Transport phenomena in superionic Na N... Cu2-N... S (N...=0.05; 0.1; 0.15; 0.2) compounds

被引：10

作者：

Balapanov, M. Kh. ^{[1
]}

Ishembetov, R. Kh. ^{[1
]}

Kuterbekov, K. A. ^{[2
]}

Kubenova, M. M. ^{[2
]}

Almukhametov, R. F. ^{[1
]}

Yakshibaev, R. A. ^{[1
]}

机构：

[1] Bashkir State Univ, Ufa, Russia

[2] LN Gumilyov Eurasian Natl Univ, Astana, Kazakhstan

来源：

IONICS | 2018年 / 24卷 / 05期

关键词：

Copper sulfide; Ionic conductivity; Thermoelectric properties; THERMOELECTRIC PROPERTIES; CHEMICAL DIFFUSION; IONIC-CONDUCTIVITY; ELECTRONIC-STRUCTURE; COPPER SULFIDES; SILVER SULFIDE; X-RAY; CU1.8S; CU2S; TRANSFORMATION;

D O I：

10.1007/s11581-017-2299-z

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The electronic and ionic conductivity, the electronic and ionic Seebeck coefficients, and the thermal conductivity of Na (x) Cu2 - x S (x = 0.05, 0.1, 0.15, 0.2) compounds were measured in the temperature range of 20-450 A degrees D. The total cationic conductivity of Na0.2Cu1.8S is about 2 S/cm at 400 A degrees D (the activation energy ae 0.21 eV). Over the studied compounds, the composition Na0.2Cu1.8S has the highest electronic conductivity (500-800 S/cm) in the temperature range from 20 to 300 A degrees D, and the highest electronic Seebeck coefficient (about 0.2 mV/K) in the same temperature range is observed for Na0.15Cu1.85S composition; the electronic Seebeck coefficient increases abruptly above 300 A degrees D for all compounds. The thermal conductivity of superionic Na0.2Cu1.8S is low, which causes high values of the dimensionless thermoelectric figure of merit ZT from 0.4 to 1 at temperatures from 150 to 340 A degrees C.

引用

页码：1349 / 1356

页数：8

共 50 条

[1]

Balapanov M.K., 2005, B RUSS ACAD SCI PHYS, V69, P623

[2] Ionic conduction and chemical diffusion in solid solutions of superionic conductors Cu2X-Me2X (Me = Ag, Li; X = S, Se) [J].