The inclusion of ceramic carbides dispersion in In and Yb filled CoSb3 and their effect on the thermoelectric performance

Popescu, Bogdan; Galatanu, Magdalena; Enculescu, Monica; Galaţanu, A.

doi:10.1016/j.jallcom.2021.162400

Cited by 13 publications

(11 citation statements)

References 39 publications

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“…Other nanoinclusions such as SiC, ,,,,,,− InSb, ,,,− MXenes, , BN, and TiB 2 are used in thermoelectric composites.…”

Section: Classification Of Nanoinclusionsmentioning

confidence: 99%

“…SiC nanoinclusions reduce κ and enhance α, but their σ depends on the matrix and the concentration of the inclusions. Adding SiC nanoinclusions, a semiconductor with a bandgap of 3.25 eV, the σ of the composite may increase , or decrease , depending on the matrix carrier density and the concentration of SiC. Generally, SiC increases the density of the defects such as antisite and point defects at interfaces, enhancing the carrier density .…”

Section: Classification Of Nanoinclusionsmentioning

confidence: 99%

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Insights into the Classification of Nanoinclusions of Composites for Thermoelectric Applications

Theja

Karthikeyan

Assi

et al. 2022

ACS Appl. Electron. Mater.

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Thermoelectric composites are known for their enhanced power conversion performance via interfacial engineering and intensified mechanical, structural, and thermal properties. However, the selection of these nanoinclusions, for example, their type, size effect, volume fraction, distribution uniformity, coherency with host, carrier dynamics, and physical stability, plays a crucial role in modifying the host material thermoelectric properties. In this Review, we classify the nanoinclusions into five types: carbon allotropes, secondary thermoelectric phases, metallic materials, insulating oxides, and others. On the basis of the classification, we discuss the mechanisms involved in improving the ZT of nanocomposites involving reduction of thermal conductivity (κ) by phonon scattering, improving the Seebeck coefficient (α) via energy filtering effect and the electrical conductivity (σ) by carrier injection or carrier channeling. Comprehensibly, we validate that adding nanoinclusions with high electrical and low thermal conductivity as compared to the matrix material is the best way to optimize the interlocked thermoelectric parameters. Thus, collective doping and nanoinclusions in thermoelectric materials is the best possible solution to achieve a higher power conversion efficiency equivalent to other renewable energy technologies.

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“…Other nanoinclusions such as SiC, ,,,,,,− InSb, ,,,− MXenes, , BN, and TiB 2 are used in thermoelectric composites.…”

Section: Classification Of Nanoinclusionsmentioning

confidence: 99%

Section: Classification Of Nanoinclusionsmentioning

confidence: 99%

Insights into the Classification of Nanoinclusions of Composites for Thermoelectric Applications

Theja

Karthikeyan

Assi

et al. 2022

ACS Appl. Electron. Mater.

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“…25 Typically, the rattler atoms in the single filler occupied compounds 28 trigger the scattering of phonons with similar vibrational frequency, whereas multiatom filled rattlers scatter the phonons with various ranges of frequencies. 29 Being an element with heavy mass and smaller ionic radii as well as high filling fraction (∼0.4), Yb has been explored as an efficient filler to suppress the lattice thermal conductivity via rattling behavior. Ryll et al 30 studied the effect of different synthesis procedures on the transport phenomenon in Yb-containing Co 4 Sb 12 .…”

Section: Introductionmentioning

confidence: 99%

“…Further, the stability is also coupled with the oxidation state of the filler atom, Y max = ( r ion / r cage ) – 0.086 n – 0.24, where n denotes the oxidation number of filler and r is the radius . Typically, the rattler atoms in the single filler occupied compounds trigger the scattering of phonons with similar vibrational frequency, whereas multiatom filled rattlers scatter the phonons with various ranges of frequencies . Being an element with heavy mass and smaller ionic radii as well as high filling fraction (∼0.4), Yb has been explored as an efficient filler to suppress the lattice thermal conductivity via rattling behavior.…”

Section: Introductionmentioning

confidence: 99%

Enhancement in Thermoelectric Performance in Ti-doped Yb_0.4Co₄Sb₁₂ Skutterudites via Carrier Optimization and Phonon Anharmonicity

Dadhich,

Saminathan,

Muthiah

et al. 2023

ACS Appl. Mater. Interfaces

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Yb 0.4 Co 4 Sb 12 , being a well-studied system, has shown notably high thermoelectric performance due to the Yb filler atom-driven large concentration of charge carriers and lower value of thermal conductivity. In this work, the thermoelectric performance of Yb z Co 4−x Ti x Sb 12 (where z = 0, x = 0 and z = 0.4, x = 0, 0.04, and 0.08) upon Ti doping prepared by the meltquenched-annealing followed by spark plasma sintering (SPS) has been studied in the temperature range of 300−700 K. Addition of Yb and doping of donor Ti at the Co site simultaneously increase the electrical conductivity to 1453.5 S/cm at 300 K, which ultimately boosts the power factor as high as ∼4.3 mW/(m•K 2 ) at 675 K in Yb 0.4 Co 3.96 Ti 0.04 Sb 12 . Adversely, a significant reduction in thermal conductivity is obtained from ∼7.69 W/(m•K) (Co 4 Sb 12 ) to ∼3.50 W/(m•K) (Yb 0.4 Co 3.96 Ti 0.04 Sb 12 ) at ∼300 K. As a result, the maximum zT is achieved as ∼0.85 at 623 K with high hardness of 584 H V for the composition of Yb 0.4 Co 3.96 Ti 0.04 Sb 12 , which demonstrates it to be an efficient material suitable for intermediate temperature thermoelectric applications.

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“…21,22 Experimentally, as a cage compound, the introduction of lled atoms can decrease the skutterudite's lattice thermal conductivity and further improve the ZT value. [23][24][25][26][27][28] Besides, the electronic structures of lled skutterudites can also be affected by them, generally resulting in high carrier concentrations. 22,[28][29][30] Therefore, the study of the EPI effect on the lattice thermal conductivity of lled skutterudites is necessary.…”

Section: Introductionmentioning

confidence: 99%

Significant reduction in lattice thermal conductivity in a p-type filled skutterudite due to strong electron–phonon interactions

Zhu

Yang

2022

J. Mater. Chem. A

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The inclusion of ceramic carbides dispersion in In and Yb filled CoSb3 and their effect on the thermoelectric performance

Cited by 13 publications

References 39 publications

Insights into the Classification of Nanoinclusions of Composites for Thermoelectric Applications

Insights into the Classification of Nanoinclusions of Composites for Thermoelectric Applications

Enhancement in Thermoelectric Performance in Ti-doped Yb_0.4Co₄Sb₁₂ Skutterudites via Carrier Optimization and Phonon Anharmonicity

Significant reduction in lattice thermal conductivity in a p-type filled skutterudite due to strong electron–phonon interactions

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The inclusion of ceramic carbides dispersion in In and Yb filled CoSb3 and their effect on the thermoelectric performance

Cited by 13 publications

References 39 publications

Insights into the Classification of Nanoinclusions of Composites for Thermoelectric Applications

Insights into the Classification of Nanoinclusions of Composites for Thermoelectric Applications

Enhancement in Thermoelectric Performance in Ti-doped Yb0.4Co4Sb12 Skutterudites via Carrier Optimization and Phonon Anharmonicity

Significant reduction in lattice thermal conductivity in a p-type filled skutterudite due to strong electron–phonon interactions

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Enhancement in Thermoelectric Performance in Ti-doped Yb_0.4Co₄Sb₁₂ Skutterudites via Carrier Optimization and Phonon Anharmonicity