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Electrochemical Properties of Superionic Conductors CsAg4Br3–хI2+хстатья
- Авторы: Glukhov A.A., Reznitskikh O.G., Yaroslavtseva T.V., Urusova N.V., Ukshe A.E., Dobrovolsky Yu A., Bushkova O.V.
- Журнал: Russian Journal of Electrochemistry
- Том: 60
- Номер: 2
- Год издания: 2024
- Издательство: Maik Nauka/Interperiodica Publishing
- Местоположение издательства: Russian Federation
- Первая страница: 135
- Последняя страница: 140
- DOI: 10.1134/s1023193524020058
- Аннотация: Solid solutions CsAg4Br3–хI2+х (x = 0.38; 0.50; 0.68) are prepared by solid-state synthesis; the single phase of the products is confirmed using the methods of X-ray diffraction and differential scanning calorimetry. The studies of electrotransport characteristics of CsAg4Br3–хI2+х involve measuring the ionic conductivity by the four-probe method in the temperature interval from –50 to +120°C and estimating its electronic component by the Hebb–Wagner method. It is shown that in the studied interval of compositions, the ionic conductivity of CsAg4Br3–хI2+х solid solutions is practically independent of x, approaching the conductivity of the well-known superionic conductor RbAg4I5. The activation energy of conduction is found to be about 10 kJ/mol for all compounds studied. The oxidation potential determined by the method of stepwise polarization for CsAg4Br3–хI2+х solid solutions is considerably higher as compared with RbAg4I5, being in the range of 0.75–0.78 V (vs. Ag0/Ag+). The high electrochemical characteristics of CsAg4Br3–хI2+х (0.38 ≤ x ≤ 0.63) and the absence of polymorphic transitions in the considered interval from –160°С to the melting point (175–178°С) make these materials promising for the use in electrochemical devices, especially in low-temperature applications.
- Добавил в систему: Глухов Александр Александрович