A new type of novel salt-inclusion chalcogenide with ultralow thermal conductivity

被引：12
|
作者：
Chen, Hong [1 ,2 ]
Liu, Peng-Fei [3 ]
Lin, Hua [1 ,2 ]
Wu, Xin-Tao [1 ,2 ]
机构：
[1] Chinese Acad Sci, Fujian Inst Res Struct Matter, State Key Lab Struct Chem, Fuzhou 350002, Peoples R China
[2] Fujian Sci & Technol Innovat Lab Optoelect Inform, Fuzhou 350002, Peoples R China
[3] Chinese Acad Sci, Inst High Energy Phys, Spallat Neutron Source Sci Ctr, Dongguan 523803, Peoples R China
来源：
CHEMICAL COMMUNICATIONS | 2020年 / 56卷 / 96期
基金：
中国国家自然科学基金;
关键词：
HIGH THERMOELECTRIC FIGURE; CLOSED CAVITIES; RB; RE; PERFORMANCE; MERIT; CS; CHALCOHALIDES; TELLURIDES; SELENIDES;
D O I：
10.1039/d0cc06306a
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The design and development of novel chalcogenides with ultralow thermal conductivity is extremely important but very challenging for promoting the efficiencies of thermoelectric (TE) materials. Herein, a new type of salt-inclusion chalcogenide (SIC), [Rb6Cl][RE23Mn7Se44] (RE = Ho-Yb), was discovered via a modified flux method. They possessed [RESe6] and [MSe6] (M = RE/Mn) octahedra as basic building units, which interlinked to form a three-dimensional quasi-NaCl-type [RE23Mn7Se44](5-) host framework, where the [Rb6Cl](5+) guest ions resided. Interestingly, these isomorphic compounds showed ultralow thermal conductivities (0.28-0.37 W m(-1) K-1) at 673 K, which are reported for the first time in SICs. This work not only enriches SIC chemistry but also broadens the application of SICs in the TE field.
引用
收藏
页码：15149 / 15152
页数：4
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