Electronically conducting ceramics for high temperature oxidizing environments

Patent · Tue Jan 14 04:00:00 EST 1986

OSTI ID:6091389

Kucera, G H; Smith, J L; Sim, J W

This patent describes the composition of an oxidant electrode in the environment of a fuel cell consisting of a fuel electrode, the oxidant electrode, and an electrolyte containing an alkali metal carbonate mixture including lithium carbonate. The oxidant electrode consisting of the electronically-conductive lithium and the transition metal oxide selected from Li/sub 2/MnO/sub 3/ with magnesium dopant and LiFeO/sub 2/ with manganese dopant. The oxide has electrical conductivity as measured by a resistivity below about 100 ohm-cm., high temperature stability in the presence of molten alkali metal carbonate including lithium carbonate at a temperature in the order of 500-700/sup 0/C., and a crystalline structure incorporating the lithium and transition metals as well as the dopant.

• Assignee: Dept. of Energy, Washington, DC
• Patent Number(s): US 4564567
• OSTI ID: 6091389
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
300503* -- Fuel Cells-- Materials
Components
& Auxiliaries
36 MATERIALS SCIENCE
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALI METAL COMPOUNDS
CARBON COMPOUNDS
CARBONATES
CERAMICS
CHALCOGENIDES
CHEMICAL COMPOSITION
CRYSTAL DOPING
CRYSTAL STRUCTURE
DIRECT ENERGY CONVERTERS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROCHEMICAL CELLS
ELECTRODES
ELECTROLYTES
FUEL CELLS
HIGH TEMPERATURE
IRON COMPOUNDS
IRON OXIDES
LITHIUM CARBONATES
LITHIUM COMPOUNDS
LITHIUM OXIDES
MANGANESE COMPOUNDS
MANGANESE OXIDES
MATERIALS
OXIDES
OXIDIZERS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
STABILITY
TRANSITION ELEMENT COMPOUNDS