| Autor: |
Glukhov, A. A., Reznitskikh, O. G., Yaroslavtseva, T. V., Urusova, N. V., Ukshe, A. E., Dobrovolsky, Yu. A., Bushkova, O. V. |
| Předmět: |
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| Zdroj: |
Russian Journal of Electrochemistry; Feb2024, Vol. 60 Issue 2, p135-140, 6p |
| Abstrakt: |
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–1 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. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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