High temperature thermoelectric properties of Mo3Sb7−xTex for x=1.6 and 1.5

Gascoin, Franck; Rasmussen, Julia; Snyder, G. Jeffrey

doi:10.1016/j.jallcom.2006.03.030

Cited by 45 publications

(71 citation statements)

References 12 publications

(16 reference statements)

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“…16- 18 The term transition metal Zintl phase is another distinction used in the literature to describe transition metal containing compounds that are isostructural to main group metalloid containing Zintl compounds 14- 16 or, in some cases, new transition metal containing structures where the Zintl formulism provides insight into the electronic structure and bonding. [22][23][24][25][26] In a Zintl phase the Zintl anions (or transition metal-Zintl ions) provide the "electron-crystal" electronic structure through the covalently bonded network of complex anions or metalloids. Fig.…”

Section: Zintl Phasesmentioning

confidence: 99%

“…For example, the addition of Te (x = 1.6) into Mo 3 Sb 7−x Te x increases the Seebeck coefficient and decrease the thermal conductivity. The combination of resistivity, Seebeck coefficient and thermal conductivity results in a maximum zT of ∼0.8 at 1050 K. 26 Much efforts are in progress to tune this material further, with attention being focused on modifying the carrier concentration (a.k.a. controlling of the valence-electron-count) and filling the Sb 8 cube voids.…”

Section: Transition Metal Zintl Phasesmentioning

confidence: 99%

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Zintl phases for thermoelectric devices

2007

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By converting waste heat into electricity and improving the efficiency of refrigeration systems, thermoelectric devices could play a significant role in solving today's energy problems. Increasing the thermoelectric efficiency (as measured by the thermoelectric material's figure-of-merit, zT) is critical to the development of this technology. Complex Zintl phases, in particular, make ideal candidates for thermoelectric materials because the necessary "electron-crystal, phonon-glass" properties can be engineered with an understanding of the Zintl chemistry. A recent example is the discovery that Yb 14 MnSb 11 , a transition metal Zintl compound, has twice the zT as the material currently in use at NASA. This perspective outlines a strategy to discover new high zT materials in Zintl phases, and presents results pointing towards the success of this approach.

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Section: Zintl Phasesmentioning

confidence: 99%

Section: Transition Metal Zintl Phasesmentioning

confidence: 99%

Zintl phases for thermoelectric devices

2007

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“…Theoretical calculations showed that partial substitution of Sb by Te elements would effectively shift the Fermi levels and then optimize the TE performance, which was confirmed by the experiments. 18,[22][23][24][25] High zT value of 0.8 at 1050 K was reported, making this material an outstanding candidate for high-temperature TE power generation. 18 However, it is not clear if higher performance would be achieved if the carrier concentration could be further reduced.…”

Section: Introductionmentioning

confidence: 97%

“…18,[22][23][24][25] High zT value of 0.8 at 1050 K was reported, making this material an outstanding candidate for high-temperature TE power generation. 18 However, it is not clear if higher performance would be achieved if the carrier concentration could be further reduced. Attempts to reduce both the carrier concentration and the lattice thermal conductivity by filling with 3-d transition metals has shown to be largely unsuccessful.…”

Section: Introductionmentioning

confidence: 97%

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Optimized thermoelectric properties of Mo3Sb7−xTex with significant phonon scattering by electrons

Xiao-li

Pei

Snyder

et al. 2011

Energy Environ. Sci.

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Heavily doped compounds Mo 3 Sb 7Àx Te x (x ¼ 0, 1.0, 1.4, 1.8) were synthesized by solid state reaction and sintered by spark plasma sintering. Both X-ray diffraction and electron probe microanalysis indicated the maximum solubility of Te was around x ¼ 1.8. The trends in the electrical transport properties can generally be understood using a single parabolic band model, which predicts that the extremely high carrier concentration of Mo 3 Sb 7 ($10 22 cm À3 ) can be reduced to a nearly optimized level ($2 Â 10 21 cm À3 ) for thermoelectric figure of merit (zT) by Te-substitution with x ¼ 1.8. The increased lattice thermal conductivity by Te-doping was found to be due to the decreased Umklapp and electronphonon scattering, according to a Debye model fitting. The thermoelectric figure of merit (zT) monotonously increased with increasing temperature and reached its highest value of about 0.51 at 850 K for the sample with x ¼ 1.8, making these materials competitive with the state-of-the-art thermoelectric SiGe alloys. Evidence of significant electron-phonon scattering is found in the thermal conductivity.

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Metal Pnictides: Structures and Thermoelectric Properties

Assoud

Kleinke

2017

Handbook of Solid State Chemistry

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This chapter provides an overview of the structures and thermoelectric properties of metal pnictides, with focus on the antimonides. In addition, several references are provided in the introduction to refer the reader to the other potential uses of metal pnictides, including applications in hydrogen storage, lithium batteries, photocatalysis, heterogeneous catalysis, lithium‐ion conductors, and superconductivity.We present an encompassing picture of the binary antimonides of interest, group by group, followed by selected ternary antimonides. In addition to the heavily investigated family of filled skutterudites, several other antimonides with highly complex crystal structures exhibit outstanding thermoelectric performance, mostly because of their extraordinarily low thermal conductivity.

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High temperature thermoelectric properties of Mo3Sb7−xTex for x=1.6 and 1.5

Cited by 45 publications

References 12 publications

Zintl phases for thermoelectric devices

Zintl phases for thermoelectric devices

Optimized thermoelectric properties of Mo3Sb7−xTex with significant phonon scattering by electrons

Metal Pnictides: Structures and Thermoelectric Properties

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