Attempts to further enhance ZT in skutterudites via nano-composites

Rogl, Gerda; Grytsiv, A.; Failamani, Fainan; Hochenhofer, M.; Bauer, E.; Rogl, P.

doi:10.1016/j.jallcom.2016.10.114

Cited by 33 publications

(34 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The electron is not easy to be scattered because of the size of the nanoscale second-phase is much larger than the mean free path of the electron, which has little effect on the electrical properties. The preparation of CoSb 3 -based nanocomposites by in-situ generation [78,[167][168][169][170][171][172][173][174][175][176][177] or mechanical addition of nanoinclusions [178][179][180][181][182][183][184][185][186][187][188][189][190][191][192][193] is a common method to introduce the second phase. In x Ce y Co 4 Sb 12 nanocomposites containing in-situ formed InSb nanophases (10-80 nm) were prepared by melt quenching, annealing, and spark plasma sintering [78], as shown in Figs.…”

Section: Low Dimensionalmentioning

confidence: 99%

A review of CoSb3-based skutterudite thermoelectric materials

et al. 2020

View full text Add to dashboard Cite

The binary skutterudite CoSb3 is a narrow bandgap semiconductor thermoelectric (TE) material with a relatively flat band structure and excellent electrical performance. However, thermal conductivity is very high because of the covalent bond between Co and Sb, resulting in a very low ZT value. Therefore, researchers have been trying to reduce its thermal conductivity by the different optimization methods. In addition, the synergistic optimization of the electrical and thermal transport parameters is also a key to improve the ZT value of CoSb3 material because the electrical and thermal transport parameters of TE materials are closely related to each other by the band structure and scattering mechanism. This review summarizes the main research progress in recent years to reduce the thermal conductivity of CoSb3-based materials at atomic-molecular scale and nano-mesoscopic scale. We also provide a simple summary of achievements made in recent studies on the non-equilibrium preparation technologies of CoSb3-based materials and synergistic optimization of the electrical and thermal transport parameters. In addition, the research progress of CoSb3-based TE devices in recent years is also briefly discussed.

show abstract

Section: Low Dimensionalmentioning

confidence: 99%

A review of CoSb3-based skutterudite thermoelectric materials

et al. 2020

View full text Add to dashboard Cite

show abstract

“…They crystallize in a cubic cell belonging to the Im space group (Pearson symbol cI32, З isotypic crystal: CoAs ), having three atomic sites: 8c (¼, ¼, ¼), 24g 3 (0, y, z) and 2a position (0, 0, 0) occupied by M, X and R, respectively. The X icosahedral cage built around the 2a site is of the utmost 12 importance, due to its ability to host atoms such as alkaline-earths or lanthanides, responsible for lowering the phononic part of thermal conductivity and for determining the n-or p-conduction regime of the resulting material. Electrons contributed by the filler ion, in fact, tune the electronic count of the skutterudite; previous studies indicated the 16 p/n crossover in Sm (Fe Ni ) Sb to be located at x ~ 0.63.…”

Section: Introductionmentioning

confidence: 99%

Effect of Different Processing Routes on the Power Factor of the Filled Skutterudite Sm (Fe Ni ) Sb (x = 0.50-0.80; y = 0.12-0.53)

Artini¹,

Latronico²,

Carlini³

et al. 2019

ES Mater.Manuf.

View full text Add to dashboard Cite

“…[1][2][3][4][5][6] Another option is to decrease the thermal conductivity, which has been explored by nano-structuring [7][8][9] and the synthesis of filled cage-like structures, which lead to large decreases in thermal conductivity by influencing the lattice contribution. [10,11] Leading TE materials include the lead chalcogenides, filled skutterudites, and nano-structured alloys among others. [9][10][11][12][13][14][15] Lead chalcogenides are among the most studied TE materials because of their high ZT values ranging from 1.3 to 2.2.…”

Section: Introductionmentioning

confidence: 99%

Giant Pressure‐Induced Enhancement of Seebeck Coefficient and Thermoelectric Efficiency in SnTe

et al. 2017

View full text Add to dashboard Cite

The thermoelectric properties of polycrystalline SnTe have been measured up to 4.5 GPa at 330 K. SnTe shows an enormous enhancement in Seebeck coefficient, greater than 200 % after 3 GPa, which correlates to a known pressure-induced structural phase transition that is observed through simultaneous in situ X-ray diffraction measurement. Electrical resistance and relative changes to the thermal conductivity were also measured, enabling the determination of relative changes in the dimensionless figure of merit (ZT), which increases dramatically after 3 GPa, reaching 350 % of the lowest pressure ZT value. The results demonstrate a fundamental relationship between structure and thermoelectric behaviours and suggest that pressure is an effective tool to control them.

show abstract

Attempts to further enhance ZT in skutterudites via nano-composites

Cited by 33 publications

References 33 publications

A review of CoSb3-based skutterudite thermoelectric materials

A review of CoSb3-based skutterudite thermoelectric materials

Effect of Different Processing Routes on the Power Factor of the Filled Skutterudite Sm (Fe Ni ) Sb (x = 0.50-0.80; y = 0.12-0.53)

Giant Pressure‐Induced Enhancement of Seebeck Coefficient and Thermoelectric Efficiency in SnTe

Contact Info

Product

Resources

About