An argyrodite-type Ag9GaSe6 liquid-like material with ultralow thermal conductivity and high thermoelectric performance

Binbin Jiang; Pengfei Qiu; Hongyi Chen; Qihao Zhang; Kunpeng Zhao; Dudi Ren; Xun Shi; Lidong Chen

doi:10.1039/C7CC05935C

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An argyrodite-type Ag₉GaSe₆ liquid-like material with ultralow thermal conductivity and high thermoelectric performance†

Binbin Jiang,^ab Pengfei Qiu,

*^a Hongyi Chen,^ab Qihao Zhang,^ab Kunpeng Zhao,^ab Dudi Ren,^a Xun Shi

*^a and Lidong Chen^ac

Author affiliations

* Corresponding authors

^a State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
E-mail: qiupf@mail.sic.ac.cn, xshi@mail.sic.ac.cn

^b University of Chinese Academy of Sciences, Beijing 100049, China

^c Shanghai Institute of Materials Genome, Shanghai, China

Abstract

We report a ternary argyrodite-type Ag₉GaSe₆ compound as a promising thermoelectric material in a moderate temperature range. Due to high carrier mobility and ultralow lattice thermal conductivity, a maximum ZT of 1.1 was obtained with stoichiometric Ag₉GaSe₆ at 800 K. Via introducing slight Se-deficiency to optimize the carrier concentration, the maximum ZT is further enhanced to 1.3.

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Article information

DOI: https://doi.org/10.1039/C7CC05935C
Article type: Communication
Submitted: 30 Jul 2017
Accepted: 02 Oct 2017
First published: 02 Oct 2017

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Chem. Commun., 2017,53, 11658-11661

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An argyrodite-type Ag₉GaSe₆ liquid-like material with ultralow thermal conductivity and high thermoelectric performance

B. Jiang, P. Qiu, H. Chen, Q. Zhang, K. Zhao, D. Ren, X. Shi and L. Chen, Chem. Commun., 2017, 53, 11658 DOI: 10.1039/C7CC05935C

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Chemical Communications