Uniform dispersion of SiC in Yb-filled skutterudite nanocomposites with high thermoelectric and mechanical performance

Zhou, Zhenxing; Li, Jianlin; Fan, Yuchi; Zhang, Qihao; Lu, Xihong; Fan, Shengjie; Kikuchi, Keiko; Nomura, Naoyuki; Kawasaki, Akira; Wang, Bijia

doi:10.1016/j.scriptamat.2018.11.015

Cited by 49 publications

(40 citation statements)

References 39 publications

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“…(A) Miscellaneous Skutterudites with its lowest κ t value at divergent temperature range. (B) Miscellaneous optimization techniques for the enhancement of ZT values of high performance skutterudites …”

Section: High Performance Inorganic Te Materialsmentioning

confidence: 99%

Inorganic thermoelectric materials: A review

et al. 2020

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Summary Thermoelectric generator, which converts heat into electrical energy, has great potential to power portable devices. Nevertheless, the efficiency of a thermoelectric generator suffers due to inefficient thermoelectric material performance. In the last two decades, the performance of inorganic thermoelectric materials has been significantly advanced through rigorous efforts and novel techniques. In this review, major issues and recent advancements that are associated with the efficiency of inorganic thermoelectric materials are encapsulated. In addition, miscellaneous optimization strategies, such as band engineering, energy filtering, modulation doping, and low dimensional materials to improve the performance of inorganic thermoelectric materials are reported. The methodological reviews and analyses showed that all these techniques have significantly enhanced the Seebeck coefficient, electrical conductivity, and reduced the thermal conductivity, consequently, improved ZT value to 2.42, 2.6, and 1.85 for near‐room, medium, and high temperature inorganic thermoelectric material, respectively. Moreover, this review also focuses on the performance of silicon nanowires and their common fabrication techniques, which have the potential for thermoelectric power generation. Finally, the key outcomes along with future directions from this review are discussed at the end of this article.

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Section: High Performance Inorganic Te Materialsmentioning

confidence: 99%

Inorganic thermoelectric materials: A review

et al. 2020

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“…In addition to atom‐filling, nanoprecipitation is another effective strategy to further enhance ZT . So far, various second phases including oxides, antimonides, silicides, metals, borides,7b,8a tellurides, nitrides, carbon‐type materials, or magnetic materials have been introduced into skutterudites. On one hand, nanosized second phases with lattice strain could strengthen phonon‐scattering and lower the thermal transport properties.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, some suitable precipitates such as GaSb could even build up potential barrier at the phase boundaries, which could filter the low‐energy carriers and increase the density of states (DOS) near the Fermi level, finally resulting in the enhancement of the Seebeck coefficient and then the power factor 9b. Experimentally, the design of synthesis parameters including composition, temperature, cooling rate is crucial to obtain nanostructures with desirable sizes, elemental distribution, homogeneity, coherency, etc 9b,e,10b. It is worth noting that silicide nanoparticles possess excellent mechanical properties, such as Fe 3 Si, SiC .…”

Section: Introductionmentioning

confidence: 99%

“…Experimentally, the design of synthesis parameters including composition, temperature, cooling rate is crucial to obtain nanostructures with desirable sizes, elemental distribution, homogeneity, coherency, etc 9b,e,10b. It is worth noting that silicide nanoparticles possess excellent mechanical properties, such as Fe 3 Si, SiC . The introduction of these nanoparticles can also effectively improve the mechanical properties of thermoelectric materials, which is highly desirable from the perspective of practical applications.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced Thermoelectric and Mechanical Properties in Yb_0.3Co₄Sb₁₂ with In Situ Formed CoSi Nanoprecipitates

Qin

Cai

et al. 2019

Advanced Energy Materials

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Filled Skutterudites are one group of the most promising thermoelectric materials in real power generation applications. Herein, homogeneously dispersed multiscale CoSi nanostructures are successfully embedded into grains of the classic skutterudite system, Yb0.3Co4Sb12, by the in situ precipitation method. Such nanoprecipitates contribute much to the synergistic enhancement of thermoelectric and mechanical properties. On one hand, by the fine deployment of multiscale CoSi nanoparticles, the lattice thermal conductivity is significantly depressed almost to the theoretical limit because of the disrupted propagation of the heat‐carrying phonons at phase boundaries. On the other hand, low‐energy electrons are effectively screened due to the energy filtering effect by the interfacial potential barrier between the CoSi nanoprecipitate and the matrix, resulting in an enhanced power factor. Taken together, an enhanced peak ZT value of ≈1.5 at 873 K for the Yb0.3Co4Sb12/0.05CoSi composite is obtained with a high average ZT ≈0.95 between 300 and 873 K through decoupling the electrical and thermal transport parameters. Moreover, such a microstructure with multiscale CoSi nanoparticles shows significantly improved mechanical properties owing to particle hardening, making it more competitive for practical applications.

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“…Various interfacial effects such as carrier filtering and boundary phonon scattering to explain zT enhancement have been proposed [6][7][8][9]. Introducing nanoparticles into the skutterudite matrix is one of the simplest routes to form materials with multiple phases, whereby a reduced κ lat is obtained while maintaining the power factor of the skutterudite matrix [10,11]. However, a well-controlled fabrication process for uniform dispersion of nanoparticles in the skutterudite matrix is always required to secure the enhancement of zT.…”

Section: Introductionmentioning

confidence: 99%

Phase Formation Behavior and Thermoelectric Transport Properties of P-Type YbxFe3CoSb12 Prepared by Melt Spinning and Spark Plasma Sintering

2019

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Formation of multiple phases is considered an effective approach for enhancing the performance of thermoelectric materials since it can reduce the thermal conductivity and improve the power factor. Herein, we report the in-situ generation of a submicron-scale (~500 nm) heterograin structure in p-type Yb-filled (Fe,Co)4Sb12 skutterudites during the melt spinning process. Mixed grains of YbxFe3−yCo1+ySb12 and YbzFe3+yCo1−ySb12 were formed in melt spun ribbons due to uneven distribution of cations. By the formation of interfaces between two different grains, the power factor was enhanced due to the formation of an energy barrier for carrier transport, and simultaneously the lattice thermal conductivity was reduced due to the intensified boundary phonon scattering. A high thermoelectric figure of merit zT of 0.66 was obtained at 700 K.

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Uniform dispersion of SiC in Yb-filled skutterudite nanocomposites with high thermoelectric and mechanical performance

Cited by 49 publications

References 39 publications

Inorganic thermoelectric materials: A review

Inorganic thermoelectric materials: A review

Enhanced Thermoelectric and Mechanical Properties in Yb_0.3Co₄Sb₁₂ with In Situ Formed CoSi Nanoprecipitates

Phase Formation Behavior and Thermoelectric Transport Properties of P-Type YbxFe3CoSb12 Prepared by Melt Spinning and Spark Plasma Sintering

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Uniform dispersion of SiC in Yb-filled skutterudite nanocomposites with high thermoelectric and mechanical performance

Cited by 49 publications

References 39 publications

Inorganic thermoelectric materials: A review

Inorganic thermoelectric materials: A review

Enhanced Thermoelectric and Mechanical Properties in Yb0.3Co4Sb12 with In Situ Formed CoSi Nanoprecipitates

Phase Formation Behavior and Thermoelectric Transport Properties of P-Type YbxFe3CoSb12 Prepared by Melt Spinning and Spark Plasma Sintering

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Product

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Enhanced Thermoelectric and Mechanical Properties in Yb_0.3Co₄Sb₁₂ with In Situ Formed CoSi Nanoprecipitates