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Synthesis of cathode materials for solid oxide fuel cells with eggshell membrane as template

Dong, D., Li, D., Wu, Y., Li, C-Z and Wang, H. (2010) Synthesis of cathode materials for solid oxide fuel cells with eggshell membrane as template. In: Chemeca 2010: Engineering at the Edge, 26 - 29 September, Adelaide, Australia



Solid oxide fuel cells (SOFCs) are promising power generation devices because of their high energy conversion efficiency, and the cell performances greatly depend on the starting materials used in the fabrication of SOFCs. Perovskite ceramics are extensively used in solid ocide fuel cells. However, perovskite ceramics need a higher crystallization temperature than single metal oxides and bimetal oxides, and their properties depend on ceramics crystalline and morphology. At present, perovskite materials are mainly synthesized by either solid state reaction or wet-chemical synthesis (e.g. gel combustion), but both methods produce aggregated particles after high temperature crystallization. Template synthesis is an effective way to control ceramic morphology, and bio-templates such as butterfly wing and eggshell membrane (ESM) are particularly attractive for synthesizing metal oxide ceramics because of the strong metal-protein bonding. ESM is a cheap and easily available biomaterial with an interwoven fibrous structure. Unlike the ceramics synthesized by other templates, the ESM-templated ceramics could tolerate high temperatures owing to the interwoven fibrous structure.

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