Significant enhancement in thermoelectric performance of Mg3Sb2 from bulk to two-dimensional mono layer

Huang, Shan; Wang, Ziyu; Xiong, Rui; Yu, Hongyu; Shi, Jing

doi:10.1016/j.nanoen.2019.05.028

Cited by 111 publications

(48 citation statements)

References 51 publications

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“…Another distinct feature is that the six electron pockets are nearly spherical while the hole pocket shows an obvious anisotropy along the k x ‐ k y plane and k z direction. This anisotropy in VBM is well embodied in the calculated effective masses along the two directions [ 71 , 133 , 134 ]. For example, in the calculation by Zhang et al, m xx ∗ ( m yy ∗ ) was estimated to be 1.15 m e and m zz ∗ is 0.15 m e [ 71 ].…”

Section: Chemical Bonding and Structurementioning

confidence: 91%

High-Performance Mg ₃ Sb _{2-
x} Bi _x Thermoelectrics: Progress and Perspective

Zhao

et al. 2020

Research

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Since the first successful implementation of n-type doping, low-cost Mg3Sb2-xBix alloys have been rapidly developed as excellent thermoelectric materials in recent years. An average figure of merit zT above unity over the temperature range 300–700 K makes this new system become a promising alternative to the commercially used n-type Bi2Te3-xSex alloys for either refrigeration or low-grade heat power generation near room temperature. In this review, with the structure-property-application relationship as the mainline, we first discuss how the crystallographic, electronic, and phononic structures lay the foundation of the high thermoelectric performance. Then, optimization strategies, including the physical aspects of band engineering with Sb/Bi alloying and carrier scattering mechanism with grain boundary modification and the chemical aspects of Mg defects and aliovalent doping, are extensively reviewed. Mainstream directions targeting the improvement of zT near room temperature are outlined. Finally, device applications and related engineering issues are discussed. We hope this review could help to promote the understanding and future developments of low-cost Mg3Sb2-xBix alloys for practical thermoelectric applications.

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Section: Chemical Bonding and Structurementioning

confidence: 91%

High-Performance Mg ₃ Sb _{2-
x} Bi _x Thermoelectrics: Progress and Perspective

Zhao

et al. 2020

Research

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“…The thermal diffusivity D was tested with a laser flash principle using a Netzsch LFA 457 system. The thermal conductivity: κ = ρ•D•C p , where the heat capacity C p and density ρ were from the test [53,54]. A mini Jet Pencil Gun Torch with 1300 °C flame was used to test the fire-retardant property of the 3D printed structures with pure SI, SI/r-BNs, and SI/a-BNs.…”

Section: Preparation Of Si Photocurable Resin and Boron Nitridementioning

confidence: 99%

3D Printing of Nacre-Inspired Structures with Exceptional Mechanical and Flame-Retardant Properties

Wang

et al. 2022

Research

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Flame-retardant and thermal management structures have attracted great attention due to the requirement of high-temperature exposure in industrial, aerospace, and thermal power fields, but the development of protective fire-retardant structures with complex shapes to fit arbitrary surfaces is still challenging. Herein, we reported a rotation-blade casting-assisted 3D printing process to fabricate nacre-inspired structures with exceptional mechanical and flame-retardant properties, and the related fundamental mechanisms are studied. 3-(Trimethoxysilyl)propyl methacrylate (TMSPMA) modified boron nitride nanoplatelets (BNs) were aligned by rotation-blade casting during the 3D printing process to build the “brick and mortar” architecture. The 3D printed structures are more lightweight, while having higher fracture toughness than the natural nacre, which is attributed to the crack deflection, aligned BN (a-BNs) bridging, and pull-outs reinforced structures by the covalent bonding between TMSPMA grafted a-BNs and polymer matrix. Thermal conductivity is enhanced by 25.5 times compared with pure polymer and 5.8 times of anisotropy due to the interconnection of a-BNs. 3D printed heat-exchange structures with vertically aligned BNs in complex shapes were demonstrated for efficient thermal control of high-power light-emitting diodes. 3D printed helmet and armor with a-BNs show exceptional mechanical and fire-retardant properties, demonstrating integrated mechanical and thermal protection.

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“…The ZT values is increased by 5-12 in case of p-type as compared to the bulk materials 154 (see Figure 6a-d). Huang et al 155 investigated the bulk and monolayer material of n-type Mg 3 Sb 2 which is also shows the high performance of TE materials when it is reducing at monolayer. Apart from this, doping in polycrystalline Mg 3 Sb 2 materials enhancing the TE ZT values (see Figure 6e).…”

Section: Nanostructuresmentioning

confidence: 99%

Dimensionality effects in high‐performance thermoelectric materials: Computational and experimental progress in energy harvesting applications

Singh

Ahuja

2021

WIREs Comput Mol Sci

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Thermoelectric (TE) materials can be used in the conversion of heat to electricity and vice versa, which can enhance the efficiency of the fuel, in addition to supplying solid alternative energy in several applications in accumulating waste heat and, as a result, help to find new energy sources. Considering the current environment as well as the energy crisis, the TE modules are a need of the future. The present review focuses on the new strategies and approaches to achieve high-performance TE materials including materials improvement, structures, and geometry improvement and their applications. Controlling the carrier concentration and the band structures of materials is an effective way to optimize the electrical transport properties, while engineered nanostructures and engineering defects can immensely decrease the thermal conductivity and significantly improved the power factor. The present review gives a better understanding of how the theory is affecting the TE field.

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Significant enhancement in thermoelectric performance of Mg3Sb2 from bulk to two-dimensional mono layer

Cited by 111 publications

References 51 publications

High-Performance Mg ₃ Sb _{2-
x} Bi _x Thermoelectrics: Progress and Perspective

High-Performance Mg ₃ Sb _{2-
x} Bi _x Thermoelectrics: Progress and Perspective

3D Printing of Nacre-Inspired Structures with Exceptional Mechanical and Flame-Retardant Properties

Dimensionality effects in high‐performance thermoelectric materials: Computational and experimental progress in energy harvesting applications

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Significant enhancement in thermoelectric performance of Mg3Sb2 from bulk to two-dimensional mono layer

Cited by 111 publications

References 51 publications

High-Performance Mg 3 Sb 2- x Bi x Thermoelectrics: Progress and Perspective

High-Performance Mg 3 Sb 2- x Bi x Thermoelectrics: Progress and Perspective

3D Printing of Nacre-Inspired Structures with Exceptional Mechanical and Flame-Retardant Properties

Dimensionality effects in high‐performance thermoelectric materials: Computational and experimental progress in energy harvesting applications

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High-Performance Mg ₃ Sb _{2-
x} Bi _x Thermoelectrics: Progress and Perspective

High-Performance Mg ₃ Sb _{2-
x} Bi _x Thermoelectrics: Progress and Perspective