Novel composite electrolytes for solid oxide fuel cell applications
Ball, R. J. and Stevens, R., 2002. Novel composite electrolytes for solid oxide fuel cell applications. In: 26th Annual Conference on Composites, Advanced Ceramics Materials ans Structures, 2002-01-01, Cocoa Beach, FL.
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Gadolinia doped ceria is a good candidate for use as an alternative to zirconia for solid oxide fuel cell electrolytes. This is due to its higher ionic conductivity at reduced temperatures. However, doped ceria has a number of disadvantages such as reduced strength and electronic conductivity. An investigation has been carried out to characterise novel composite structures consisting of tetragonal zirconia particles in a doped ceria matrix. Results indicate that an increase in strength can be produced in the ceria by addition of zirconia particles, however, this is dependent on particle size and heat treatment. A structural analysis of the composite structures was carried out using scanning electron microscopy. Electrical properties were determined using a Solartron dielectric test system.
|Item Type||Conference or Workshop Items (Paper)|
|Creators||Ball, R. J.and Stevens, R.|
|Uncontrolled Keywords||scanning electron microscopy, heat treatment, zirconia, solid electrolytes, solid oxide fuel cells, electric properties, cerium compounds, ionic conduction in solids, particle size analysis, fracture toughness|
|Departments||Faculty of Engineering & Design > Mechanical Engineering|
Faculty of Engineering & Design > Architecture & Civil Engineering
|Additional Information||Ceramic Engineering and Science Proceedings, vol. 23.|
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