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arXiv · 2202.09273

Structural study and evaluation of thermoelectric properties of single-phase isocubanite (CuFe2S3) synthesized via an ultra-fast efficient microwave radiation technique

Tristan Barbier·Bhuvanesh Srinivasan·David Berthebaud·Volker Eyert·Raymond Frésard·Rodolphe Macaigne·Sylvain Marinel·Oleg I. Lebedev·Emmanuel Guilmeau·Antoine Maignan
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Abstract

The current state-of-the-art thermoelectric materials are generally composed of expensive, scarce, and toxic elements. In this respect, copper-based sulfide compounds have emerged as viable alternatives. Herein, we report for the first time the successful synthesis of single-phase cubic isocubanite CuFe2S3 using mechanical-alloying combined with microwave-assisted synthesis. The isocubanite phase synthesized via this ultra-fast out-of-equilibrium process exhibits a maximum thermoelectric figure of merit, zTmax ~ 0.14 at 673 K. Besides the thermoelectric properties, insights about the structure of isocubanite, based on the refinement of X-ray diffraction data and first principles calculations, are also investigated in detail. It confirms that the Cu-Fe cations in synthetic isocubanite overwhelmingly occupy the 4d sites of the cubic structure in an inherently disordered fashion.

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Tristan Barbier, Bhuvanesh Srinivasan, David Berthebaud, Volker Eyert, Raymond Frésard, Rodolphe Macaigne, Sylvain Marinel, Oleg I. Lebedev, Emmanuel Guilmeau, Antoine Maignan. 2022-02-18. Structural study and evaluation of thermoelectric properties of single-phase isocubanite (CuFe2S3) synthesized via an ultra-fast efficient microwave radiation technique. https://doi.org/10.1039/d1se01007g

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