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RAS Chemistry & Material ScienceЭлектрохимия Russian Journal of Electrochemistry

  • ISSN (Print) 0424-8570
  • ISSN (Online) 3034-6185

Electrochemical properties of superionic conductors CsAg4Br3-хI2+х

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PII
10.31857/S0424857024020046-1
DOI
10.31857/S0424857024020046
Publication type
Article
Status
Published
Authors
T. V. Yaroslavtseva
  • Affiliation: Institute of Solid State Chemistry, Ural Branch of the Russian Academy of Sciences
A. A. Glukhov
  • Affiliation: Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry of the Russian Academy of Sciences
Volume/ Edition
Volume 60 / Issue number 2
Pages
146-153
Abstract
CsAg4Br3–хI2+х solid solutions with x=0.38; 0.50; 0.63 were prepared by solid-phase synthesis; the single-phase of the products was confirmed by X-ray diffraction and differential scanning calorimetry. Studies of the electrical transport characteristics of CsAg4Br3–хI2+х included measurements of the ionic conductivity by the four-probe method in the range of –50…+120°C and an evaluation of the electronic component of the conductivity by the Hebb-Wagner method. It was shown that the ionic conductivity of CsAg4Br3–хI2+х solid solutions in the studied range of compositions is practically independent of x and is very close to that of the well-known superionic conductor RbAg4I5. The activation energy of conduction for all studied compounds is about 10 kJ mol–1. The oxidation potential determined by the stepwise polarization technique for CsAg4Br3–хI2+х solid solutions is noticeably higher than that of RbAg4I5, and is 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 studied range from –160°C to the melting point (175 – 178°С) make these materials promising for use in electrochemical devices based on solid electrolytes, especially for low temperature applications.
Keywords
пентагалогенид тетра-серебра-цезия синтез рентгеновская дифракция дифференциальная сканирующая калориметрия ионная проводимость электронная проводимость электрохимическая устойчивость
Date of publication
15.02.2024
Year of publication
2024
Number of purchasers
0
Views
32

References

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