Advances in Thermoelectric Materials 2023-2024

A special issue of Crystals (ISSN 2073-4352). This special issue belongs to the section "Materials for Energy Applications".

Deadline for manuscript submissions: closed (31 December 2023) | Viewed by 8545

Special Issue Editors


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Guest Editor
Leibniz Institute for Solid State and Materials Research, IFW, Helmholtzstraße 20, 01069 Dresden, Germany
Interests: nanocomposites; thermoelectric; thermal conductivity; power factor; figure-of-merit

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Guest Editor
Shenzhen Key Laboratory of Advanced Thin Films and Applications, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
Interests: materials science; bulk alloys; nanocomposites; thermoelectric materials

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Guest Editor
Leibniz Institute for Solid State and Materials Research Dresden (IFW Dresden), 01069 Dresden, Germany
Interests: ceramics; ferroelectric materials; thermoelectric materials; nanocomposite

Special Issue Information

Dear Colleagues,

This Issue of Crystals features cutting-edge reviews and original articles on thermoelectric materials. Thermoelectric systems, which can transform waste heat into electricity, are progressively being realized as a possible solution for the recovery of the large-scale waste heat in environmental and commercial perspectives. It is crucial to develop thermoelectric (TE) systems with high energy conversion efficiency, which is quantified by having a high figure of merit (ZT) that can be expressed as ZT= PF.T/κ, where PF (=σS2, here S is thermopower and σ is electrical conductivity) is the power factor, and σ is the thermal conductivity and T is the temperature, respectively. However, it is a foremost challenge to optimize intuitive conflicting. Taking into account the structural, chemical, and compositional complexity of thermoelectric materials, the scope to advance this research direction would value greatly from a large scientific community of chemists, physicists, and materials scientists. This Special Issue on “Advances in Thermoelectric materials” collects exciting papers on new material designs, thermoelectric devices, new thermoelectric transport theory, etc. This Issue features articles on the development of next-generation thermoelectric materials and insight into how materials chemistry and condensed material physics have been exploited to modulate electronic and phonon transport, mechanical, and thermal stability, and energy conversion efficiency via high-throughput experiments and theoretical approaches.

The topics of the Special Issue will include, but are not limited to, the following:

Thermoelectric material and devices;

Te-free thermoelectricity;

Nanocomposite-based thermoelectricity;

Organic‒Inorganic-based thermoelectric material and devices;

Thermoelectric flexible and transport properties;

Microstructurally induced electrical and thermal transport trends in thermoelectricity;

Synthesis-to-mechanism-driven thermoelectricity;

Two-dimensional thermoelectric material’s growth and properties.

Dr. Bushra Jabar
Dr. Adil Mansoor
Dr. Jamil Ur Rahman
Guest Editors

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Keywords

  • thermoelectric materials
  • thermal conductivity
  • crystalline structures
  • two-dimensional structures
  • microstructures
  • figure-of-merit

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Published Papers (2 papers)

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Research

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12 pages, 2872 KiB  
Article
Surface Modification of Bi2Te3 Nanoplates Deposited with Tin, Palladium, and Tin/Palladium Using Electroless Deposition
by Kaito Kohashi, Yutaro Okano, Daiki Tanisawa, Keisuke Kaneko, Shugo Miyake and Masayuki Takashiri
Crystals 2024, 14(2), 132; https://doi.org/10.3390/cryst14020132 - 28 Jan 2024
Cited by 3 | Viewed by 1873
Abstract
Surface-modified nanoplate-shaped thermoelectric materials can achieve good thermoelectric performance. Herein, single-crystalline Bi2Te3 nanoplates with regular hexagonal shapes were prepared via solvothermal techniques. Surface modification was performed to deposit different metals onto the nanoplates using electroless deposition. Nanoparticle-shaped tin (Sn) and [...] Read more.
Surface-modified nanoplate-shaped thermoelectric materials can achieve good thermoelectric performance. Herein, single-crystalline Bi2Te3 nanoplates with regular hexagonal shapes were prepared via solvothermal techniques. Surface modification was performed to deposit different metals onto the nanoplates using electroless deposition. Nanoparticle-shaped tin (Sn) and layer-shaped palladium (Pd) formed on the Bi2Te3 nanoplates via electroless deposition. For the sequential deposition of Sn and Pd, the surface morphology was mostly the same as that of the Sn-Bi2Te3 nanoplates. To assess the thermoelectric properties of the nanoplates as closely as possible, they were compressed into thin bulk shapes at 300 K. The Sn-Bi2Te3 and Sn/Pd-Bi2Te3 nanoplates exhibited the lowest lattice thermal conductivity of 1.1 W/(m·K), indicating that nanoparticle-shaped Sn facilitated the scattering of phonons. By contrast, the Pd-Bi2Te3 nanoplates exhibited the highest electrical conductivity. Thus, the highest power factor (15 μW/(m∙K2)) and dimensionless ZT (32 × 10−3) were obtained for the Pd-Bi2Te3 nanoplates. These thermoelectric properties were not as high as those of the sintered Bi2Te3 samples; however, this study revealed the effect of different metal depositions on Bi2Te3 nanoplates for improving thermoelectric performance. These findings offer venues for improving thermoelectric performance by sintering nanoplates deposited with appropriate metals. Full article
(This article belongs to the Special Issue Advances in Thermoelectric Materials 2023-2024)
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Review

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27 pages, 3870 KiB  
Review
Development of Thermoelectric Half-Heusler Alloys over the Past 25 Years
by Gerda Rogl and Peter Franz Rogl
Crystals 2023, 13(7), 1152; https://doi.org/10.3390/cryst13071152 - 24 Jul 2023
Cited by 34 | Viewed by 5609
Abstract
Half-Heusler alloys are among the most promising thermoelectric materials. In the present review, thermoelectric properties (at 300 K and 800 K) of more than 1100 compositions from more than 220 publications between 1998 and 2023 were collected and evaluated. The dependence of the [...] Read more.
Half-Heusler alloys are among the most promising thermoelectric materials. In the present review, thermoelectric properties (at 300 K and 800 K) of more than 1100 compositions from more than 220 publications between 1998 and 2023 were collected and evaluated. The dependence of the peak figure of merit, ZTmax, of p- and n-type half-Heusler alloys on the publishing year and the peak temperature is displayed in several figures. Furthermore, plots of ZT vs. the electrical resistivity, the Seebeck coefficient and the thermal conductivity at 300 K and 800 K are shown and discussed. Especially thermal conductivity vs. power factor leads to a good overview of ZT. For both p- and n-type individually separated into systems, ZTs and peak ZTs in dependence on the composition are displayed and discussed. This overview can help to find the ideal half-Heusler alloy for practical use. Full article
(This article belongs to the Special Issue Advances in Thermoelectric Materials 2023-2024)
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