Design and Development of New Glass-Ceramic Proton Conducting Membranes

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2002-05-01
Authors
Poling, Steven
Sutherland, Jacob
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Martin, Steve
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Materials Science and Engineering

The Department of Materials Science and Engineering teaches the composition, microstructure, and processing of materials as well as their properties, uses, and performance. These fields of research utilize technologies in metals, ceramics, polymers, composites, and electronic materials.

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The Department of Materials Science and Engineering was formed in 1975 from the merger of the Department of Ceramics Engineering and the Department of Metallurgical Engineering.

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1975-present

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Abstract

A new class of proton conducting membranes for hydrogen fuel cell applications are being developed using thio-acids. These membranes are being designed to yield high proton conductivities (10-6 to 10-3 S/cm), to be anhydrous, thermally stable, chemically stable to H2O and O2 in a typical fuel cell setup, and have minimal fuel cross-over capability. New thio-acids are being synthesized to fulfill these goals. Thus far, conductivity values of 10-5 S/cm are achievable at ∼500o C, along with excellent thermal and chemical stability in contact with H2O and O2. Conductivities of 10-5 S/cm are also achievable from thio-acids intercalated with H2S at room temperature; however, these compounds decompose above room temperature to form the crystalline thio-acid counterparts.

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