skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: High thermoelectric performance in Bi0.46Sb1.54Te3 nanostructured with ZnTe

Journal Article · · Energy & Environmental Science
DOI:https://doi.org/10.1039/c8ee00290h· OSTI ID:1775290

Defect engineering and nano-structuring are the core stratagems for improving thermoelectric properties. In bismuth telluride alloys nanosizing individual crystallites has been extensively studied in efforts to reduce the thermal conductivity, but nanostructuring with second phases has been more challenging. In this study, we demonstrate a thermoelectric figure of merit ZT of 1.4 at 400 K, realized in Zn-containing BiSbTe alloys (specifically Bi0.46Sb1.54Te3) by integrating defect complexity with nanostructuring. We have succeeded in creating nanostructured BiSbTe alloys containing ZnTe nanoprecipitates. We present a melt-spinning-based synthesis that forms in situ ZnTe nanoprecipitates to produce an extremely low lattice thermal conductivity of ~0.35 W m–1 K–1 at 400 K, approaching the amorphous limit in the Bi2–xSbxTe3 system, while preserving the high power factor of Bi0.46Sb1.54Te3. These samples show excellent repeatability and thermal stability at temperatures up to 523 K. DFT calculations and experimental results show that Zn is inclined to form dual site defects, including two substitutional defects ZnBi/Sb' and a Te vacancy, to achieve full charge compensation, which was further explicitly corroborated by Positron annihilation measurement. The strong enhancement of thermoelectric properties was validated in a thermoelectric module fabricated with the melt-spun p-legs (ZnTe-nanostructured BiSbTe) and zone-melt n-legs (conventional BiTeSe) which achieved a thermoelectric conversion efficiency of 5.0% when subjected to a temperature gradient of 250 K, representing about 40% improvement compared with a commercial zone-melt-based module. Furthermore, the results presented here represent a significant step forward for applications in thermoelectric power generation.

Research Organization:
Northwestern Univ., Evanston, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0014520
OSTI ID:
1775290
Alternate ID(s):
OSTI ID: 1434120
Journal Information:
Energy & Environmental Science, Vol. 11, Issue 6; ISSN 1754-5692
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 216 works
Citation information provided by
Web of Science

References (49)

Generalized Gradient Approximation Made Simple journal October 1996
Nanostructured thermoelectric: Opportunities and challenges journal September 2012
Positron Annihilation Study of Ternary Sb2Te3−x Se x for Its Tuning Electrical and Thermal Properties journal October 2016
Rationally Designing High-Performance Bulk Thermoelectric Materials journal August 2016
Defect structure of Pb-doped Bi 2 Te 3 single crystals journal July 2004
High efficiency Bi 2 Te 3 -based materials and devices for thermoelectric power generation between 100 and 300 °C journal January 2016
Nanocomposites from Solution-Synthesized PbTe-BiSbTe Nanoheterostructure with Unity Figure of Merit at Low-Medium Temperatures (500-600 K) journal January 2017
Enhanced performances of melt spun Bi2(Te,Se)3 for n-type thermoelectric legs journal July 2011
Introduction to Thermoelectricity book January 2016
Phase diagram of In–Co–Sb system and thermoelectric properties of In-containing skutterudites journal January 2014
Improvement of Thermoelectric Properties of Bi0.4Sb1.6Te3 with Addition of Nanoscale Zinc Oxide Particles journal August 2015
Lower limit to the thermal conductivity of disordered crystals journal September 1992
Structural transition of partially Ba-filled thermoelectric CoSb 3 investigated by positron annihilation spectroscopy journal February 2015
Interplay between Point Defects and Thermal Conductivity of Chemically Synthesized Bi 2 Te 3 Nanocrystals Studied by Positron Annihilation journal September 2014
Unique nanostructures and enhanced thermoelectric performance of melt-spun BiSbTe alloys journal March 2009
Charge-Compensated Compound Defects in Ga-containing Thermoelectric Skutterudites journal February 2013
The Role of Zn in Chalcopyrite CuFeS 2 : Enhanced Thermoelectric Properties of Cu 1- x Zn x FeS 2 with In Situ Nanoprecipitates journal October 2016
A review of thermoelectric cooling: Materials, modeling and applications journal May 2014
Better thermoelectrics through glass-like crystals journal November 2015
Model for Lattice Thermal Conductivity at Low Temperatures journal February 1959
Compound tellurides and their alloys for peltier cooling—A review journal October 1972
Advances in thermoelectric materials research: Looking back and moving forward journal September 2017
Mechanically Robust BiSbTe Alloys with Superior Thermoelectric Performance: A Case Study of Stable Hierarchical Nanostructured Thermoelectric Materials journal November 2014
Material and manufacturing cost considerations for thermoelectrics journal April 2014
Enhanced thermoelectric figure of merit in p-type β-Zn 4 Sb 3 /Bi 0.4 Sb 1.6 Te 3 nanocomposites journal January 2016
Crystal Structures and Thermoelectric Properties of Layered Compounds in the ATe–Bi 2 Te 3 (A = Ge, Sn, Pb) Systems journal May 2004
In Situ Precipitation of Te Nanoparticles in p-Type BiSbTe and the Effect on Thermoelectric Performance journal January 2013
Effect of Point Imperfections on Lattice Thermal Conductivity journal November 1960
Roles of Cu in the Enhanced Thermoelectric Properties in Bi0.5Sb1.5Te3 journal March 2017
Boundary Engineering for the Thermoelectric Performance of Bulk Alloys Based on Bismuth Telluride journal March 2015
A review on the enhancement of figure of merit from bulk to nano-thermoelectric materials journal March 2013
Recent advances in thermoelectric nanocomposites journal January 2012
Effective thermal conductivity of particulate composites with interfacial thermal resistance journal May 1997
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set journal October 1996
Cooling, Heating, Generating Power, and Recovering Waste Heat with Thermoelectric Systems journal September 2008
High thermoelectric performance in (Bi 0.25 Sb 0.75 ) 2 Te 3 due to band convergence and improved by carrier concentration control journal October 2017
Thermoelectric performance enhancement in n-type Bi2(TeSe)3 alloys owing to nanoscale inhomogeneity combined with a spark plasma-textured microstructure journal June 2016
Rapid preparation method of bulk nanostructured Yb0.3Co4Sb12+y compounds and their improved thermoelectric performance journal December 2008
High Performance Thermoelectrics from Earth-Abundant Materials: Enhanced Figure of Merit in PbS by Second Phase Nanostructures journal December 2011
Electrical and thermal transport properties of spark plasma sintered n-type Bi 2 Te 3−x Se x alloys: the combined effect of point defect and Se content journal January 2015
Thermal Stability of P-Type BiSbTe Alloys Prepared by Melt Spinning and Rapid Sintering journal June 2017
Towards higher thermoelectric performance of Bi2Te3 via defect engineering journal January 2016
Preparation and thermoelectric transport properties of high-performance p-type Bi2Te3 with layered nanostructure journal January 2007
Non-equilibrium processing leads to record high thermoelectric figure of merit in PbTe–SrTe journal July 2016
Special quasirandom structures journal July 1990
Preparation and thermoelectric properties of iodine-doped Bi2Te3-Bi2Se3 solid solutions journal September 2014
High-Thermoelectric Performance of Nanostructured Bismuth Antimony Telluride Bulk Alloys journal May 2008
Magnetic and transport properties of Sb2−xFexTe3 (0<x<0.02) single crystals journal February 2006
Point Defect Engineering of High-Performance Bismuth-Telluride-Based Thermoelectric Materials journal June 2014

Similar Records

Quaternary Chalcogenide Semiconductors with 2D Structures: Rb2ZnBi2Se5 and Cs6Cd2Bi8Te17
Journal Article · Mon Jul 16 00:00:00 EDT 2018 · Inorganic Chemistry · OSTI ID:1775290

High thermoelectric performance in Bi 0.46 Sb 1.54 Te 3 nanostructured with ZnTe
Journal Article · Mon Jan 01 00:00:00 EST 2018 · Energy & Environmental Science · OSTI ID:1775290

Prediction of Bi2Te3-Sb2Te3 Interfacial Conductance and Superlattice Thermal Conductivity Using Molecular Dynamics Simulations
Journal Article · Tue Jan 12 00:00:00 EST 2021 · ACS Applied Materials and Interfaces · OSTI ID:1775290

Related Subjects