Revelation of Inherently High Mobility Enables Mg3Sb2 as a Sustainable Alternative to n-Bi2Te3 Thermoelectrics

doi:10.1002/advs.201802286

Title: Revelation of Inherently High Mobility Enables Mg ₃Sb ₂ as a Sustainable Alternative to n-Bi ₂Te ₃ Thermoelectrics

Abstract

Over the past years, thermoelectric Mg ₃Sb ₂ alloys particularly in n-type conduction, have attracted increasing attentions for thermoelectric applications, due to the multivalley conduction band, abundance of constituents, and less toxicity. However, the high vapor pressure, causticity of Mg, and the high melting point of Mg ₃Sb ₂ tend to cause the inclusion in the materials of boundary phases and defects that affect the transport properties. In this work, a utilization of tantalum-sealing for melting enables n-type Mg ₃Sb ₂ alloys to show a substantially higher mobility than ever reported, which can be attributed to the purification of phases and to the coarse grains. Importantly, the inherently high mobility successfully enables the thermoelectric figure of merit in optimal compositions to be highly competitive to that of commercially available n-type Bi ₂Te ₃ alloys and to be higher than that of other known n-type thermoelectrics at 300-500 K. This work reveals Mg ₃Sb ₂ alloys as a top candidate for near-room-temperature thermoelectric applications.

Authors:

Shi, Xuemin ^[1]; Sun, Cheng ^[1]; Bu, Zhonglin ^[1]; Zhang, Xinyue ^[1]; Wu, Yixuan ^[1]; Lin, Siqi ^[1]; Li, Wen ^[1]; Faghaninia, Alireza ^[2]; Jain, Anubhav ^[2];

^[1]

Tongji Univ., Shanghai (China). School of Materials Science and Engineering, Interdisciplinary Materials Research Center
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Publication Date:: 2019-06-11

Research Org.:: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Org.:: USDOE Office of Science (SC); National Natural Science Foundation of China (NNSFC)

OSTI Identifier:: 1560221

Alternate Identifier(s):: OSTI ID: 1560224; OSTI ID: 1560607

Grant/Contract Number:: AC02-05CH11231

Resource Type:: Published Article

Journal Name:: Advanced Science

Additional Journal Information:: Journal Volume: 6; Journal Issue: 16; Journal ID: ISSN 2198-3844

Publisher:: Wiley

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE

Citation Formats


                    Shi, Xuemin, Sun, Cheng, Bu, Zhonglin, Zhang, Xinyue, Wu, Yixuan, Lin, Siqi, Li, Wen, Faghaninia, Alireza, Jain, Anubhav, and Pei, Yanzhong. Revelation of Inherently High Mobility Enables Mg3Sb2 as a Sustainable Alternative to n-Bi2Te3 Thermoelectrics.  United States: N. p., 2019. 
        Web.  doi:10.1002/advs.201802286.

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                    Shi, Xuemin, Sun, Cheng, Bu, Zhonglin, Zhang, Xinyue, Wu, Yixuan, Lin, Siqi, Li, Wen, Faghaninia, Alireza, Jain, Anubhav, & Pei, Yanzhong. Revelation of Inherently High Mobility Enables Mg3Sb2 as a Sustainable Alternative to n-Bi2Te3 Thermoelectrics.  United States.  doi:10.1002/advs.201802286.

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                    Shi, Xuemin, Sun, Cheng, Bu, Zhonglin, Zhang, Xinyue, Wu, Yixuan, Lin, Siqi, Li, Wen, Faghaninia, Alireza, Jain, Anubhav, and Pei, Yanzhong. Tue .  
        "Revelation of Inherently High Mobility Enables Mg3Sb2 as a Sustainable Alternative to n-Bi2Te3 Thermoelectrics".  United States.  doi:10.1002/advs.201802286.

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@article{osti_1560221,

  title        = {Revelation of Inherently High Mobility Enables Mg3Sb2 as a Sustainable Alternative to n-Bi2Te3 Thermoelectrics},

  author       = {Shi, Xuemin and Sun, Cheng and Bu, Zhonglin and Zhang, Xinyue and Wu, Yixuan and Lin, Siqi and Li, Wen and Faghaninia, Alireza and Jain, Anubhav and Pei, Yanzhong},

  abstractNote = {Over the past years, thermoelectric Mg3Sb2 alloys particularly in n-type conduction, have attracted increasing attentions for thermoelectric applications, due to the multivalley conduction band, abundance of constituents, and less toxicity. However, the high vapor pressure, causticity of Mg, and the high melting point of Mg3Sb2 tend to cause the inclusion in the materials of boundary phases and defects that affect the transport properties. In this work, a utilization of tantalum-sealing for melting enables n-type Mg3Sb2 alloys to show a substantially higher mobility than ever reported, which can be attributed to the purification of phases and to the coarse grains. Importantly, the inherently high mobility successfully enables the thermoelectric figure of merit in optimal compositions to be highly competitive to that of commercially available n-type Bi2Te3 alloys and to be higher than that of other known n-type thermoelectrics at 300-500 K. This work reveals Mg3Sb2 alloys as a top candidate for near-room-temperature thermoelectric applications.},

  doi          = {10.1002/advs.201802286},

  journal      = {Advanced Science},

  number       = 16,

  volume       = 6,

  place        = {United States},

  year         = {2019},

  month        = {6}

}

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Works referenced in this record:

Complex thermoelectric materials
journal, February 2008

Snyder, G. Jeffrey; Toberer, Eric S.
Nature Materials, Vol. 7, Issue 2, p. 105-114
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Convergence of electronic bands for high performance bulk thermoelectrics
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Pei, Yanzhong; Shi, Xiaoya; LaLonde, Aaron
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High Lattice Thermal Conductivity Solids
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Morelli, Donald T.; Slack, Glen A.; Shindé, Subhash L.
High Thermal Conductivity Materials, p. 37-68
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Cubic AgPb_mSbTe_2+m: Bulk Thermoelectric Materials with High Figure of Merit
journal, February 2004

Hsu, Kuei Fang; Loo, Sim; Guo, Fu
Science, Vol. 303, Issue 5659, p. 818-821
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Intrinsically Minimal Thermal Conductivity in Cubic $I − V − {VI}_{2}$ Semiconductors
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Morelli, D. T.; Jovovic, V.; Heremans, J. P.
Physical Review Letters, Vol. 101, Issue 3, Article No. 035901
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High-Thermoelectric Performance of Nanostructured Bismuth Antimony Telluride Bulk Alloys
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Poudel, B.; Hao, Q.; Ma, Y.
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Copper ion liquid-like thermoelectrics
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Liu, Huili; Shi, Xun; Xu, Fangfang
Nature Materials, Vol. 11, Issue 5, p. 422-425
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Title: Revelation of Inherently High Mobility Enables Mg 3Sb 2 as a Sustainable Alternative to n-Bi 2Te 3 Thermoelectrics

Abstract

Citation Formats

Complex thermoelectric materials journal, February 2008

Convergence of electronic bands for high performance bulk thermoelectrics journal, May 2011

High Lattice Thermal Conductivity Solids book, January 2006

Cubic AgPbmSbTe2+m: Bulk Thermoelectric Materials with High Figure of Merit journal, February 2004

Intrinsically Minimal Thermal Conductivity in Cubic I−V−VI2 Semiconductors journal, July 2008

High-Thermoelectric Performance of Nanostructured Bismuth Antimony Telluride Bulk Alloys journal, May 2008

Copper ion liquid-like thermoelectrics journal, March 2012

Title: Revelation of Inherently High Mobility Enables Mg ₃Sb ₂ as a Sustainable Alternative to n-Bi ₂Te ₃ Thermoelectrics

Complex thermoelectric materials
journal, February 2008

Convergence of electronic bands for high performance bulk thermoelectrics
journal, May 2011

High Lattice Thermal Conductivity Solids
book, January 2006

Cubic AgPb_mSbTe_2+m: Bulk Thermoelectric Materials with High Figure of Merit
journal, February 2004

Intrinsically Minimal Thermal Conductivity in Cubic $I − V − {VI}_{2}$ Semiconductors
journal, July 2008

High-Thermoelectric Performance of Nanostructured Bismuth Antimony Telluride Bulk Alloys
journal, May 2008

Copper ion liquid-like thermoelectrics
journal, March 2012