Intermediate Temperature Oxygen-Conducting Solid Electrolytes and Mixed Conductors. Annual Report No. 2 (September 1, 1988-August 31, 1989)

摘要

The report describes results from three different areas of emphasis during the second year of the program. The first part of the report deals with the results of work on the partial oxidation of methane to produce useful chemicals using a solid state electrochemical reactor. The second part describes efforts toward the development, synthesis and characterization of intermediate temperature oxygen-conducting solid electrolytes that might be employed in a novel monolithic solid state electrochemical configuration. Such configurations might be interesting for fuel cell, electrochemical oxygen separation and solid electrolyte enhanced catalysis applications. This work comprised the largest portion of the total effort expended during this year. The last part of the report deals with the design and development of an experimental arrangement and a solid state ionic technique to characterize oxygen ionic transport in mixed conducting perovskite-based oxides under concentration gradients. These perovskites are very interesting and important because they may be used as electrode materials in high temperature fuel cells or as non-porous solid membranes for chemically driven oxygen separation applications.