High Performance Thermoelectricity in Earth-Abundant Compounds Based on Natural Mineral Tetrahedrites
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TLDR
In this article, the authors report dimensionless thermoelectric properties of tetrahedrites, the most widespread sulfosalts on Earth, and further show that the natural mineral itself can be used directly as an inexpensive source of energy.Abstract:
Thermoelectric materials can convert waste heat into electricity, potentially improving the effi ciency of energy usage in both industry and everyday life. Unfortunately, known good thermoelectric materials often are comprised of elements that are in low abundance and require careful doping and complex synthesis procedures. Here, we report dimensionless thermoelectric fi gure of merit near unity in compounds of the form Cu 12 − x M x Sb 4 S 13 , where M is a transition metal such as Zn or Fe, for wide ranges of x . The compounds investigated here span the range of compositions of the natural mineral family of tetrahedrites, the most widespread sulfosalts on Earth, and we further show that the natural mineral itself can be used directly as an inexpensive source thermoelectric material. Thermoelectrics comprised of earth-abundant elements will pave the way to many new, low cost thermoelectric energy generation opportunities.read more
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Elastic Softening in the Tetrahedrite Cu12Sb4S13
Takashi Suzuki,Hiroki Goto,Isao Ishii,Yoshihito Noguchi,Shuhei Kamikawa,Koichiro Suekuni,Hiromi I. Tanaka,Toshiro Takabatake +7 more
TL;DR: In this article, the tetrahedrite Cu 12 Sb 4 S 13 has a cubic structure above 100 k and is paid attention as thermoelectric materials, and a metal-semiconductor phase transition is reported by the electrical resistivity and magnetic susceptibility measurements.
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Effect of Transport Properties on Thermoelectric Generators Design, A review
Abstract: Due to the relatively low efficiency of thermoelectric (TE) generators, they have mostly been used in niche applications where the unique properties of TE generators outweigh their lack of efficiency, or conditions where it is more reasonable to base the optimal design on maximum generated power rather than maximum efficiency. The aim of this work is to investigate how the different fundamental transport properties (Seebeck coefficient, thermal conductivity and electrical resistivity) in materials with equal figure of merit (ZT) impact TE module design and maximum power output. Further, we discuss and review the strategies to enhance material properties and the latest studies on the TE module performance. It is shown, that by increasing the power factor by a factor of 15 and decreasing the thermal conductivity by 13.33 in order to maintain ZT=1, power output is increased by 45%. This effect is stronger in lower module fill factor and thermal resistance of the heat source and heat sink.
Journal ArticleDOI
Solid-Phase Equilibria in the Cu-Sb-S System and Thermodynamic Properties of Copper-Antimony Sulfides
L. F. Mashadiyeva,Parvin R. Mammadli,Dunya M. Babanly,Garay M. Ashirov,Andrei V. Shevelkov,Yusif A. Yusibov +5 more
TL;DR: In this paper, a comprehensive study of solid-phase equilibria in the system Cu-Sb-S and thermodynamic properties of copper antimony sulfides was conducted by the powder x-ray diffraction technique, differential thermal analysis and electromotive forces (EMF) methods.
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Improving thermoelectric performance of indium thiospinel by Se- and Te-substitution
Paweł Wyżga,Paweł Wyżga,Sven Grimm,Valentin Garbe,Esteban-Mauricio Zuniga-Puelles,Esteban-Mauricio Zuniga-Puelles,Cameliu Himcinschi,Igor Veremchuk,Igor Veremchuk,Andreas Leithe-Jasper,Roman Gumeniuk +10 more
TL;DR: In this paper, a structural and thermoelectric study of the polycrystalline Se- and Te-substituted In2.67S4 thiospinels was performed.
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