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Mitigation of the deleterious effect of silicon species on the conductivity of ceria electrolytes
Institution:1. Energy and Nuclear Research Institute — IPEN, PO Box 11049, Pinheiros, 05422-970 S. Paulo, SP, Brazil;2. LEPMI, Laboratoire d''Electrochimie et de Physico-Chimie des Matériaux et des Interfaces, UMR 5279, CNRS, Grenoble INP, Université de Savoie, Université Joseph Fourier, BP75, 38402 Saint Martin d''Hères, France;1. Department of Physics, Chemistry and Biology (IFM), Linköping University, SE-581 83, Linköping, Sweden;2. Materials Science and Engineering Department, KTH-Royal Institute of Technology, Brinellvägen 13, 100 44 Stockholm, Sweden;3. Department of Physics and Astronomy, Uppsala University, Box 516, 751 20 Uppsala, Sweden;1. School for the Engineering of Matter, Transport and Energy, Arizona State University, Tempe, AZ 85287, USA;2. Center for Nanoscale Science and Technology, National Institute of Standards and Technology, Gaithersburg, MD 20899-6203, USA
Abstract:The deleterious effect of silicon species on the conductivity of ceria electrolytes is well documented in the literature. A simple process has been developed at Praxair that alleviates the negative effect of high concentrations of silicon species on the conductivity of ceria electrolytes. The impact of this process on the conductivity of commercially available doped ceria electrolyte powders is demonstrated and a likely mechanism for the reduction of the resistivity is proposed. The influence of this process on other properties of the ceria electrolyte is discussed.
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