Abstract
High-performance thermoelectric fibers with n-type bismuth telluride (Bi2Te3) core were prepared by thermal drawing. The nanosheet microstructures of the Bi2Te3 core were tailored by the whole annealing and Bridgman annealing processes, respectively. The influence of the annealing processes on the microstructure and thermoelectric performance was investigated. As a result of the enhanced crystalline orientation of Bi2Te3 core caused by the above two kinds of annealing processes, both the electrical conductivity and thermal conductivity could be improved. Hence, the thermoelectric performance was enhanced, that is, the optimized dimensionless figure of merit (ZT) after the Bridgman annealing processes increased from 0.48 to about 1 at room temperature.
Funder
Natural Science Foundation of China
2021 Talent Revitalization Plan Project for New High Performance Material Industry in Qingyuan City
Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program
Key R&D Program of Guangzhou
Carbon Peaking Carbon Neutrality Science and Technology Innovation of Jiangsu Province
Subject
General Materials Science,General Chemical Engineering
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