Unconventional thermoelectric material and preparation method thereof

Abstract

An unconventional thermoelectric material and a preparation method thereof. The unconventional thermoelectric material has the chemical formula of TiFexRuyCuzSb, where x, y, z are molecular weights of Fe, Ru, and Cu in the chemical formula, 1<x+y+z<2, x and z are not 0. The unconventional thermoelectric material TiFexRuyCuzSb (1<x+y+z<2) exhibits excellent thermoelectric performance, which has a Seebeck coefficient that exceeds 180 μV/K within a certain temperature range, and a figure of merit reaches 1.2 at 875 K. In the temperature range of 14 K to 650 K, the resistivity of TiFexRuyCuzSb presents a strict linear temperature dependence, breaking through the Mott-Ioffe-Regel limit, and exhibiting non-quasiparticle bad metal transmission characteristics. This unique transmission characteristic and high thermoelectric performance result from complex electronic structure and correlation interaction, including spin and valence state fluctuations, inside TiFexRuyCuzSb. These characteristics enable TiFexRuyCuzSb to more efficiently convert thermal energy into electrical energy during thermoelectric conversion process.

Dependencies are inferred from the claim text.