LSM and SSC. The important properties of the resulting composites, including conductivity, sintering behavior, CTE, and adhesion to LSCF and MCO-coated 441 stainless steel were used as screening parameters. The most promising CCM/glass composites were coated onto MCO-coated 441 stainless steel substrates and subjected to ASR testing at 800° C. In all cases, ASR is found to be acceptable. Indeed, addition of glass is found to improve bonding of the CCM layer without sacrificing acceptable conductivity.
Claims26
A method comprises the steps of:
- a) mixing an electrically conductive material with a bonding aid to form a mixture
- b) applying the mixture so that it contacts an electrode of a high temperature electrochemical device and an interconnect, and optionally a metal member;
- and, thereafter
- c) drying, curing or firing the combined materials to bond the mixture to the electrode and interconnect.
A cathode contact material comprising a mixture of a conductive material and glass.
A cathode contact material comprising a mixture of a conductive material and inorganic binder.
Dependencies are inferred from the claim text.