具有取向晶体纳米片的高性能n型BiTe热电纤维。

High-Performance n-Type BiTe Thermoelectric Fibers with Oriented Crystal Nanosheets.

作者信息

Sun Min, Zhang Pengyu, Tang Guowu, Chen Dongdan, Qian Qi, Yang Zhongmin

机构信息

State Key Laboratory of Luminescent Materials and Devices, Institute of Optical Communication Materials, Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, and Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China.

Nanjing Institute of Future Energy System, Nanjing 211135, China.

出版信息

Nanomaterials (Basel). 2023 Jan 12;13(2):326. doi: 10.3390/nano13020326.

DOI:10.3390/nano13020326

PMID:36678079

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9861060/

Abstract

High-performance thermoelectric fibers with n-type bismuth telluride (BiTe) core were prepared by thermal drawing. The nanosheet microstructures of the BiTe 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 BiTe 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 () after the Bridgman annealing processes increased from 0.48 to about 1 at room temperature.

摘要

通过热拉伸制备了具有n型碲化铋（BiTe）芯的高性能热电纤维。分别通过整体退火和布里奇曼退火工艺对BiTe芯的纳米片微结构进行了调控。研究了退火工艺对微结构和热电性能的影响。由于上述两种退火工艺导致BiTe芯的结晶取向增强，电导率和热导率均得到提高。因此，热电性能得到增强，即在室温下，布里奇曼退火工艺后的优化无量纲品质因数（）从0.48提高到约1。