Work

Synthesis and Characterization of CNTs/Bi2Te3 Thermoelectric Nanocomposites

Year: 2013

Type: article

Abstract: Multi-walled carbon nanotubes (MWNTs)/Bi2Te3 composite thermoelectric films were prepared by potentiostatic electrodeposition at room temperature. The morphology, composition and electrical resistivity of the films were analyzed by environment scanning electron microscopy (ESEM), energy dispersive spectroscopy (EDS), and four-probe resistivity measuring device. Effect of the concentration of MWNTs in the electrolyte on the electrical resistivity of the composites was also evaluated. The results show that the resistivity of the composites films decreases remarkably at the present of MWNTs. This effect turns to be more notable at more negative deposition potentials due to the increase of composited MWNTs. In the process of adding more MWNTs into the electrolytes, the resistivity of the composites decreases first and then achieves stable. The optimum of resistivity as 0.93×10-5 Ω·m was obtained at the deposition potential of -0.07V, the added amount of MWNTs is equal to or greater than 3mg/ml. This work suggests a new method to improve thermoelectric properties of Bi2Te3 based materials.

Source: International Journal of Electrochemical Science

DOI: 10.1016/s1452-3981(23)14796-1

Authors: Han Xu, Wei Wang

Institution: Tianjin University

Language: English

Topic: Advanced Thermoelectric Materials and Devices

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: gold

Estimated APC paid: $1,670