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Advancements in Thermoelectric Materials for Energy Conversion

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Energy Materials".

Deadline for manuscript submissions: 20 July 2025 | Viewed by 1305

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Guest Editor
Department of Structural Mechanics and Hydraulic Engineering, University of Granada, 18071 Granada, Spain
Interests: phase change materials (PCM); energy; thermodynamics; experimental; computational simulation; finite element formulation
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Special Issue Information

Dear Colleagues,

Energy plays a fundamental role in society, enhancing the quality of life and driving economic, technological, and social developments. Nowadays, ensuring a sustainable future requires a transition toward renewable energy sources. In this context, small-scale energy production from residual sources, such as mechanical vibrations or heat, appears highly promising and requires further research.

This special issue focuses on Thermoelectric Energy Generation (TEG) based on the Seebeck effect to produce energy from residual heat sources. The main objective is to cover new developments in TEG technologies, including experimental, theoretical, and computational aspects.

We welcome your valuable contributions to this field of research. Your participation will not only drive the advancement of science and technology but will also significantly contribute to the pursuit of sustainable solutions for the energy challenges of our time.

Dr. Roberto Palma
Guest Editor

Manuscript Submission Information

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Keywords

  • thermoelectric materials
  • phase change materials
  • seebeck effect
  • materials for energy conversion
  • heat
  • electricity
  • experimental
  • computational

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Published Papers (1 paper)

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Research

8 pages, 2121 KiB  
Article
Large Improvements in the Thermoelectric Properties of SnSe by Fast Cooling
by Andrew Golabek, Nikhil K. Barua, Ehsan Niknam, Luke T. Menezes and Holger Kleinke
Materials 2025, 18(2), 358; https://doi.org/10.3390/ma18020358 - 14 Jan 2025
Viewed by 927
Abstract
As reported during the last five years, SnSe is one of the leading thermoelectric (TE) materials with a very low lattice thermal conductivity. However, its elements are not as heavy as those of classical thermoelectric materials like PbTe or Bi2Te3 [...] Read more.
As reported during the last five years, SnSe is one of the leading thermoelectric (TE) materials with a very low lattice thermal conductivity. However, its elements are not as heavy as those of classical thermoelectric materials like PbTe or Bi2Te3. Its outstanding TE properties were revealed after repeated purification steps to minimize the amount of oxygen contamination, followed by spark plasma sintering. Recently, we showed that hot-pressing—once optimized—can yield comparable or even better TE performance using the examples of Na- and Cu- as well as Na- and Ag-co-doped SnSe. However, long-term stability remains a challenge during cycling between low and high temperatures. Here, we investigated whether the cooling procedure has a significant impact on the thermoelectric properties of SnSe. We compared cooling of the melt with a 1:1 ratio of Sn:Se from 1273 K down to room temperature in air with quenching in water. As typical for undoped SnSe, both materials were extrinsic p-type semiconductors due to Sn defects. The air-quenched sample exhibited higher thermal conductivity, lower electrical conductivity, and higher Seebeck coefficient, all consistent with a smaller number of defects and thus a smaller number of charge carriers due to the slower cooling procedure. This resulted in a comparatively low peak figure-of-merit value zT of 0.61 at 823 K for the air-quenched sample, compared to the substantially higher peak zT of 1.58 at 813 K for the water-quenched sample. Full article
(This article belongs to the Special Issue Advancements in Thermoelectric Materials for Energy Conversion)
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