HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

The Influence of Mobile Copper Ions on the Glass-Like Thermal Conductivity of Copper-Rich Tetrahedrites

Abstract : Tetrahedrites are promising p-type thermoelectric materials for energy recovery. We present here the first investigation of the structure and thermoelectric properties of copper-rich tetrahedrites, Cu12+xSb4S13 (0 < x <= 2.0). At room temperature, all samples with x > 0 consist of two tetrahedrite phases. In situ neutron diffraction data demonstrate that on heating, the two tetrahedrite phases coalesce into a single tetrahedrite phase at temperatures between 493 and 553 K and that this transition shows marked hysteresis on cooling. Our structural data indicate that copper ions become mobile above 393 K. Marked changes in the temperature dependence of the electrical and thermal transport properties of the copper-rich phases occur at the onset of copper mobility. Excess copper leads to a significant reduction in the total thermal conductivity, which for the nominal composition Cu14Sb4S13 reaches a value as low as 0.44 W m(-1) K-1 at room temperature, and to thermoelectric properties consistent with phonon liquid electron crystal (PLEC) behavior.
Complete list of metadata

Contributor : Elisabeth van T Hof Connect in order to contact the contributor
Submitted on : Friday, July 5, 2019 - 5:01:04 PM
Last modification on : Wednesday, May 25, 2022 - 5:50:04 PM

Links full text



Ronald I. Smith, Tristan Barbier, Emmanuel Guilmeau, Anthony V. Powell, Paz Vaqueiro, et al.. The Influence of Mobile Copper Ions on the Glass-Like Thermal Conductivity of Copper-Rich Tetrahedrites. Chemistry of Materials, American Chemical Society, 2017, 29 (9), pp.4080-4090. ⟨10.1021/acs.chemmater.7b00891⟩. ⟨hal-02175414⟩



Record views