Cathode materials for the molten carbonate fuel cell

Conference · Sun Aug 01 00:00:00 EDT 1993

OSTI ID:10182776

Kucera, G H; Brown, A P; Roche, M F; Indacochea, E J; Krumpelt, M; Myles, K M

Both LiFeO{sub 2} and Li{sub 2},MnO{sub 3} were stable in the cathode environment, had low solubility, and were nonprecipitating in the anode environment. Dopants were employed to enhance the electronic conductivity of both materials. Cobalt-doped LiFeO{sub 2} was a factor of 30 more conductive than the undoped LiFeO{sub 2}; Nb-doped Li{sub 2}MnO{sub 3} was a factor of 60 more conductive than its undoped form. However, only the Co-doped LiFeO{sub 2} Li{sub 2} exhibited the desired p-type conduction. Half- and full-cell tests with Co-doped LiFeO{sub 2} as the cathode material showed that its performance strongly depended on the oxygen partial pressure. Under simulated high-pressure conditions, where the O{sub 2} partial pressure was 70 kPa, the performance was good. LiCoO{sub 2} had low solubility and was a good electronic conductor undoped. In addition, it exhibited p-type conduction, and, when used as a cathode material, gave good cell performance. It precipitated as cobalt metal under reducing conditions in anode. However, neither rate of deposition nor conditions influencing deposition and location are known.

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 10182776
• Report Number(s): ANL/CMT/CP-79775; CONF-930802-11; ON: DE93019515
• Resource Relation: Conference: 206. American Chemical Society (ACS) national meeting,Chicago, IL (United States),22-27 Aug 1993; Other Information: PBD: [1993]
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
36 MATERIALS SCIENCE
MOLTEN CARBONATE FUEL CELLS
CATHODES
LITHIUM COMPOUNDS
FERRATES
MANGANESE OXIDES
LITHIUM OXIDES
COBALT OXIDES
STABILITY
SOLUBILITY
DOPED MATERIALS
COBALT ADDITIONS
NIOBIUM ADDITIONS
ELECTRIC CONDUCTIVITY
TEMPERATURE RANGE 0400-1000 K
ELECTRICAL PROPERTIES
LITHIUM CARBONATES
POTASSIUM CARBONATES
MOLTEN SALTS
300503
360200
MATERIALS, COMPONENTS, AND AUXILIARIES
CERAMICS, CERMETS, AND REFRACTORIES