Synergy of grain size and texture effect for high-performance Mg3Sb2-based thermoelectric materials

Hu, Lianglu; Zhang, Qiang; Shan, Zhaohui; Wang, Lifei; Zheng, Yun; Fan, Jianfeng

doi:10.1016/j.scriptamat.2023.115629

Cited by 5 publications

(2 citation statements)

References 27 publications

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“…The disparity regarding grain size along the different directions may be attributed to the preferred grain orientation and growth, as well as the compressive deformation along the perpendicular HP direction. 48 In Fig. 3(b) and (c), a specific preferred orientation is identified for the grains in the sample perpendicular to the HP direction, where the <100> direction of most grains aligns parallel to the HP direction.…”

Section: Resultsmentioning

confidence: 94%

Synergistic optimization of the thermoelectric performance of BiSbSe₃ using doping and multi-scale defect engineering

Shi,

Tian,

Jiang

et al. 2024

J. Mater. Chem. A

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Section: Resultsmentioning

confidence: 94%

Synergistic optimization of the thermoelectric performance of BiSbSe₃ using doping and multi-scale defect engineering

Shi,

Tian,

Jiang

et al. 2024

J. Mater. Chem. A

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“…A series of high-performing TE materials have been investigated i.e. Bi 2 Te 3 -based-materials [10][11][12][13], PbTe-based compounds [14][15][16][17][18], skutterudites [19][20][21][22][23], half-Heusler alloys [24][25][26][27][28][29], Zintl compounds [30][31][32][33][34][35][36][37][38] and so on. For room temperature applications, (Bi,Sb) 2 (Te,Se) 3 -based materials are recognized as the best system for decades due to their high ZT value which varied between 1 and 2 [39].…”

Section: Introductionmentioning

confidence: 99%

Reduced thermal conductivity and enhanced TE performance in CrSb₂ via Fe-Bi co-substitution

Bano,

Sk,

Aizawa

et al. 2024

Nanotechnology

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The efficiency of thermoelectric (TE) technology relies on the performance of TE materials. Substitution with heavy elements is an effective strategy in TE for enhancing phonon scattering without much affecting electrical transport properties. However, selecting suitable dopants to achieve a high thermoelectric figure-of-merit (ZT) poses a significant challenge. Thus, in this study, the efficacy of combined (Fe and Bi) co-substitution in CrSb2 is investigated as a promising strategy to enhance ZT by lowering thermal conductivity. A series of co-doped Cr1-xFexBiySb2-y (x = 0, 0.25, 0.50, 0.75, 1 and y = 0.10, 0.15, 0.20,0.25) samples were synthesized via furnace reaction followed by spark plasma sintering technique. Phase analysis and temperature dependence TE transport properties were systematically studied on synthesized samples. Furthermore, to analyze the impact of disorder induced by Bi/Fe substitution, electronic structure calculation was performed using the projector augmented-wave method. Notably, Cr0.75Fe0.25Bi0.15Sb1.85 exhibited a low thermal conductivity of ~ 2.5 W m-1 K-1 at 300 K, which reduced to half compared to that of pristine CrSb2 (~ 5 W m-1 K-1). This reduction is attributed to the introduction of significant mass fluctuations and point defects along with the presence of Bi at grain boundaries by co-substitution. Consequently, a remarkable 90% enhancement in ZT (~0.021) at 350 K was achieved for Cr0.75Fe0.25Bi0.15Sb1.85 compared to that of pristine CrSb2 (ZT~0.012). This study can provide valuable insights into the rational design of effective dopants in other TE materials also.

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Green Thermoelectric Materials and Nanocomposites

Ramadan,

Shehata,

Alami

et al. 2024

Reference Module in Materials Science and Materials Engineering

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Synergy of grain size and texture effect for high-performance Mg3Sb2-based thermoelectric materials

Cited by 5 publications

References 27 publications

Synergistic optimization of the thermoelectric performance of BiSbSe₃ using doping and multi-scale defect engineering

Synergistic optimization of the thermoelectric performance of BiSbSe₃ using doping and multi-scale defect engineering

Reduced thermal conductivity and enhanced TE performance in CrSb₂ via Fe-Bi co-substitution

Green Thermoelectric Materials and Nanocomposites

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Synergy of grain size and texture effect for high-performance Mg3Sb2-based thermoelectric materials

Cited by 5 publications

References 27 publications

Synergistic optimization of the thermoelectric performance of BiSbSe3 using doping and multi-scale defect engineering

Synergistic optimization of the thermoelectric performance of BiSbSe3 using doping and multi-scale defect engineering

Reduced thermal conductivity and enhanced TE performance in CrSb2 via Fe-Bi co-substitution

Green Thermoelectric Materials and Nanocomposites

Contact Info

Product

Resources

About

Synergistic optimization of the thermoelectric performance of BiSbSe₃ using doping and multi-scale defect engineering

Synergistic optimization of the thermoelectric performance of BiSbSe₃ using doping and multi-scale defect engineering

Reduced thermal conductivity and enhanced TE performance in CrSb₂ via Fe-Bi co-substitution