Development of metal-coated ceramic anodes for molten carbonate fuel cells [electronic resource].

Published:: Washington, D.C. : United States. Dept. of Energy, 1990.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:: Pages: (106 pages) : digital, PDF file
Additional Creators:: United States. Department of Energy and United States. Department of Energy. Office of Scientific and Technical Information

Access Online

www.osti.gov

Availability

Finding items...

Restrictions on Access:

Free-to-read Unrestricted online access

Summary:

This report documents the developmental efforts on metal coating of various ceramic substrates (LiAlO₂, SrTiO₃, and LiFeO₂) and the critical issues associated with fabricating anodes using metal-coated LiAlO₂ substrates. Electroless Ni and Cu coating technology was developed to achieve complete metal coverage on LiAlO₂ powder substrates. Metal coated SrTiO₃ powders were fabricated into anodes by a process identical to that reported in the GE literature. Microstructural examination revealed that the grains of the ceramic had fused together, with the metal having dewetted from the surface of the ceramic. Alternate substrates that might allow for better wetting of the metal on the ceramic such as LiFeO₂ and Li₂MnO₃ were identified. Cu/Ni-coated (50:50 mol ratio, 50 w/o metal loading) LiFeO₂ anodes were optimized to meet the MCFC anode specifications. Metal-coated gamma-LiAlO₂ substrates were also developed. By using suitable chemical surface modification methods, the gamma-UAlO₂ substrate surface may be modified to allow a stable metal coated anode to be fabricated. Creep testing of the metal coated ceramic anodes were conducted at IGT. It was determined that the predominant creep mechanism is due to particle rearrangement. The anode porosity, and mean pore size had significant effect on the creep of the anode. Lower porosity and pore size consistent with performance criteria are desired to reduce creep. Lower metal loading with uniformity of coverage will result in lower creep behavior of the anode. Of the two substrates evaluated, LiFeO₂ in general exhibited lower creep which was attributed to superior metal adhesion.

Report Numbers:

E 1.99:doe/mc/22194-3001
doe/mc/22194-3001

Subject(s):

Direct Energy Conversion

Other Subject(s):

Note:

Published through SciTech Connect.
03/01/1990.
"doe/mc/22194-3001"
"DE91002082"
Marianowski, L.G.; Khandkar, A.C.; Elangovan, S.
Ceramatec, Inc., Salt Lake City, UT (United States)

Funding Information:

AC21-85MC22194

View MARC record | catkey: 14067968