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| Description: Researchers from the University of Guelph have developed a novel method of preparing thin films of mixed ionic electronic conductor (MIEC) composites. Two ultrasonic spray channels operating simultaneously are used to synthesize films of granular structure consisting of two different and separate chemical compositions. The grains of each type of material are randomly distributed in nanometer scale throughout the matrix while maintaining heterogeneous structure. Fabrication of a MIEC composed of two metal oxides exhibiting high conductivity at intermediate temperatures (550oC–700oC) is made possible by this method. The new material is well suited for solid oxide fuel cell cathode application. The method of this invention is a low cost wet chemical synthesis of advanced thin films; the method can be easily scaled up and can be used to fabricate graded structures. Advantages: * Low cost, low energy, robust and reproducible process to fabricate thin film material of pre-determined stoichiometric mixture of ions * Lower deposition and anneal temperatures in comparison to traditional ceramic methods * Inorganic precursor solutions resulting in excellent conversion with no carbon residue * Potential to obtain porous and dense films with controlled interfacial gradient and/or patterned structures Potential markets include: * Solid oxide fuel cell (SOFC) applications * Microfuel cells * Electrochemical devices with controlled interfacial properties State of Development: Developmental; academic/industry partners are being sought | ||
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