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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Ultralow lattice thermal conductivity at room temperature in Cu4TiSe4.
Biplab Koley,Achintya Lakshan,Parul R. Raghuvanshi,Charanpreet Singh,Amrita Bhattacharya,Partha P. Jana +5 more
TL;DR: In this article, the lattice ultra-low thermal conductivity of Cu 4 TiSe 4 was investigated and the main contribution to the unusually low thermal conductivities is connected with the atomic lattice and its dynamics, which can be attributed to the localized modes of Cu which partially hybridized with the Se atoms.
Journal ArticleDOI
Intrinsically Low Lattice Thermal Conductivity and Anisotropic Thermoelectric Performance in In‐doped GeSb2Te4 Single Crystals
Peng Chen,Hongli Wu,Bin Zhang,Zizhen Zhou,Sikang Zheng,Lu Dai,Yufeng Huo,De Peng Zhang,Yanci Yan,Kunling Peng,Guangtao Han,Xu Lu,Xiaoyuan Zhou,Guoyu Wang +13 more
TL;DR: In this article , the authors investigated the anisotropic thermoelectric properties of GeSb2Te4 single crystals and obtained a peak zT of 1 at 673 K and an average zT value of 0.68 within 323-773 K.
Journal ArticleDOI
The impact of manganese substitution on the structure and properties of tetrahedrite
TL;DR: In this article, the crystal structure of the tetrahedrites Cu12mnSb4S13 has been studied by powder neutron diffraction between room temperature and 773 K. At all temperatures investigated, manganese exclusively occupied tetrahedral sites, while the trigonal-planar sites contained only copper.
Journal ArticleDOI
Effect of Composition on Thermoelectric Properties of As-Cast Materials: The Cu 12− x Co x Sb 4 S 13− y Se y Case
Tiago Kalil Cortinhas Alves,Tiago Kalil Cortinhas Alves,Gonçalo Domingues,Elsa B. Lopes,António Pereira Gonçalves +4 more
TL;DR: In this paper, powder x-ray diffraction and scanning electron microscopy observations were combined with energy-dispersive spectroscopy to identify and characterize the phases formed in this process.
Journal ArticleDOI
Effects of Se Doping on Thermoelectric Properties of Tetrahedrite Cu 12 Sb 4 S 13−z Se z
TL;DR: In this article, a high power and low thermal conductivity of tetrahedrite Cu12Sb4S13−zSez (z = 0.1−0.4) compounds were synthesized using mechanical alloying and hot pressing.
References
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Journal ArticleDOI
Generalized Gradient Approximation Made Simple
TL;DR: A simple derivation of a simple GGA is presented, in which all parameters (other than those in LSD) are fundamental constants, and only general features of the detailed construction underlying the Perdew-Wang 1991 (PW91) GGA are invoked.
Journal ArticleDOI
From ultrasoft pseudopotentials to the projector augmented-wave method
Georg Kresse,Daniel P. Joubert +1 more
TL;DR: In this paper, the formal relationship between US Vanderbilt-type pseudopotentials and Blochl's projector augmented wave (PAW) method is derived and the Hamilton operator, the forces, and the stress tensor are derived for this modified PAW functional.
Journal ArticleDOI
Ab initio molecular dynamics for liquid metals.
Georg Kresse,Jürgen Hafner +1 more
TL;DR: In this paper, the authors present an ab initio quantum-mechanical molecular-dynamics calculations based on the calculation of the electronic ground state and of the Hellmann-Feynman forces in the local density approximation.
Journal ArticleDOI
Thin-film thermoelectric devices with high room-temperature figures of merit
TL;DR: Th thin-film thermoelectric materials are reported that demonstrate a significant enhancement in ZT at 300 K, compared to state-of-the-art bulk Bi2Te3 alloys, and the combination of performance, power density and speed achieved in these materials will lead to diverse technological applications.
Journal ArticleDOI
High-Thermoelectric Performance of Nanostructured Bismuth Antimony Telluride Bulk Alloys
Bed Poudel,Qing Hao,Yi Ma,Yucheng Lan,Austin J. Minnich,Bo Yu,Xiao Yan,Dezhi Wang,Andrew Muto,Daryoosh Vashaee,Xiaoyuan Chen,Jun-Ming Liu,Mildred S. Dresselhaus,Gang Chen,Zhifeng Ren +14 more
TL;DR: Electrical transport measurements, coupled with microstructure studies and modeling, show that the ZT improvement is the result of low thermal conductivity caused by the increased phonon scattering by grain boundaries and defects, which makes these materials useful for cooling and power generation.