Recent progress in magnesium-based thermoelectric materials

Santos, Rafael; Yamini, Sima Aminorroaya; Dou, Shi Xue

doi:10.1039/c7ta10415d

Cited by 75 publications

(64 citation statements)

References 120 publications

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“…Hall effect measurements show the Sb 2 Si 2 Te 6 has an intrinsically high hole concentration of $5.6 3 10 19 cm À3 at room temperature, which is in the same order of magnitude as bismuth antimony telluride 34 and Mg 2 Sn. 35 The Seebeck coefficients (Figure 1F) are consistent with the heavily doped p-type semiconductor behavior and show weak orientation dependence, which continuously increases from $121 mVK À1 (in plane)/125 mVK À1 (cross plane) at 310 K to $239 mVK À1 (in plane)/238 mVK À1 (cross plane) at 823 K. We used a single parabolic band model with acoustic phonon and point defects scattering dominant (scattering parameter r = À1/2) 36,37 to analyze the charge carrier transport properties. The experimental density-of-states effective mass m d * was estimated to be $0.87 m 0 at room temperature, which is slightly higher than the one estimated from the calculated band structure (0.73 m 0 ) and may result from the higher carrier concentration and temperature in the experiment.…”

Section: Thermoelectric Properties Of Sb 2 Si 2 Tementioning

confidence: 99%

High-Performance Thermoelectrics from Cellular Nanostructured Sb2Si2Te6

Luo

Cai

Hao

et al. 2020

Joule

113

127

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Sb 2 Si 2 Te 6 , a 2D material, exhibits an intrinsically high thermoelectric figure of merit ZT of 1.08 at 823 K. The thermoelectric performance can be further enhanced by a cellular nanostructure with ultrathin Si 2 Te 3 nanosheets covering the Sb 2 Si 2 Te 6 grains. The Si 2 Te 3 acts as a hole-transmitting electron-blocking filter and, at the same time, causes extra phonon scattering that leads to ultralow thermal conductivity and a high ZT value of 1.65 at 823 K.

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Section: Thermoelectric Properties Of Sb 2 Si 2 Tementioning

confidence: 99%

High-Performance Thermoelectrics from Cellular Nanostructured Sb2Si2Te6

Luo

Cai

Hao

et al. 2020

Joule

113

127

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“…Copyright © 2018, Wiley Online Library. ( e ) Temperature dependence of figure of merit (ZT) of p-type magnesium-based thermoelectric materials (Mg 2 Ge, Mg 2 Sn, Mg 2 Si, Mg 2 Si 0.6 Ge 0.4 , Mg 2 Si 0.3 Sn 0.7 , Mg 2 Ge 0.25 Sn 0.75 , and Mg 2 Si 0.3 Ge 0.05 Sn 0.65 ) and n-type magnesium-based thermoelectric materials(Mg 2 Sn, Mg 2 Si, Mg 2 Si 0.6 Ge 0.4 , Mg 2 Si 0.3 Sn 0.7 , Mg 2 Ge 0.4 Sn 0.6 ), Reproduced with permission from [ 85 ]. Copyright © 2018, Royal Society of Chemistry.…”

Section: Temperature-dependent Classification Of Low-toxic Earth-abundant Thermoelectric Materialsmentioning

confidence: 99%

Low-Toxic, Earth-Abundant Nanostructured Materials for Thermoelectric Applications

2021

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This article presents recent research directions in the study of Earth-abundant, cost-effective, and low-toxic advanced nanostructured materials for thermoelectric generator (TEG) applications. This study’s critical aspect is to systematically evaluate the development of high-performance nanostructured thermoelectric (TE) materials from sustainable sources, which are expected to have a meaningful and enduring impact in developing a cost-effective TE system. We review both the performance and limitation aspects of these materials at multiple temperatures from experimental and theoretical viewpoints. Recent developments in these materials towards enhancing the dimensionless figure of merit, Seebeck coefficient, reduction of the thermal conductivity, and improvement of electrical conductivity have also been discussed in detail. Finally, the future direction and the prospects of these nanostructured materials have been proposed.

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“…Numerous alternative materials to PbTefor example, skutterudites, [7,16] half-Heuslers, [86,87] silicides, [88,89] and oxides [89,90] have recently been investigated. Among them, we have focused on sulfide systems because of the low toxicity and abundance of sulfur.…”

Section: Alternative To Pbtementioning

confidence: 99%

An Integrated Approach to Thermoelectrics: Combining Phonon Dynamics, Nanoengineering, Novel Materials Development, Module Fabrication, and Metrology

Ohta

Jood

Murata

et al. 2018

Advanced Energy Materials

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This review discusses the longstanding efforts to develop advanced thermoelectrics through a multidisciplinary approach by combining condensed matter physics, nanotechnology, solid‐state chemistry, electrical engineering, mechanical engineering, and metrology. The phonon dynamics of skutterudites, clathrates, tetrahedrites, and layered LaOBiSSe are investigated through inelastic neutron scattering, allowing insights into their low lattice thermal conductivity due to rattling in a cage as well as under planar coordination. The electrical resistivity, Seebeck coefficient, and Hall coefficient of Bi‐nanowires are successfully measured with a home‐made system, demonstrating a size effect in thermoelectric and galvanomagnetic phenomena. For PbTe‐based bulk thermoelectrics, an exceptionally high figure of merit ZT (≈1.8 at 800 K) is achieved through nanostructuring. Moreover, correspondingly high conversion efficiency (≈11% for a temperature difference of 590 K) is demonstrated in nanostructured PbTe‐based modules. Sulfides (tetrahedrite, colusite, and CdI2‐type layered systems) and arsenides (LnFeAsO and BaZn2As2) are developed as environmentally friendly and emerging thermoelectric materials, respectively. The output power and efficiency of modules with novel materials, including nanostructured PbTe, Zn4Sb3, and clathrates, are measured with the highly accurate self‐made system. Future opportunities and challenges for the widespread use of thermoelectric waste heat recovery and energy harvesting are also discussed.

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Recent progress in magnesium-based thermoelectric materials

Abstract: We review the current status of low-cost magnesium-based thermoelectric materials in relation to other materials.

Cited by 75 publications

References 120 publications

High-Performance Thermoelectrics from Cellular Nanostructured Sb2Si2Te6

High-Performance Thermoelectrics from Cellular Nanostructured Sb2Si2Te6

Low-Toxic, Earth-Abundant Nanostructured Materials for Thermoelectric Applications

An Integrated Approach to Thermoelectrics: Combining Phonon Dynamics, Nanoengineering, Novel Materials Development, Module Fabrication, and Metrology

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