Thin film fuel cell/battery power generating system. Annual report, April 1, 1978-March 31, 1979

Technical Report · Mon Apr 30 00:00:00 EDT 1979

DOI:https://doi.org/10.2172/6210695· OSTI ID:6210695

Work on the modified lanthanum chromite interconnection (IC) proceeded in a number of areas. Toward determining the stability of the IC, oxygen ion transport mechanisms were evaluated, as well as IC stability under low oxygen partial pressures (10/sup -6/t 10/sup -18/ atm). To produce long, continuous, 40 ..mu..m thick IC films on 0.3 m long porous support tubes, improvements were made in both the EVD apparatus and process. Porous support tubes of calcia-stabilized zirconia were produced, up to 0.3 m long, for fuel cell stack fabrication. Work on the air electrode current collector covered several areas. The high-temperature resistivity of doped indium oxide was studied at various doping levels, as a function of oxygen partial pressure. Also, other possible current collector formulations were investigated. By incorporating materials and process improvements, as well as improved porous support tubes, in the fabrication of 20 cell stacks, stack quality and performance at 400 mA/cm/sup 2/ and 1000/sup 0/C have steadily improved. Measurement techniques have been refined on the fuel cell and its components. Realistic combination specimens, as fuel electrode-interconnection layers on a porous support tube, have been used to determine interconnection apparent resistivity at 1000/sup 0/C. From polarization tests on fabricated fuel cell stacks, major electrical resistance contributors to the total cell resistance are the air electrode and the interconnection, with the latter being the largest contributor.

• Research Organization: Westinghouse Electric Corp., Pittsburgh, PA (United States). Research and Development Center
• DOE Contract Number: AC02-76ET11305
• OSTI ID: 6210695
• Report Number(s): DOE/ET/11305-T9
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
HIGH-TEMPERATURE FUEL CELLS
FABRICATION
PERFORMANCE TESTING
CATALYST SUPPORTS
CHROMIUM OXIDES
CONNECTORS
ELECTRIC CONDUCTIVITY
ELECTRODES
INDIUM OXIDES
LANTHANUM OXIDES
MATERIALS
MATERIALS TESTING
RESEARCH PROGRAMS
SERVICE LIFE
SINTERING
SOLID ELECTROLYTES
SPUTTERING
SULFUR
VAPOR PLATING
ZIRCONIUM OXIDES
CHALCOGENIDES
CHROMIUM COMPOUNDS
CONDUCTOR DEVICES
DEPOSITION
DIRECT ENERGY CONVERTERS
ELECTRICAL EQUIPMENT
ELECTRICAL PROPERTIES
ELECTROCHEMICAL CELLS
ELECTROLYTES
ELEMENTS
EQUIPMENT
FUEL CELLS
INDIUM COMPOUNDS
LANTHANUM COMPOUNDS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PLATING
RARE EARTH COMPOUNDS
SURFACE COATING
TESTING
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
300501* - Fuel Cells- Design & Development
300502 - Fuel Cells- Performance & Testing
300503 - Fuel Cells- Materials
Components
& Auxiliaries