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- Title
Study of the Electrophysical Properties of Solid Solutions with a Perovskite Structure in La<sub>2</sub>O<sub>3</sub>–SrO–Ni(Co,Fe)<sub>2</sub>O<sub>3–δ</sub> Systems for Cathode Electrodes for Fuel Cells.
- Authors
Kalinina, M. V.; Dyuskina, D. A.; Polyakova, I. G.; Arsent'ev, M. Yu.; Shilova, O. A.
- Abstract
Finely dispersed mesoporous powders of the following composition are synthesized by the method of cocrystallization of nitrate salts with ultrasonic treatment: La1–xSrxNiO3–δ, La1–xSrxCoO3–δ, and La1–xSrxFe0.7Ni0.3O3–δ (x = 0.30; 0.40). Based on them, ceramic nanomaterials of the given composition with a coherent scattering region (CSR) of ~65–69 nm (1300°С) are obtained. Ceramics fired at 1300°C are single-phase and have a tetragonal and orthorhombic perovskite-type structure in the La2O3‒SrO‒Ni(Co,Fe)2O3–δ system. Solid solutions have mixed electron–ion conductivity with transfer numbers te = 0.98–0.90 and ti = 0.02–0.10. Ceramics with a tetragonal perovskite-type crystal structure exhibit higher electrical conductivity than materials having an orthorhombic perovskite-type crystal structure. According to their electrophysical properties related to the structural features of solid solutions, ceramic materials obtained based on them are promising as solid oxide cathodes for average-temperature fuel cells.
- Subjects
FUEL cell electrodes; SOLID oxide fuel cells; SOLID solutions; ELECTRIC conductivity; CATHODES; CERAMIC materials; FUEL cells
- Publication
Glass Physics & Chemistry, 2023, Vol 49, Issue 2, p177
- ISSN
1087-6596
- Publication type
Article
- DOI
10.1134/S1087659622601046