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Effect of lithium doping on electrophysical and diffusion properties of nonstoichiometric superionic copper selenide Cu1.75Se

https://doi.org/10.29317/ejpfm.2017010203

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Abstract

The results of studies of the ionic conductivity and the conjugated chemical diffusion coefficients (CCDC) in the nonstoichiometric LixCu1.75Se(0 ≤ x ≤ 0.25) ternary alloys are presented. It has been observed that the values of the ionic conductivity of Cu1.75Se copper selenide decreases with lithium doping in general owing to increasing the the activation energy. The increasing of the conjugate chemical diffusion coefficients of the cations and electron holes was observed with increasing of lithium content, despite the decreasing of self-diffusion coefficients of the cations and decreasing of electron mobilities. The behavior of the conjugate chemical diffusion coefficients explained by a decrease in the degree of non-stoichiometry of the composition, leading to an increase of the internal electric field accelerating the motion of slower particles.

About the Authors

M. Kh. Balapanov
Bashkir State University
Russian Federation


K. A. Kuterbekov
L.N. Gumilyov Eurasian National University
Kazakhstan


M. M. Kubenova
L.N. Gumilyov Eurasian National University
Kazakhstan


R. Kh. Ishembetov
Bashkir State University
Russian Federation


B. M. Akhmetgaliev
Bashkir State University
Russian Federation


R. A. Yakshibaev
Bashkir State University
Russian Federation


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Review

For citations:


Balapanov M.K., Kuterbekov K.A., Kubenova M.M., Ishembetov R.K., Akhmetgaliev B.M., Yakshibaev R.A. Effect of lithium doping on electrophysical and diffusion properties of nonstoichiometric superionic copper selenide Cu1.75Se. Eurasian Journal of Physics and Functional Materials. 2017;1(2):40-49. https://doi.org/10.29317/ejpfm.2017010203

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ISSN 2522-9869 (Print)
ISSN 2616-8537 (Online)