Chemical diffusion and ionic conductivity in nonstoichiometric nanocrystalline superionic NaxCu1.75S (x = 0.1, 0.15, 0.2, 0.25) materials


Kuterbekov K.A. Balapanov M.K. Kubenova M.M. Ishembetov R.K. Zeleev M.K. Yakshibaev R.A. Kabyshev A.M. Alina R.A. Bekmyrza K.Z. Baikhozhaeva B.U. Abseitov E.T. Taimuratova L.U.
September 2022Springer Science and Business Media Deutschland GmbH

Ionics
2022#28Issue 94311 - 4319 pp.

The paper presents the experimental results on ionic conductivity and chemical diffusion in nonstoichiometric nanocrystalline superionic materials NaxCu1.75S (x = 0.1, 0.15, 0.2, 25). High values of the coefficient of conjugated chemical diffusion of cations and electronic holes (1.1∙10−3 and 1.65∙10−3 cm2/s at 410 °C) were observed in the studied electron-ionic conductors Na0.10Cu1.75S and Na0.20Cu1.75S. Activation energies of the total ionic conductivity are measured as 0.30 and 0.40 eV for superionic Na0.10Cu1.75S and Na0.15Cu1.75S phases respectively. In the superionic phases, the measured values of the total ionic conductivity are 2.8, 1.5, and 2.0 S/cm for Na0.10Cu1.75S, Na0.15Cu1.75S, and Na0.20Cu1.75S at 410 °C respectively. Thus, insertion of sodium to copper sulfide did not lead to worse of high ionic conductivity in the superionic phase.

Chemical diffusion , Copper chalcogenides , Ionic conductivity , Superionic materials , Synthesis

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L.N.Gumilyov Eurasian National University, 2 Satpayev Str., Nur-Sultan, Kazakhstan
Bashkir State University, 32 Zaki Validi Str., Ufa, Russian Federation
Bashkir State Medical University, 3 Lenina Str., Ufa, Russian Federation
Caspian University of Technology and Engineering Named After Sh. Yessenov, Microdistrict 32, Aktau, Kazakhstan

L.N.Gumilyov Eurasian National University
Bashkir State University
Bashkir State Medical University
Caspian University of Technology and Engineering Named After Sh. Yessenov

10 лет помогаем публиковать статьи Международный издатель

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