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Electrochemical energy sources are part of the new energy sector due to their high efficiency and cost effectiveness. Solid oxide fuel cells are an excellent example of these devices. They are made from a variety of materials, including ceramics. Oxygen ion conductive ceramics can be used as the electrolyte material. In this work, the isovalent doping of the barium sublattice by calcium ions has been carried out for the first time. The effect of doping on the structure and electrical conductivity was investigated. Doping leads to an increase in conductivity values compared to the matrix composition. The greatest increase in conductivity was observed for the composition with low dopant concentration.
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Tarasova et al. (2025) studied this question.
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