Thermoelectric properties of Co4Sb12with Bi2Te3nanoinclusions

Ghosh, Sanyukta; Bisht, Anuj; Karati, Anirudha; Rogl, Gerda; Rogl, P.; Murty, B.S.; Suwas, Satyam; Mallik, Ramesh Chandra

doi:10.1088/1361-648x/aaa5ea

Cited by 17 publications

(18 citation statements)

References 49 publications

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“…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%

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A review of CoSb3-based skutterudite thermoelectric materials

et al. 2020

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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.

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Section: Low Dimensionalmentioning

confidence: 99%

“…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. 10(a [189], MoS 2 [190], etc.) in the CoSb 3 -based material, as shown in Figs.…”

Section: Low Dimensionalmentioning

confidence: 99%

A review of CoSb3-based skutterudite thermoelectric materials

et al. 2020

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“…This is not the case if the quadratic term in α is considered. If this point and the contribution of the chemical potentials are considered in J Q,i (formula (16) in [3]), then in the EMT formula only κ e,i and α i occur. Starting with J i and J Q,i and correcting these inaccuracies contained in Equation (A2), then it follows for the EMT formula…”

Section: Institutional Review Board Statement: Not Applicablementioning

confidence: 99%

“…As a theoretical support, the EMT formalism, which has been widely used to explain the transport properties of composites, including ceramics [13][14][15] and thermoelectrics [16][17][18], will be implemented.…”

Section: Introductionmentioning

confidence: 99%

Composites to Produce a Material with Zero Absolute Thermopower S = 0 or a Thermopower Switch between S = 0 and S ≠ 0

Sonntag

Lenoir

2021

Materials

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From the theory of two-phase composites it is concluded that in the concentration dependence of the Seebeck coefficient S a kink can occur precisely at S=0 absolute if the two phases have different kinds of carriers, electrons and holes, and if the phase grains are spherical without preferred orientations and arranged in a symmetrical fashion. This feature, indeed found to be realized in amorphous Cr1−xSix thin films deposited by ion beam sputtering from Cr-Si alloy targets, can be applied to make reference standards for S=0 at room temperature and even at higher temperatures. Additionally, it may be used to design a thermopower switch between S=0 and S≠0. It is also concluded that the structure realized in any alloy during solidification does not only depend on the diffusion mobility of the atoms and on the existence of a (relative) minimum in the Gibbs’ free energy. It depends also on the fact whether this structure is compatible with the demand that (spatial) continuity of the entropy and energy flux densities and their gradients is saved during the solidification process.

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“…In recent years, researchers have been focusing on the impacts of Bi 2 Te 3 -based alloy nanoparticles in improving the properties of TE materials. − Jabar et al reported that introducing the isostructural Bi 2 Te 3 nanoparticles in the Bi 2 Te 2.7 Se 0.3 matrix was a good approach to optimize the TE transport parameters of the matrix through the construction of the coherent interfaces and the establishment of the interface potential barriers. Ghosh et al reported that the carrier concentration was increased because the Bi 2 Te 3 nanoparticles contributed electrons to the Co 4 Sb 12 matrix, and the power factor was improved. In addition, solid solutions of Bi 2 Te 3 and Sb 2 Te 3 are usually used to obtain p-type Bi 2 Te 3 -based materials (Bi x Sb 2– x Te 3 ).…”

Section: Introductionmentioning

confidence: 99%

Synergistic Optimization of Electrical–Thermal–Mechanical Properties of the In-Filled CoSb₃ Material by Introducing Bi_0.5Sb_1.5Te₃ Nanoparticles

Zhu

Liu

Tong

et al. 2021

ACS Appl. Mater. Interfaces

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How to realize the synergistic optimization of electrical–thermal–mechanical properties of thermoelectric materials is a key challenge. Using the Bi0.5Sb1.5Te3 nanoparticle as a mixed agent provides an effective way to address this challenge. Here, Bi0.5Sb1.5Te3/In0.25Co4Sb12 nanocomposites with different contents of Bi0.5Sb1.5Te3 nanoparticles were successfully prepared by ultrasonic dispersion combined with spark plasma sintering. Phase and microstructure characterization presented that Te nanoparticles were precipitated from Bi0.5Sb1.5Te3 during the SPS sintering process. Transport measurement results showed that the electrical conductivity was increased due to the increased carrier concentration induced by the charge transfer between Te nanoparticles and the matrix. The Seebeck coefficient was also increased due to the selected electron scattering and increased scattering factor. The lattice thermal conductivity was dramatically suppressed because of the enhanced phonon scattering induced by the Bi0.5Sb1.5Te3 nanoparticles and in situ-precipitated Te nanoparticles and increased dislocations. As a result, a higher average ZT value of 1 was obtained in the range of 300–700 K by the decoupling of the electrical and thermal transport properties for the nanocomposite with 0.1 wt % of Bi0.5Sb1.5Te3 nanometer suspension. Furthermore, the flexural strength, fracture toughness, and hardness of the nanocomposites were also improved significantly. This work demonstrates that using the Bi0.5Sb1.5Te3 nanoparticle as a mixed agent can realize the synergistic optimization of electrical–thermal–mechanical properties of the In-filled CoSb3 thermoelectric material.

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Thermoelectric properties of Co₄Sb₁₂with Bi₂Te₃nanoinclusions

Cited by 17 publications

References 49 publications

A review of CoSb3-based skutterudite thermoelectric materials

A review of CoSb3-based skutterudite thermoelectric materials

Composites to Produce a Material with Zero Absolute Thermopower S = 0 or a Thermopower Switch between S = 0 and S ≠ 0

Synergistic Optimization of Electrical–Thermal–Mechanical Properties of the In-Filled CoSb₃ Material by Introducing Bi_0.5Sb_1.5Te₃ Nanoparticles

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Thermoelectric properties of Co4Sb12with Bi2Te3nanoinclusions

Cited by 17 publications

References 49 publications

A review of CoSb3-based skutterudite thermoelectric materials

A review of CoSb3-based skutterudite thermoelectric materials

Composites to Produce a Material with Zero Absolute Thermopower S = 0 or a Thermopower Switch between S = 0 and S ≠ 0

Synergistic Optimization of Electrical–Thermal–Mechanical Properties of the In-Filled CoSb3 Material by Introducing Bi0.5Sb1.5Te3 Nanoparticles

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Product

Resources

About

Thermoelectric properties of Co₄Sb₁₂with Bi₂Te₃nanoinclusions

Synergistic Optimization of Electrical–Thermal–Mechanical Properties of the In-Filled CoSb₃ Material by Introducing Bi_0.5Sb_1.5Te₃ Nanoparticles