Influence of the cation sublattice defectness on the electronic thermoelectric power of Li x Cu(2−x)−δ (x ≤ 0.25)

Балапанов, М. Х.; Ишембетов, Р. Х.; Кутербеков, К. А.; Nurakhmetov, Т.N.; Уразаева, Э. К.; Yakshibaev, R. A.

doi:10.1134/s0020168514080044

Cited by 6 publications

(2 citation statements)

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“…The authors of [24][25][26][27][28][29] experimentally investigated the crystal structure and transport properties of Li x Cu 2−x S solid solutions, which exhibit superionic conductivity. X-ray diffraction studies [25] revealed that Li x Cu 2−x S (х≤ 0.25) compounds are solid solutions on the base of α-Cu 2 S at temperature higher than certain temperature, which depends on the chemical composition of the phase.…”

Section: Solid Solutions On Base Of Copper Sulfidementioning

confidence: 99%

“…Studying copper sulfides and copper selenides substituted with lithium, it was found that the ionic conductivity and diffusion rate of copper in materials decrease by almost an order of magnitude compared to the initial binary compositions, and the thermoelectric coefficient remains high and even increases [22][23][24][25][26][27][28][29]. This significantly improves the prospects of copper chalcogenides for practical use.…”

Section: Introductionmentioning

confidence: 99%

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Some Thermoelectric Phenomena in Copper Chalcogenides Replaced by Lithium and Sodium Alkaline Metals

et al. 2021

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This review presents thermoelectric phenomena in copper chalcogenides substituted with sodium and lithium alkali metals. The results for other modern thermoelectric materials are presented for comparison. The results of the study of the crystal structure and phase transitions in the ternary systems Na-Cu-S and Li-Cu-S are presented. The main synthesis methods of nanocrystalline copper chalcogenides and its alloys are presented, as well as electrical, thermodynamic, thermal, and thermoelectric properties and practical application. The features of mixed electron–ionic conductors are discussed. In particular, in semiconductor superionic copper chalcogenides, the presence of a “liquid-like phase” inside a “solid” lattice interferes with the normal propagation of phonons; therefore, superionic copper chalcogenides have low lattice thermal conductivity, and this is a favorable factor for the formation of high thermoelectric efficiency in them.

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