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in subjects: "Transition Element Compounds 300503* -- Fuel Cells-- Materials, Components, & Auxiliaries"  
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Development of improved cathodes for solid oxide fuel cells

Description: The University of Missouri-Rolla conducted a 17 month research program focused on the development and evaluation of improved cathode materials for solid oxide fuel cells (SOFC). The objectives of this program were: (1) the development of cathode materials of improved stability in reducing environments; and (2) the development of cathode materials with improved electrical conductivity. The program was successful in identifying some potential candidate materials: Air sinterable (La,Ca)(Cr,Co)O{su… more
Date: March 1, 1991
Creator: Anderson, H.U.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of materials for open-cycle MHD. Quarterly report for the period ending June 1983

Description: Pacific Northwest Laboratory (PNL) is conducting an ongoing study of channel components for open-cycle, coal-fired magnetohydrodynamic (MHD) generators. Specifically, electrodes and insulators are being developed. The electrical conductivity has been measured on several compositions based on hafnium oxide, rare earth oxides, and indium oxide and on In/sub 2/O/sub 3/-SnO/sub 2/ compositions. Indium oxide at present appears to be the main constituent required for high conductivity. In the indium … more
Date: November 1, 1983
Creator: Marchant, D.D. & Bates, J.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Advanced-fuel-cell development. Progress report, October-December 1980

Description: This report describes the fuel cell research and development activities at Argonne National Laboratory (ANL) during the period October through December 1980. These efforts have been directed toward (1) developing alternative concepts for components of molten carbonate fuel cells, and (2) improving understanding of component behavior. The principal focus has been on development of ..gamma..-LiAlO/sub 2/ sinters as electrolyte structures. Green bodies were prepared by tape casting and then sinter… more
Date: June 1, 1982
Creator: Pierce, R D; Arons, R M; Dusek, J T; Fraioli, A V; Kucera, G H; Sim, J W et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Cathode-preparation method for molten-carbonate fuel cell

Description: A method of preparing a porous cathode structure for use in a molten carbonate fuel cell begins by providing a porous integral plaque of sintered nickel oxide particles. The nickel oxide plaque can be obtained by oxidizing a sintered plaque of nickel metal or by compacting and sintering finely divided nickel oxide particles to the desired pore structure. The porous sintered nickel oxide plaque is contacted with a lithium salt for a sufficient time to lithiate the nickel oxide structure and thus… more
Date: January 28, 1982
Creator: Smith, James L.; Sim, James W. & Kucera, Eugenia H.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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Simulated coal-gas-fueled molten carbonate fuel cell development program

Description: In previous work, International Fuel Cells Corporation (EFC) found interactions between molten carbonate fuel cell cathode materials being considered as replacements for the presently used nickel oxide and matrix materials. Consequently, this work was conducted to screen additional new materials for mutual compatibility. As part of this program, experiments were performed to examine the compatibility of several candidate, alternative cathode materials with the standard lithium aluminate matrix … more
Date: July 1, 1992
Creator: Johnson, W.H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Advanced materials development for fossil energy conversion applications

Description: Research activities being conducted as part of this project include: (1) fundamental studies of electrochemical processes occurring at surfaces and interfaces in fuel cells, and (2) development of novel materials synthesis and processing methodologies for fossil energy conversion applications. Complex impedance and dc polarization studies of the electrocatalytic activity at the cathode have allowed intrinsic materials properties to be separated from extrinsic properties related to morphology. M… more
Date: May 1, 1992
Creator: Bates, J. L.; Chick, L. A.; Kingsley, J. J.; Pederson, L. R.; Weber, W. J.; Youngblood, G. E. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Advanced materials for solid oxide fuel cells: Hafnium-Praseodymium-Indium Oxide System

Description: The HfO/sub 2/-PrO/sub 1.83/-In/sub 2/O/sub 3/ system has been studied at the Pacific Northwest Laboratory to develop alternative, highly electrically conducting oxides as electrode and interconnection materials for solid oxide fuel cells. A coprecipitation process was developed for synthesizing single-phase, mixed oxide powders necessary to fabricate powders and dense oxides. A ternary phase diagram was developed, and the phases and structures were related to electrical transport properties. T… more
Date: June 1, 1988
Creator: Bates, J. L.; Griffin, C. W. & Weber, W. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Cathode dissolution: Quarterly report, January-March 1987

Description: One important mode of degradation of current MCFCs is the dissolution of the NiO cathode into the electrolyte tile and the subsequent precipitation of Ni in the tile. Over time the performance of the cell degrades, and evantually the cell may short out locally via a bridge of Ni particles between the cathode and anode. The purpose of this program is to further the understanding of the processes which cause degradation of the NiO cathode in MCFCs, especially those processes involving dissolution… more
Date: July 1, 1987
Creator: Shores, D.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Advanced materials and electrochemical processes in high-temperature solid electrolytes

Description: Fuel cells for the direct conversion of fossil fuels to electric energy necessitates the use of high-temperature solid electrodes. This study has included: (1) determination of electrical transport, thermal and electrical properties to illucidate the effects of microstructure, phase equilibria, oxygen partial pressure, additives, synthesis and fabrication on these properties; (2) investigation of synthesis and fabrication of advanced oxide materials, such as La{sub 0.9}Sn{sub 0.1}MnO{sub 3}; an… more
Date: October 1, 1990
Creator: Bates, J. L.; Chick, L. A.; Youngblood, G. E. & Weber, W. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Alternative materials for solid oxide fuel cells: Factors affecting air-sintering of chromite interconnections

Description: The purpose of this research is to develop alternative materials for solid oxide fuel cell (SOFC) interconnections and electrodes with improved electrical, thermal and electrochemical properties. Another objective is to develop synthesis and fabrication processes for these materials whereby they can be consolidated in air into SOFCs. The approach is to (1) develop modifications of the current, state-of-the-art materials used in SOFCs, (2) minimize the number of cations used in the SOFC material… more
Date: July 1, 1992
Creator: Chick, L. A. & Bates, J. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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SOFC chromite sintering and electrolyte/air-electrode interface reactions

Description: Air sintering of chromites was investigated in La(Sr)CrO[sub 3], La(Ca)CrO[sub 3], and Y(Ca)CrO[sub 3]. Effects of alkaline earth dopant level and chromium enrichment/depletion on chromite sintered densities and microstructures are discussed. Ac impedance spectroscopy and dc polarization coupled with an unbonded interface cell were used to examine SOFC (solid oxide fuel cells) electrochemical reactions at solid-solid-gas interfaces, particularly for La[sub 1-x]Sr[sub x]MnO[sub 3]. 5 refs.
Date: April 1, 1992
Creator: Bates, J. L.; Chick, L. A. & Youngblood, G. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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