Yttria-stabilized zirconia solid oxide electrolyte fuel cells--- monolithic solid oxide fuel cells
The monolithic solid oxide fuel cell (MSOFC) is currently under development for a variety of applications including coal-based power generation. The MSOFC is a design concept that places the thin components of a solid oxide fuel cell in lightweight, compact, corrugated structure, and so achieves high efficiency and excellent performance simultaneously with high power density. The MSOFC can be integrated with coal gasification plants and is expected to have high overall efficiency in the conversion of the chemical energy of coal to electrical energy. This report describes work aimed at (1) assessing manufacturing costs for the MSOFC and system costs for a coal-based plant; (2) modifying electrodes and electrode/electrolyte interfaces to improve the electrochemical performance of the MSOFC; and (3) testing the performance of the MSOFC on hydrogen and simulated coal gas. Manufacturing costs for both the coflow and crossflow MSOFC's were assessed based on the fabrication flow charts developed by direct scaleup of tape calendering and other laboratory processes. Integrated coal-based MSOFC systems were investigated to determine capital costs and costs of electricity. Design criteria were established for a coal-fueled 200-Mw power plant. Four plant arrangements were evaluated, and plant performance was analyzed. Interfacial modification involved modification of electrodes and electrode/electrolyte interfaces to improve the MSOFC electrochemical performance. Work in the cathode and cathode/electrolyte interface was concentrated on modification of electrode porosity, electrode morphology, electrode material, and interfacial bonding. Modifications of the anode and anode/electrolyte interface included the use of additives and improvement of nickel distribution. Single cells have been tested for their electrochemical performance. Performance data were typically obtained with humidified H{sub 2} or simulated coal gas and air or oxygen. 68 figs., 29 tabs.
- Research Organization:
- AiResearch Mfg. Co., Torrance, CA (United States). Engineering Div.
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC21-88MC25166
- OSTI ID:
- 5521909
- Report Number(s):
- DOE/MC/25166-2961; ON: DE91002010
- Country of Publication:
- United States
- Language:
- English
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20 FOSSIL-FUELED POWER PLANTS
FOSSIL-FUEL POWER PLANTS
PERFORMANCE
MANUFACTURING
COST
SOLID ELECTROLYTE FUEL CELLS
COAL GAS
COAL GASIFICATION
DESIGN
ELECTRODES
FABRICATION
INTERFACES
MICROSTRUCTURE
PROGRESS REPORT
YTTRIUM OXIDES
ZIRCONIUM OXIDES
CHALCOGENIDES
CRYSTAL STRUCTURE
DIRECT ENERGY CONVERTERS
DOCUMENT TYPES
ELECTROCHEMICAL CELLS
FLUIDS
FUEL CELLS
GASES
GASIFICATION
OXIDES
OXYGEN COMPOUNDS
POWER PLANTS
THERMAL POWER PLANTS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
ZIRCONIUM COMPOUNDS
300504* - Fuel Cells- Applications
300502 - Fuel Cells- Performance & Testing
300505 - Fuel Cells- Electrochemistry
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200102 - Fossil-Fueled Power Plants- Power Cycles