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Crystals
Special Issues
Advanced Materials and Composites for Thermoelectric Applications
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Advanced Materials and Composites for Thermoelectric Applications

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 July 2023) | Viewed by 5760

Special Issue Editors

Dr. Yu Liu

E-Mail Website
Guest Editor
School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, Anhui, China
Interests: nanotechnology; inorganic chemistry; materials science; chalcogenides; solution processing; thermoelectricity; energy conversion
Dr. Khak Ho Lim

E-Mail Website
Guest Editor
Institute of Zhejiang University - Quzhou, 78 Jiuhua Boulevard North, Quzhou 324000, Zhejiang, China
Interests: bottom-up synthesis; nanostructured materials; band engineering; thermoelectric polymers; hybrid nanocomposites
Dr. Yu Zhang

E-Mail Website
Guest Editor
Department of Materials Science and Engineering, College of Earth and Mineral Science, Pennsylvania State University, State College, PA 16801, USA
Interests: thermal energy conversion; thermoelectric generator (TEG); thermoelectric material; crystalline nanomaterials

Special Issue Information

Dear Colleagues,

Huge amounts of energy are wasted in the form of heat due to inefficiencies in industrial and domestic processes and in transportation. To recover such low-quality thermal energy is extremely appealing both economically and environmentally. The progression towards renewable energy sources and carbon neutrality demands a continual development in advanced materials science and efficient energy utilization. A thermoelectric generator (TEG) that functions on the Seebeck/Peltier effect can reversibly convert heat into electricity and can therefore be developed for use as a power generator or spot cooling device. In addition to the strict energy and carbon emission demand, the blooming development in 5G-based technology, e.g., the Internet of Things (IoT), will require TEG technology to power autonomous sensors and devices and spot cooling on the ever-transmitting 5G electronics and transmitters. Therefore, TEG is a promising material in this context, and its future development requires advancement in material synthesis and innovation in device fabrication.

Therefore, in order to better promote the development of the application of thermoelectric materials in the field of energy conversion, a Special Issue on “Advanced Materials and Composites for Thermoelectric Applications” has been launched in Crystals. This Special Issue is open for contributions dealing with the synthesis, characterization, surface chemistry, surface modification, or applications of advanced-structured materials. Potential topics include, but are not limited to, inorganic materials, organic conducting polymers, composites, polymer composites, bulk materials, flexible thin films for energy harvesting applications, thermoelectric device fabrications, etc.

We welcome researchers to submit their interesting original works, perspectives, and reviews for this Special Issue. Manuscripts in the form of full papers, communications, perspectives, and reviews are all welcome.

Dr. Yu Liu
Dr. Khak Ho Lim
Dr. Yu Zhang
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Crystals is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • thermoelectric materials
  • chalcogenides
  • solution processing
  • solid-state
  • composite
  • flexible thin films
  • conducting polymer
  • thermoelectric property
  • thermoelectric devices

Published Papers (3 papers)

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Research

15 pages, 5450 KiB  
Article
First-Principles Investigation of Structural, Thermoelectric, and Optical Properties of Half-Heusler Compound ScRhTe under Varied Pressure
by Junhong Wei, Yongliang Guo and Guangtao Wang
Crystals 2022, 12(10), 1472; https://0-doi-org.brum.beds.ac.uk/10.3390/cryst12101472 - 17 Oct 2022
Cited by 3 | Viewed by 1251
Abstract
We thoroughly investigated the electronic structure and various properties of the half-Heusler compound ScRhTe using density functional theory calculations. The electronic structure shows that ScRhTe is a narrow-band-gap semiconductor. Owing to its characteristic conduction-band structure, ScRhTe has a higher Seebeck coefficient and a [...] Read more.
We thoroughly investigated the electronic structure and various properties of the half-Heusler compound ScRhTe using density functional theory calculations. The electronic structure shows that ScRhTe is a narrow-band-gap semiconductor. Owing to its characteristic conduction-band structure, ScRhTe has a higher Seebeck coefficient and a higher power factor for n-type doping than for p-type doping, with the maximum value of −493 µV K−1 appearing at 900 K. The optimal carrier concentration is approximately 5 × 1019 cm−3–1 × 1020 cm−3. In addition, ZTe is estimated as 0.95 at a doping level of approximately 1019 cm−3. Under pressure, the band structure changes from a direct to an indirect band gap, and the band gap increases as the pressure changes from tensile to compressive. The thermoelectric properties of ScRhTe improve under compressive pressure, whereas the optical properties improve greatly under tensile pressure. By varying the pressure, the electronic structure and various properties of ScRhTe can be effectively adjusted, which signifies that ScRhTe has the potential to become an important optoelectronic or thermoelectric material. Full article
(This article belongs to the Special Issue Advanced Materials and Composites for Thermoelectric Applications)
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14 pages, 33435 KiB  
Article
Development of a Computational Fluid Dynamics (CFD) Numerical Approach of Thermoelectric Module for Power Generation
by Mohammed A. Qasim, Vladimir I. Velkin and Sergey E. Shcheklein
Crystals 2022, 12(6), 828; https://0-doi-org.brum.beds.ac.uk/10.3390/cryst12060828 - 10 Jun 2022
Cited by 5 | Viewed by 1798
Abstract
The recent innovations in thermoelectric generating materials have led to exceptional technologies that generate power from excess and lost heat. These technologies have proven to be of significant environmental and economic importance, especially with global warming issues and escalating fuel prices. This study [...] Read more.
The recent innovations in thermoelectric generating materials have led to exceptional technologies that generate power from excess and lost heat. These technologies have proven to be of significant environmental and economic importance, especially with global warming issues and escalating fuel prices. This study developed a computational fluid dynamics (CFD) model for a thermoelectric generator (TEG) consisting of five TEG modules embedded between two aluminum blocks. The upper block collects solar energy and heats the hot side of the modules. The lower block has an internal M-shaped water channel to cool the cold side of the modules. The model predictions were compared with the authors’ previously published experimental results to assess its validity and reliability. A parametric study was conducted to investigate the effects of various solar collector block thicknesses and different water flow velocities on the TEG-generated voltage and efficiency. The results show excellent agreement between the model predictions and the experimental data. Moreover, the parametric study revealed a slight inverse relationship between the thickness of the solar-collecting mass, the efficiency of the system, and an increase in the heat flux. However, the relationship was proportional to the velocity of water flow. Full article
(This article belongs to the Special Issue Advanced Materials and Composites for Thermoelectric Applications)
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10 pages, 2761 KiB  
Article
Preparation and Characterization of B4C-HfB2 Composites as Material for High-Temperature Thermocouples
by Bing Feng, Hans-Peter Martin and Alexander Michaelis
Crystals 2022, 12(5), 621; https://0-doi-org.brum.beds.ac.uk/10.3390/cryst12050621 - 27 Apr 2022
Cited by 2 | Viewed by 1799
Abstract
Boron carbide shows high thermoelectric power. Therefore, it is an interesting material for thermoelectric applications. In the past, there were already successful uses of boron carbide as a thermocouple material together with graphite. However, more reliable, cost-efficient, and long-term stable solutions are required [...] Read more.
Boron carbide shows high thermoelectric power. Therefore, it is an interesting material for thermoelectric applications. In the past, there were already successful uses of boron carbide as a thermocouple material together with graphite. However, more reliable, cost-efficient, and long-term stable solutions are required for practical benefit. Boron carbide and hafnium boride composites were prepared by pressureless sintering of B4C and HfC powder mixtures. The effect of HfC addition on the sinterability of boron carbide was studied. Highly densified ceramic with a relative density of 95.4% was obtained at a sintering temperature of 2250 °C. The composition and the microstructure of the dense composites are characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDX). In addition, the correlation between the composition, Seebeck coefficient, and the electrical conductivity was investigated. The Seebeck coefficient of the composite is decreased and the electrical conductivity is increased with the increasing addition of HfC, and a change in conduction behavior from semiconducting to a metallic mechanism is observed. Functional thermocouples based on the prepared composites were tested and showed potential for temperature measurement application. Full article
(This article belongs to the Special Issue Advanced Materials and Composites for Thermoelectric Applications)
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