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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Role of iron in synthetic tetrahedrites revisited
Daria I. Nasonova,Igor A. Presniakov,A. V. Sobolev,Valeriy Yu. Verchenko,Valeriy Yu. Verchenko,Alexander A. Tsirlin,Alexander A. Tsirlin,Zheng Wei,Evgeny V. Dikarev,Andrei V. Shevelkov +9 more
TL;DR: In this paper, the valence state of iron in Cu12−xFexSb4S13 tetrahedrites has been revisited by the combination of the crystallographic results, Mossbauer spectroscopy, and magnetization measurements.
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TL;DR: In this paper, the authors synthesized earth-abundant, cost-effective, and nontoxic n-type ternary sulfide Cu1.6Bi4.8S8, which exhibits an intrinsically ultralow Iolat of � 0.71-0.44 W/m·K in the temperature range of 296-736 K.
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