Enhanced TE properties of Cu@Ag/Bi2Te3 nanocomposites by decoupling electrical and thermal properties
Enhanced TE properties of Cu@Ag/Bi2Te3 nanocomposites by decoupling electrical and thermal properties
复制标题
通过解耦电性能和热性能增强 Cu@Ag/Bi2Te3 纳米复合材料的 TE 性能
DOI：
10.1016/j.cclet.2019.07.034
复制
发表时间：
2020
影响因子：
9.1
通讯作者：
Lianjun Wang
中科院分区：
文献类型：
--
作者：
Xiaofang Lu;Qi Zheng;Shijia Gu;Rui Guo;Li Su;Jiancheng Wang;Zhenxing Zhou;Yuchi Fan;Wan Jiang;Lianjun Wang
Cu@Ag/Bi2Te3nanocomposites were prepared for the first time by ultrasonic dispersion-rapid freeze-drying method combined with spark plasma sintering (SPS). By changing the content of Cu@Ag nanoparticle, we could modulate the temperature dependent thermoelectric properties. The highest ZT value can be obtained at 450 K for 1 vol% Cu@Ag/Bi2Te3, which is benefited from the decoupling of electrical and thermal properties. With the increase of electrical conductivity, the absolute value of Seebeck coefficient lifts while the thermal conductivity declines. Meanwhile, the average ZT value between 300 K and 475 K was 0.61 for 1 vol% Cu@Ag/Bi2Te3, which is much higher than that of pristine Bi2Te3. Therefore, the decoupling effect of Cu@Ag nanoparticles incorporation could be a promising method to broaden the application of Bi2Te3based thermoelectric materials.
