Realizing high figure of merit in heavy-band p-type half-Heusler thermoelectric materials

Nature Communications
Chenguang FuTiejun Zhu

Abstract

Solid-state thermoelectric technology offers a promising solution for converting waste heat to useful electrical power. Both high operating temperature and high figure of merit zT are desirable for high-efficiency thermoelectric power generation. Here we report a high zT of ∼1.5 at 1,200 K for the p-type FeNbSb heavy-band half-Heusler alloys. High content of heavier Hf dopant simultaneously optimizes the electrical power factor and suppresses thermal conductivity. Both the enhanced point-defect and electron-phonon scatterings contribute to a significant reduction in the lattice thermal conductivity. An eight couple prototype thermoelectric module exhibits a high conversion efficiency of 6.2% and a high power density of 2.2 W cm(-2) at a temperature difference of 655 K. These findings highlight the optimization strategy for heavy-band thermoelectric materials and demonstrate a realistic prospect of high-temperature thermoelectric modules based on half-Heusler alloys with low cost, excellent mechanical robustness and stability.

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Citations

Sep 1, 2016·Chemical Reviews·Gangjian TanMercouri G Kanatzidis
Oct 7, 2016·Journal of the American Chemical Society·Guodong TangLi-Dong Zhao
Mar 7, 2017·Advanced Materials·Tiejun ZhuXinbing Zhao
Jul 12, 2017·Physical Chemistry Chemical Physics : PCCP·Tianhua ZouAnke Weidenkaff
Jul 15, 2017·Journal of the American Chemical Society·Yong Kyu LeeIn Chung
Apr 25, 2018·Materials·Michael Schwall, Benjamin Balke
Jun 21, 2016·Physical Chemistry Chemical Physics : PCCP·Q Y XueJ Shi
May 22, 2018·Physical Chemistry Chemical Physics : PCCP·Shuping GuoYongsheng Zhang
Jul 28, 2016·Nature Communications·Gangjian TanMercouri G Kanatzidis
Sep 15, 2017·Nature·Wenyu ZhaoJing Shi
Jul 8, 2016·Proceedings of the National Academy of Sciences of the United States of America·Jing ShuaiZhifeng Ren
Jun 29, 2018·Nature Communications·Hangtian ZhuZhifeng Ren
Jul 6, 2019·Physical Chemistry Chemical Physics : PCCP·D SidharthR Jayavel
Jul 10, 2019·Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences·Gangjian TanMercouri G Kanatzidis
May 31, 2019·Advanced Materials·Yuan WangZhi-Gang Chen
Jan 19, 2019·Nature Communications·Hangtian ZhuZhifeng Ren
Mar 14, 2020·Science and Technology of Advanced Materials·Ruijuan YanAnke Weidenkaff
Jun 17, 2020·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Sonu Prasad Keshri, Amal Medhi
Jul 24, 2020·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Omosede Eromwon Osafile, Judith O Azi
Jun 26, 2020·Materials·Akihiro TsurutaIchiro Terasaki
Jul 17, 2020·Advanced Science·Roozbeh Siavash MoakharMichael Saliba
May 11, 2019·Physical Review Letters·Trond I AndersenAlessandro Principi
Feb 15, 2020·Research : a Science Partner Journal·Xiaofang LiQian Zhang

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Methods Mentioned

BETA
electron probe
X-ray

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