A general design strategy for thermoelectric interface materials in n-type Mg3Sb1.5Bi0.5 single leg used in TEGs
Source abstract
Abstract
The reliability of thermoelectric power generators (TEGs) depends heavily on the contact interface between thermoelectric (TE) materials and electrodes. We propose a general alloying approach for generating TE interface materials (TEiMs) for n-type Mg 3Sb 1.5Bi 0.5 systems. The TEiM serves as a metallisation layer or barrier that precedes the soldering assembly. We first selected Fe from 15 elements as the matrix element considering the criteria of high bonding strength and low interfacial resistivity. Following the principles of high bonding propensity, coefficient of thermal expansion (CTE) matching, diffusion passivation, and dopant inactivation, two types of ternary alloys (Fe 7Mg 2Cr and Fe 7Mg 2 Ti) with shear strengths ( σ s ) of > 40 MPa and the specific contact resistivities ( ρ c ) of < 5 µΩ cm 2 were obtained. Furthermore, the thermal stability of the TEiM/Mg 3Sb 1.5Bi 0.5 contact interface was investigated employing aging treatment. The contact interface exhibited high shear strength ( σ s > 30 MPa ), low specific contact resistivity ( ρ c < 10 μ Ω c m 2 ), and excellent thermal stability after aging treatment at 400 °C for 15 days. The general TEiM design strategy presented herein will contribute to further optimization of contact interfaces in TEG devices.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced Thermoelectric Materials and Devices · Thermal Expansion and Ionic Conductivity · Thermal properties of materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (55)
Show source-provided references
1. Cooling, heating, generating power, and recovering waste heat with thermoelectric systems10.1126/science.1158899 ↗
2. Enhanced atomic ordering leads to high thermoelectric performance in AgSbTe210.1126/science.abb3517 ↗
3. Thermoelectric materials and applications for energy harvesting power generation10.1080/14686996.2018.1530938 ↗
4. Thermoelectricity for IoT-a review10.1016/j.nanoen.2018.10.013 ↗
5. Advanced thermoelectric design: from materials and structures to devices10.1021/acs.chemrev.0c00026 ↗
6. Interfacial advances yielding high efficiencies for thermoelectric devices10.1039/D0TA06471H ↗
7. Excessively doped PbTe with Ge-induced nanostructures enables high-efficiency thermoelectric modules10.1016/j.joule.2018.04.025 ↗
8. Current progress and future challenges in thermoelectric power generation: from materials to devices10.1016/j.actamat.2014.12.042 ↗
9. An integrated approach to thermoelectrics: combining phonon dynamics, nanoengineering, novel materials development, module fabrication, and metrology
10. Understanding of the contact of nanostructured thermoelectric n-type Bi2Te2.7Se0.3 legs for power generation applications10.1039/c3ta13456c ↗
11. Reliable n-type Mg3.2Sb1.5Bi0.49Te0.01/304 stainless steel junction for thermoelectric applications10.1016/j.actamat.2020.07.058 ↗
12. Thermoelectric devices: a review of devices, architectures, and contact optimization
13. Thermoelectric interface materials: a perspective to the challenge of thermoelectric power generation module10.1016/j.jmat.2019.04.004 ↗
14. Liu · 2017 · 603
15. Concentrating solar thermoelectric generators with a peak efficiency of 7.4%10.1038/nenergy.2016.153 ↗
16. Exceptional thermoelectric performance in Mg3Sb0.6Bi1.4 for low-grade waste heat recovery10.1039/C8EE03374A ↗
17. Revelation of inherently high mobility enables Mg3Sb2 as a sustainable alternative to n-Bi2Te3 thermoelectrics10.1002/advs.201802286 ↗
18. Mg3+δSbxBi2−x family: a promising substitute for the state-of-the-art n-type thermoelectric materials near room temperature10.5772/intechopen.76823 ↗
19. High thermoelectric cooling performance of n-type Mg3Bi2-based materials10.1126/science.aax7792 ↗
20. Isotropic conduction network and defect chemistry in Mg3+δSb2-based layered zintl compounds with high thermoelectric performance10.1002/adma.201603955 ↗
21. Discovery of high-performance low-cost n-type Mg3Sb2-based thermoelectric materials with multi-valley conduction bands10.1038/ncomms13901 ↗
22. Realizing high conversion efficiency of Mg3Sb2-based thermoelectric materials10.1016/j.jpowsour.2019.01.022 ↗
23. N-type Mg3Sb2-xBix with improved thermal stability for thermoelectric power generation10.1016/j.actamat.2020.10.035 ↗
24. Scalable synthesis of n-type Mg3Sb2-xBix for thermoelectric applications
25. Demonstration of ultrahigh thermoelectric efficiency of ∼7.3% in Mg3Sb2/MgAgSb module for low-temperature energy harvesting10.1016/j.joule.2021.03.017 ↗
26. High thermoelectric energy conversion efficiency of a unicouple of n-type Mg3Bi2 and p-type Bi2Te3
27. Towards tellurium-free thermoelectric modules for power generation from low-grade heat10.1038/s41467-021-21391-1 ↗
28. An over 10% module efficiency using non-Bi2Te3 thermoelectric materials for recovering heat of <600 K10.1039/D1EE02253A ↗
29. The electronic transport channel protection and tuning in real space to boost the thermoelectric performance of Mg3+δSb2-yBiy near Room temperature
30. Mo-Fe/NbFeSb thermoelectric junctions: anti-thermal aging interface and low contact resistivity10.1021/acsami.0c21813 ↗
31. On linear expansion coefficient and melting point of metals10.1063/1.1700113 ↗
32. A history of solution theory10.1146/annurev.pc.32.100181.000245 ↗
33. 2002
34. Electrode interface optimization advances conversion efficiency and stability of thermoelectric devices10.1038/s41467-020-16508-x ↗
35. High efficiency GeTe-based materials and modules for thermoelectric power generation10.1039/D0EE02791J ↗
36. Simultaneous improvement of power factor and thermal conductivity via Ag doping in p-type Mg3Sb2 thermoelectric materials10.1039/C6TA08316A ↗
37. Thermoelectric properties of nanocrystalline (Mg1−xZnx)3Sb2 isostructural solid solutions fabricated by mechanical alloying10.1088/0022-3727/42/16/165403 ↗
38. Electronic structures and stability of Ni/Bi2Te3 and Co/Bi2Te3 interfaces10.1088/0022-3727/43/11/115303 ↗
39. Bond strength of vacuum brazed Mg-PSZ/steel joints10.1016/0025-5408(87)90127-9 ↗
40. Berechnung der fließgrenze von mischkristallen auf grund der plastizitätsbedingung für einkristalle10.1002/zamm.19290090104 ↗
41. Thermoelectric properties of Mn-doped Mg-Sb single crystals10.1039/C4TA02386B ↗
42. Improved thermoelectric properties of n-type Mg3Sb2 through cation-site doping with Gd or Ho10.1021/acsami.0c22558 ↗
43. Efficient Sc-Doped Mg3.05-xScxSbBi Thermoelectrics Near Room Temperature10.1021/acs.chemmater.9b03156 ↗
44. Demonstration of ultrahigh thermoelectric efficiency of ∼7.3% in Mg3Sb2/MgAgSb module for low-temperature energy harvesting10.1016/j.joule.2021.03.017 ↗
45. Manipulation of ionized impurity scattering for achieving high thermoelectric performance in n-type Mg3Sb2-based materials10.1073/pnas.1711725114 ↗
46. Band structure and thermoelectric properties of Al-doped Mg3−xAlxSb2 compounds
47. Nb-mediated grain growth and grain-boundary engineering in Mg3Sb2-bsed thermoelectric materials10.1002/adfm.202100258 ↗
48. Tuning the carrier scattering mechanism to effectively improve the thermoelectric properties10.1039/C7EE00098G ↗
49. Thermoelectric properties of Na-doped Zintl compound: Mg3-xNaxSb210.1016/j.actamat.2015.04.023 ↗
50. Improvement of low-temperature ZT in a Mg3Sb2 -Mg3Bi2 solid solution via Mg-vapor annealing10.1002/adma.201902337 ↗
51. Mg deficiency in grain boundaries of n-Type Mg3Sb2 identified by atom probe tomography10.1002/admi.201900429 ↗
52. The effect of Ti on the microstructure and mechanical properties of (Ti+Mg3Sb2)Mg composites
53. Interfacial evolution behavior and reliability evaluation of CoSb3/Ti/Mo-Cu thermoelectric joints during accelerated thermal aging10.1016/j.jallcom.2008.10.037 ↗
54. Study on the high temperature interfacial stability of Ti/Mo/Yb0.3Co4Sb12 thermoelectric joints10.3390/app7090952 ↗
55. Interface stability of skutterudite thermoelectric materials/Ti88Al1210.15541/jim20170517 ↗