Enhanced TE properties of Cu@Ag/Bi2Te3 nanocomposites by decoupling electrical and thermal properties

Xiaofang Lu, Qi Zheng, Shijia Gu, Rui Guo, Li Su, Jiancheng Wang, Zhenxing Zhou, Yuchi Fan, Wan Jiang, Lianjun Wang

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

Cu@Ag/Bi2Te3 nanocomposites 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 Bi2Te3 based thermoelectric materials.

Original languageEnglish
Pages (from-to)880-884
Number of pages5
JournalChinese Chemical Letters
Volume31
Issue number3
DOIs
Publication statusPublished - 2020 Mar
Externally publishedYes

Keywords

  • BiTe
  • Cu@Ag
  • Decoupling effect
  • Thermoelectric
  • ZT

ASJC Scopus subject areas

  • Chemistry(all)

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