Thermoelectric Transport in Cu7PSe6with High Copper Ionic Mobility,Journal of the American Chemical Society

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Thermoelectric Transport in Cu7PSe6with High Copper Ionic Mobility
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2014-08-14 , DOI: 10.1021/ja5056092
Kai S. Weldert _{1,

2} , Wolfgang G. Zeier ₃ , Tristan W. Day ₃ , Martin Panthöfer ₁ , G. Jeffrey Snyder ₃ , Wolfgang Tremel ₁

Affiliation

Building on the good thermoelectric performances of binary superionic compounds like Cu2Se, Ag2Se and Cu2S, a better and more detailed understanding of phonon-liquid electron-crystal (PLEC) thermoelectric materials is desirable. In this work we present the thermoelectric transport properties of the compound Cu7PSe6 as the first representative of the class of argyrodite-type ion conducting thermoelectrics. With a huge variety of possible compositions and high ionic conductivity even at room temperature, the argyrodites represent a very good model system to study structure-property relationships for PLEC thermoelectric materials. We particularly highlight the extraordinary low thermal conductivity of Cu7PSe6 below the glass limit, which can be associated with the molten copper sublattice leading to a softening of phonon modes.

中文翻译：

具有高铜离子迁移率的 Cu7PSe6 中的热电传输

基于二元超离子化合物（如 Cu2Se、Ag2Se 和 Cu2S）的良好热电性能，需要更好、更详细地了解声子 - 液体电子 - 晶体（PLEC）热电材料。在这项工作中，我们展示了化合物 Cu7PSe6 的热电传输特性，作为 argyrodite 型离子传导热电类的第一个代表。即使在室温下，由于具有多种可能的成分和高离子电导率，银铜矿代表了一个非常好的模型系统，用于研究 PLEC 热电材料的结构-性能关系。我们特别强调了低于玻璃极限的 Cu7PSe6 极低的热导率，这可能与熔化的铜亚晶格导致声子模式的软化有关。

更新日期：2014-08-14

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