High-performance magnesium-based thermoelectric materials: Progress and challenges

Zhou, Zhan; Han, Guang; Lu, Xu; Wang, Guoyu; Zhou, Xiaoyuan

doi:10.1016/j.jma.2022.05.021

Cited by 37 publications

(33 citation statements)

References 171 publications

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“…As revealed in Figure 5d, the κ L for the samples with x = 0.2 and 0.4 reaches lower values compared to that of Cu 5 FeS 4 sample, which is ascribed to their higher‐density twin boundaries. Ultimately, a maximum zT ( zT = S 2 σT /κ tot ) [ 52,53 ] value of 0.90 at 768 K is obtained in the x = 0.4 sample, which is 34% higher than the pristine Cu 5 FeS 4 sample (Figure 5e). This excellent zT compares very favorably to that of all the Cu 5 FeS 4 ‐based materials previously reported in the literature (Figure 5f, Table S7, Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

Formation Mechanism and High Thermoelectric Performance of Cu₅₊₃_xFe_1‐_xS₄ Icosahedral Nanoparticles with Distinctive Core‐Shell Structures

Zheng

Yang

Wang

et al. 2022

Advanced Energy Materials

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Multiply twinned particles (MTPs) demonstrate great potential in the fields of catalysis, [1,2] high-strength alloys, [3] and thermoelectric conversion, [4] due to their unique catalytic, mechanical, and thermal/ electrical transport properties, respectively, which are induced by engineered facets, internal strain, and/or high-density twin boundaries. [5][6][7][8][9][10] Specifically, in terms of thermoelectric properties, twin boundaries are expected to have a minor influence on the carrier mobility ascribed to ordered atomic arrangement; by constructing high-density twin boundaries, phonon scattering would be enhanced effectively, providing a way in reducing the lattice thermal conductivity. [4,11,12] A notable example of MTPs is an icosahedral nanoparticle, which possesses fivefold twins, exposed low-surface energy planes, and irregular strain distribution. [13][14][15][16] Such unique characteristics open up a new route to the regulation and improvement of catalytic and thermoelectric properties. [4,17] Nevertheless, the precise regulation of icosahedral morphology is rather challenging. [18] In this context, much attention has been paid to understanding the formation mechanism of icosahedral nanoparticles, [19][20][21][22] given its importance to modulating the morphological characteristics and exploiting new material systems that can form into such morphology.Great success has been achieved in the synthesis of cubicstructured metal (e.g., Pt, Ag, Au, Cu) icosahedral nanoparticles based on well-developed chemical solution methods. [16,17] Accordingly, two mechanisms for icosahedron growth were explored and put forward: one is the successive growth from a tetrahedral unit via continuous twinning, [19,23] while the other is that particle agglomerates first have fivefold twins formed in the central regions and then gradually grow and develop into an icosahedron. [19,24] The latter process is commonly accompanied by a series of dynamic processes, including diffusion, coalescence, oriented attachment, and Ostwald ripening. [25,26] Importantly, considering that the dihedral angle between two adjacent {111} twin planes is 70.53° rather than 72°, [27] strain energy would be Multiply twinned icosahedrons possess a diversity of unique functionalities well-suited to various applications, such as thermoelectric conversion. Regarding chalcogenide icosahedron, an unconventional yet promising thermoelectric candidate, disclosing its growth mechanism is rather challenging. This study uncovers the formation mechanism of thermoelectric Cu 5+3x Fe 1-x S 4 (0 ≤ x ≤ 0.4) core-shell nano-icosahedrons, which is distinct from that of wellknown metal icosahedrons. Electron microscopy and molecular dynamics simulations reveal that the evolution into icosahedrons, stemming from the fivefold twin formation in the center of Cu 5 FeS 4 particle aggregates, is accompanied by the gradual formation of Fe-rich orthorhombic-structured core and Cu-rich cubic-structured shell, which provides a peculiar stress relaxation mechanism. Further ident...

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Section: Resultsmentioning

confidence: 99%

Formation Mechanism and High Thermoelectric Performance of Cu₅₊₃_xFe_1‐_xS₄ Icosahedral Nanoparticles with Distinctive Core‐Shell Structures

Zheng

Yang

Wang

et al. 2022

Advanced Energy Materials

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“…Many recent reviews have thoroughly summarized the recent developments of TE materials whose charge carriers are electrons/holes and found out these materials are mainly metallic alloys, metal oxides, metal chalcogenides, and some semiconductors, including Bi-Te alloys, skutterudites compounds, tetrahedrites compounds, Half-Heusler (HH) compounds, and other oxides. [31][32][33] As a large group of TE materials, metal oxides have attracted many research interests. [34][35][36][37] Although the crystal structure of the oxides are different from each other, many oxides can function well as TE materials thanks to their high stability at high temperature and low cost.…”

Section: Te Materials With Electrons/holes As Charge Carriersmentioning

confidence: 99%

Wearable Thermoelectric Generators: Materials, Structures, Fabrications, and Applications

Liu

Lin

et al. 2023

Physica Rapid Research Ltrs

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Wearable thermoelectric generators are solid‐state devices that produce electric energy by harvesting thermal energy from human body or environments. They normally work at relatively mild temperatures that are suitable for human, being light, compact, deformable to the 3D surface, safe to human and environment, comfortable, durable, and cost‐effective. As the potential power suppliers for wearable or mobile microelectronic systems, they have attracted considerable attention. Herein, a critical overview and review of the state‐of‐the‐art wearable thermoelectric generators are presented, covering their operational principles, functional and structural materials, device structures, fabrication processes, and potential applications. Also theoretical aspects of their working mechanisms are included and the scientific and practical challenges are discussed.

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“…Current researches on thermoelectrics have stimulated growing interest to access quasi-2D semiconductors due to their intrinsically low thermal conductivity resulting from the weak interactions between atomic thin layers. Many quasi-2D compounds exhibit intrinsic κ L below 2.0 W m −1 K −1 at 300 K (a general criteria of ultralow κ L ), [8] and have been found to be promising TE materials, such as (Sb, Bi) 2 (Se, Te) 3 , [9][10][11] Sn(S, Se), [12][13][14] Mg 3 (Sb, Bi) 2 , [15][16][17] and Cr 2 Ge 2 Te 6 . [18] Nevertheless, almost all of them have relatively low µ.…”

Section: Introductionmentioning

confidence: 99%

Symmetry‐Guaranteed High Carrier Mobility in Quasi‐2D Thermoelectric Semiconductors

et al. 2023

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Quasi‐2D semiconductors have garnered immense research interest for next‐generation electronics and thermoelectrics due to their unique structural, mechanical, and transport properties. However, most quasi‐2D semiconductors experimentally synthesized so far have relatively low carrier mobility, preventing the achievement of exceptional power output. To break through this obstacle, a route is proposed based on the crystal symmetry arguments to facilitate the charge transport of quasi‐2D semiconductors, in which the horizontal mirror symmetry is found to vanish the electron–phonon coupling strength mediated by phonons with purely out‐of‐plane vibrational vectors. This is demonstrated in ZrBeSi‐type quasi‐2D systems, where the representative sample Ba1.01AgSb shows a high room‐temperature hole mobility of 344 cm2 V−1 S−1, a record value among quasi‐2D polycrystalline thermoelectrics. Accompanied by intrinsically low thermal conductivity, an excellent p‐type zT of ≈1.3 is reached at 1012 K, which is the highest value in ZrBeSi‐type compounds. This work uncovers the relation between electron–phonon coupling and crystal symmetry in quasi‐2D systems, which broadens the horizon to develop high mobility semiconductors for electronic and energy conversion applications.

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High-performance magnesium-based thermoelectric materials: Progress and challenges

Cited by 37 publications

References 171 publications

Formation Mechanism and High Thermoelectric Performance of Cu₅₊₃_xFe_1‐_xS₄ Icosahedral Nanoparticles with Distinctive Core‐Shell Structures

Formation Mechanism and High Thermoelectric Performance of Cu₅₊₃_xFe_1‐_xS₄ Icosahedral Nanoparticles with Distinctive Core‐Shell Structures

Wearable Thermoelectric Generators: Materials, Structures, Fabrications, and Applications

Symmetry‐Guaranteed High Carrier Mobility in Quasi‐2D Thermoelectric Semiconductors

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High-performance magnesium-based thermoelectric materials: Progress and challenges

Cited by 37 publications

References 171 publications

Formation Mechanism and High Thermoelectric Performance of Cu5+3xFe1‐xS4 Icosahedral Nanoparticles with Distinctive Core‐Shell Structures

Formation Mechanism and High Thermoelectric Performance of Cu5+3xFe1‐xS4 Icosahedral Nanoparticles with Distinctive Core‐Shell Structures

Wearable Thermoelectric Generators: Materials, Structures, Fabrications, and Applications

Symmetry‐Guaranteed High Carrier Mobility in Quasi‐2D Thermoelectric Semiconductors

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Product

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Formation Mechanism and High Thermoelectric Performance of Cu₅₊₃_xFe_1‐_xS₄ Icosahedral Nanoparticles with Distinctive Core‐Shell Structures

Formation Mechanism and High Thermoelectric Performance of Cu₅₊₃_xFe_1‐_xS₄ Icosahedral Nanoparticles with Distinctive Core‐Shell Structures