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Title: Electronegative Guests in CoSb3

Journal Article · · Energy & Environmental Science
DOI:https://doi.org/10.1039/C6EE00322B· OSTI ID:1261362
 [1];  [1];  [2];  [3];  [1];  [1];  [1];  [1];  [4];  [5];  [6];  [3];  [7];  [7];  [7];  [8];  [8];  [8];  [1]
  1. Univ. of Washington, Seattle, WA (United States)
  2. General Motors (GM), Warren, MI (United States). Global Research and Development
  3. Univ. of Pittsburgh, PA (United States)
  4. Chinese Academy of Sciences (CAS), Shanghai (China). Shanghai Inst. of Ceramics
  5. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  6. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  7. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  8. Wuhan Univ. (China)

Introducing guests into a host framework to form a so called inclusion compound can be used to design materials with new and fascinating functionalities. The vast majority of inclusion compounds have electropositive guests with neutral or negatively charged frameworks. Here, we show a series of electronegative guest filled skutterudites with inverse polarity. The strong covalent guest-host interactions observed for the electronegative group VIA guests, i.e., S and Se, feature a unique localized cluster vibration which significantly influences the lattice dynamics, together with the point-defect scattering caused by element substitutions, resulting in very low lattice thermal conductivity values. The findings of electronegative guests provide a new perspective for guest-filling in skutterudites, and the covalent filler/lattice interactions lead to an unusual lattice dynamics phenomenon which can be used for designing high-efficiency thermoelectric materials and novel functional inclusion compounds with open structures.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1261362
Journal Information:
Energy & Environmental Science, Vol. 9, Issue 6; ISSN 1754-5692
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 79 works
Citation information provided by
Web of Science

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Cited By (16)

Compromise and Synergy in High-Efficiency Thermoelectric Materials journal March 2017
Design of Highly Efficient Thermoelectric Materials: Tailoring Reciprocal-Space Properties by Real-Space Modification journal September 2018
Thermoelectric GeTe with Diverse Degrees of Freedom Having Secured Superhigh Performance journal February 2019
Intrinsically High Thermoelectric Performance in AgInSe 2 n-Type Diamond-Like Compounds journal December 2017
Multiscale Defects as Strong Phonon Scatters to Enhance Thermoelectric Performance in Mg 2 Sn 1– x Sb x Solid Solutions journal July 2019
Improved electrical transport properties and optimized thermoelectric figure of merit in lithium-doped copper sulfides journal March 2018
Determining ideal strength and failure mechanism of thermoelectric CuInTe 2 through quantum mechanics journal January 2018
Study of thermal stability of p-type skutterudites DD 0.7 Fe 3 CoSb 12 by Knudsen effusion mass spectrometry journal January 2019
Thermal, electronic and thermoelectric properties of TiNiSn and TiCoSb based quaternary half Heusler alloys obtained from ab initio calculations journal January 2020
Thermoelectric properties of electronegatively filled S y Co 4−x Ni x Sb 12 skutterudites journal January 2019
New insights into the role of dislocation engineering in N-type filled skutterudite CoSb 3 journal January 2019
Thermoelectric transport properties of Ni-, Pd-, and Pt- doped skutterudites with S-filling as charge compensation journal April 2019
High performance p-type half-Heusler thermoelectric materials journal February 2018
Thermoelectric properties of Co 4 Sb 12 with Bi 2 Te 3 nanoinclusions journal February 2018
Thermal transport in thermoelectric materials with chemical bond hierarchy journal March 2019
Enhanced thermoelectric properties of CoSb 3 -based skutterudites by filling Se as electronegative element journal November 2018

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