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Title: Engineering the Thermoelectric Transport in Half-Heusler Materials through a Bottom-Up Nanostructure Synthesis

Journal Article · · Advanced Energy Materials
 [1];  [2];  [1];  [1];  [3];  [1];  [4];  [1];  [3];  [5];  [6];  [1]
  1. Chinese Academy of Sciences (CAS), Beijing (China). Beijing National Lab. for Condensed Matter Physics, Inst. of Physics
  2. Chinese Academy of Sciences (CAS), Beijing (China). Beijing National Lab. for Condensed Matter Physics, Inst. of Physics; Guangdong Univ. of Technology Guangzhou (China). Physics and Optoelectronic Engineering College
  3. Tongji Univ., Shanghai (China). School of Materials Science and Engineering
  4. Guangdong Univ. of Technology Guangzhou (China). Physics and Optoelectronic Engineering College
  5. Northwestern Univ., Evanston, IL (United States). Dept. of Materials Science and Engineering
  6. Univ. of Houston, TX (United States). Dept. of Physics and TcSUH

Half-Heusler (HH) alloys are among the best promising thermoelectric (TE) materials applicable for the middle-to-high temperature power generation. Despite of the large thermoelectric power factor and decent figure-of-merit ZT (≈1), their broad applications and enhancement on TE performance are limited by the high intrinsic lattice thermal conductivity (κL) due to insufficiencies of phonon scattering mechanisms, and the fewer powerful strategies associated with the microstructural engineering for HH materials. This study reports a bottom-up nanostructure synthesis approach for these HH materials based on the displacement reaction between metal chlorides/bromides and magnesium (or lithium), followed by vacuum-assisted spark plasma sintering process. The samples are featured with dense dislocation arrays at the grain boundaries, leading to a minimum κL of ≈1 W m-1 K-1 at 900 K and one of the highest ZT (≈1) and predicted η (≈11%) for n-type Hf0.25Zr0.75NiSn0.97Sb0.03. Further manipulation on the dislocation defects at the grain boundaries of p-type Nb0.8Ti0.2FeSb leads to enhanced maximum power factor of 47 × 10-4 W m-1 K-2 and the predicted η of ≈7.5%. Moreover, vanadium substitution in FeNb0.56V0.24Ti0.2Sb significantly promotes the η to ≈11%. This strategy can be extended to a broad range of advanced alloys and compounds for improved properties.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Solid-State Solar-Thermal Energy Conversion Center (S3TEC)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0001299; FG02-09ER46577
OSTI ID:
1470530
Alternate ID(s):
OSTI ID: 1393299
Journal Information:
Advanced Energy Materials, Vol. 7, Issue 18; Related Information: S3TEC partners with Massachusetts Institute of Technology (lead); Boston College; Oak Ridge National Laboratory; Rensselaer Polytechnic Institute; ISSN 1614-6832
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 43 works
Citation information provided by
Web of Science

References (42)

Liquid‐phase sintering of SmCo 5 journal June 1973
Effect of Hf Concentration on Thermoelectric Properties of Nanostructured N-Type Half-Heusler Materials Hf x Zr 1-x NiSn 0.99 Sb 0.01 journal May 2013
Magnetoelectric interaction and transport behaviours in magnetic nanocomposite thermoelectric materials journal October 2016
Mott's formula for the thermopower and the Wiedemann-Franz law journal May 1980
Beneficial Contribution of Alloy Disorder to Electron and Phonon Transport in Half-Heusler Thermoelectric Materials journal April 2013
High-performance half-Heusler thermoelectric materials Hf1−x ZrxNiSn1−ySby prepared by levitation melting and spark plasma sintering journal May 2009
Enhanced Thermoelectric Figure-of-Merit in Nanostructured p-type Silicon Germanium Bulk Alloys journal December 2008
Dense dislocation arrays embedded in grain boundaries for high-performance bulk thermoelectrics journal April 2015
Enhanced phonon scattering by mass and strain field fluctuations in Nb substituted FeVSb half-Heusler thermoelectric materials journal December 2012
Enhancing the Figure of Merit of Heavy-Band Thermoelectric Materials Through Hierarchical Phonon Scattering journal March 2016
Influence of the α/β-SiC phase transformation on microstructural development and mechanical properties of liquid phase sintered silicon carbide journal January 1999
BiCuSeO oxyselenides: new promising thermoelectric materials journal January 2014
New and Old Concepts in Thermoelectric Materials journal November 2009
Cubic AgPbmSbTe2+m: Bulk Thermoelectric Materials with High Figure of Merit journal February 2004
Mechanical properties of half-Heusler alloys journal April 2016
Preparation and thermoelectric properties of semiconducting Zn4Sb3 journal July 1997
Vacancy-induced dislocations within grains for high-performance PbSe thermoelectrics journal January 2017
High thermoelectric performance of MgAgSb-based materials journal July 2014
n-type thermoelectric material Mg 2 Sn 0.75 Ge 0.25 for high power generation journal March 2015
Achieving high power factor and output power density in p-type half-Heuslers Nb 1-x Ti x FeSb journal November 2016
Band Engineering of Thermoelectric Materials journal October 2012
Dislocation strain as the mechanism of phonon scattering at grain boundaries journal January 2016
Are Solid Solutions Better in FeNbSb-Based Thermoelectrics? journal November 2016
Lower limit to the thermal conductivity of disordered crystals journal September 1992
Band engineering of high performance p-type FeNbSb based half-Heusler thermoelectric materials for figure of merit zT > 1 journal January 2015
High-performance bulk thermoelectrics with all-scale hierarchical architectures journal September 2012
Thermoelectric Phenomena, Materials, and Applications journal August 2011
Band gap and stability in the ternary intermetallic compounds NiSn M ( M =Ti,Zr,Hf): A first-principles study journal April 1995
Half-Heusler compounds: novel materials for energy and spintronic applications journal April 2012
Relationship between thermoelectric figure of merit and energy conversion efficiency journal June 2015
Mechanical Alloying of Titanium-Base Alloys journal February 1993
Ultralow thermal conductivity and high thermoelectric figure of merit in SnSe crystals journal April 2014
Figure of merit for thermoelectrics journal February 1989
High-Thermoelectric Performance of Nanostructured Bismuth Antimony Telluride Bulk Alloys journal May 2008
Copper ion liquid-like thermoelectrics journal March 2012
Ultrahigh power factor and thermoelectric performance in hole-doped single-crystal SnSe journal November 2015
Model for Lattice Thermal Conductivity at Low Temperatures journal February 1959
Enhanced thermoelectric figure of merit in nanostructured n-type silicon germanium bulk alloy journal November 2008
Yb 14 MnSb 11 :  New High Efficiency Thermoelectric Material for Power Generation journal April 2006
Studies on mechanical properties of thermoelectric materials by nanoindentation: Studies on mechanical properties of thermoelectric materials journal June 2015
Nanostructural hierarchy increases the strength of aluminium alloys journal September 2010
High Efficiency Half-Heusler Thermoelectric Materials for Energy Harvesting journal July 2015

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Effect of Dislocation Arrays at Grain Boundaries on Electronic Transport Properties of Bismuth Antimony Telluride: Unified Strategy for High Thermoelectric Performance journal April 2018
Optimally Distributed Transport Properties Can Produce Highest Performance Thermoelectric Systems journal September 2019
Thermoelectric Effects of Nanogaps between Two Tips journal February 2018
Cost effective synthesis of p-type Zn-doped MgAgSb by planetary ball-milling with enhanced thermoelectric properties journal January 2018
Enhanced thermoelectric properties in N-type Mg 2 Si 0.4−x Sn 0.6 Sb x synthesized by alkaline earth metal reduction journal January 2019
High thermoelectric performance of single phase p-type cerium-filled skutterudites by dislocation engineering journal January 2018
The manipulation of substitutional defects for realizing high thermoelectric performance in Mg 3 Sb 2 -based Zintl compounds journal January 2019
Zr vacancy interfaces: an effective strategy for collaborative optimization of ZrNiSn-based thermoelectric performance journal January 2019
High-performance electron-doped GeMnTe 2 : hierarchical structure and low thermal conductivity journal January 2019
New insights into the role of dislocation engineering in N-type filled skutterudite CoSb 3 journal January 2019
High performance p-type half-Heusler thermoelectric materials journal February 2018
Multi-functional properties of non-centrosymmetric ternary half-Heuslers, RPdSb (R  =  Er and Ho) journal June 2018
Enhanced thermoelectric performance in p-type Mg 3 Sb 2 via lithium doping journal April 2018
Recent advances in non-Pb-based group-IV chalcogenides for environmentally-friendly thermoelectric materials journal April 2018
The Effects of Excess Co on the Phase Composition and Thermoelectric Properties of Half-Heusler NbCoSb journal May 2018
Phase Boundary Mapping in ZrNiSn Half-Heusler for Enhanced Thermoelectric Performance journal January 2020