Inorganic Thermoelectric Materials: Advances and Applications

A special issue of Inorganics (ISSN 2304-6740). This special issue belongs to the section "Inorganic Materials".

Deadline for manuscript submissions: 30 April 2026 | Viewed by 649

Special Issue Editor


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Guest Editor
Department of Chemistry, Yanbian University, Yanji 133000, China
Interests: energy materials; energy device; energy storage; energy conversion; thermoelectrics; battery; electronic structure theory

Special Issue Information

Dear Colleagues,

Inorganic thermoelectric materials have emerged as a pivotal research focus, offering a sustainable pathway for direct conversion between heat and electricity. These materials—such as bismuth telluride-based compounds, lead chalcogenides, and skutterudites—hold significant potential for applications in waste heat recovery, solid-state cooling, and power generation. However, despite recent advancements, further improvements in their performance and scalability are essential to meet global energy demands and reduce greenhouse gas emissions.

The thermoelectric efficiency of these materials is governed by their dimensionless figure of merit (ZT), which depends on the interplay between the Seebeck coefficient, electrical conductivity, and thermal conductivity. Achieving high ZT values requires innovative strategies to decouple these inter-related properties, such as nanostructuring, band engineering, doping, and defect control. Furthermore, understanding the fundamental mechanisms behind electron–phonon interactions, carrier transport, and thermal management is critical for optimizing material performance.

This Special Issue, titled “Inorganic Thermoelectric Materials: Advances and Applications”, seeks to showcase cutting-edge research that pushes the boundaries of thermoelectric science and technology. We invite contributions spanning experimental and theoretical approaches, including the following:

  • Novel synthesis and processing techniques for inorganic thermoelectrics;
  • Advanced characterization of thermal and electronic transport properties;
  • Theoretical modeling and computational design of high-performance materials;
  • Strategies for enhancing ZT through nanostructuring, alloying, and composite design;
  • Scalable fabrication and device integration for real-world applications.

Both original research articles and comprehensive reviews are welcome. By bringing together diverse perspectives, this Special Issue aims to foster collaboration and accelerate progress in this dynamic and impactful field.

We look forward to your valuable contributions.

Dr. Chengjin An
Guest Editor

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Keywords

  • inorganic thermoelectrics
  • energy conversion
  • waste-heat recovery
  • figure of merit (ZT)
  • Seebeck coefficient
  • thermal conductivity
  • electrical conductivity

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Published Papers (2 papers)

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Research

15 pages, 959 KB  
Article
Study on the Control of Electrical and Thermal Transport Properties of Indium Oxide Thermoelectric Materials for Aiye Processing Equipment by Cerium Doping
by Jie Zhang, Bo Feng, Zhengxiang Yang, Sichen Zhang, Junjie Zhang, Jiao Lei, Yaoyang Zhang, Xiaoqiong Zuo, Zhiwen Yang, Tongqiang Xiong, Wenzheng Li, Tong Tang, Suoluoyan Yang and Ruolin Ruan
Inorganics 2025, 13(12), 412; https://doi.org/10.3390/inorganics13120412 - 16 Dec 2025
Abstract
To address the low energy conversion efficiency and weak mechanical strength of In2O3 thermoelectric materials for Aiye Processing Equipment, this study systematically investigated the regulatory effects and mechanisms of Ce doping on In2O3’s thermoelectric and mechanical [...] Read more.
To address the low energy conversion efficiency and weak mechanical strength of In2O3 thermoelectric materials for Aiye Processing Equipment, this study systematically investigated the regulatory effects and mechanisms of Ce doping on In2O3’s thermoelectric and mechanical properties via experiments. In2O3 samples with varying Ce contents were prepared, and property-microstructure correlations were analyzed through electrical/thermal transport tests, Vickers hardness measurements, and crystal structure characterization. Results show Ce doping synergistically optimizes In2O3 properties through multiple mechanisms. For thermoelectric performance, Ce4+ regulates carrier concentration and mobility, enhancing electrical conductivity and power factor. Meanwhile, lattice distortion from Ce-In atomic size differences strengthens phonon scattering, reducing lattice and total thermal conductivity. These effects boost the maximum ZT from 0.055 (pure In2O3) to 0.328 at 973 K obtained by x = 0.0065, improving energy conversion efficiency significantly. For mechanical properties, Ce doping enhances Vickers hardness and plastic deformation resistance via solid solution strengthening (lattice distortion hinders dislocations), microstructure densification (reducing vacancies/pores), Ce-O bond strengthening, and defect pinning. This study confirms Ce doping as an effective strategy for simultaneous optimization of In2O3’s thermoelectric and mechanical properties, providing experimental/theoretical support for oxide thermoelectric material development and valuable references for their medium-low temperature energy recovery applications. Full article
(This article belongs to the Special Issue Inorganic Thermoelectric Materials: Advances and Applications)
15 pages, 4603 KB  
Article
The Impact Mechanism of Y Doping on the Thermoelectric Properties and Financial Costs of Oxide for Application of Thermal Power Generation
by Tongqiang Xiong, Jie Zhang, Bo Feng, Bowei Yang, Min Gao, Shilong Pan, Wenji Lv, Zhiwen Yang, Zikang Hu, Tong Tang, Wenzheng Li, Suoluoyan Yang, Haitao Zhang and Yonghong Chen
Inorganics 2025, 13(12), 386; https://doi.org/10.3390/inorganics13120386 - 25 Nov 2025
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Abstract
This paper delves into the impact of Y doping on In2O3 thermoelectric materials. Yttrium doping significantly modifies the properties of In2O3, with far-reaching implications for its thermoelectric performance and mechanical characteristics. In the electrical domain, Y [...] Read more.
This paper delves into the impact of Y doping on In2O3 thermoelectric materials. Yttrium doping significantly modifies the properties of In2O3, with far-reaching implications for its thermoelectric performance and mechanical characteristics. In the electrical domain, Y3+ substitution for In3+ optimizes carrier concentration and mobility. The alteration of the electronic band structure leads to a balanced improvement in the Seebeck coefficient and electrical conductivity, boosting the power factor. Despite initial lattice distortion-induced mobility changes, carrier screening at suitable doping levels counteracts this, enhancing overall electrical conductivity. Regarding thermal conductivity, multiple factors act synergistically. Lattice distortion, along with the generation of point defects, dislocations, nanostructuring, and modulated electron–phonon interactions, jointly reduce heat transfer. This reduction is vital for maintaining a substantial temperature gradient, a prerequisite for efficient thermoelectric conversion. The observed increase in ZT (the thermoelectric device figure of merit) with the highest value from ~0.055 to ~0.275. Full article
(This article belongs to the Special Issue Inorganic Thermoelectric Materials: Advances and Applications)
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