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Science China Technological Sciences

, Volume 62, Issue 9, pp 1596–1604 | Cite as

Development of integrated two-stage thermoelectric generators for large temperature difference

  • Jun Pei
  • LiangLiang Li
  • DaWei Liu
  • BoPing ZhangEmail author
  • Yu Xiao
  • JingFeng LiEmail author
Article
  • 28 Downloads

Abstract

Multi-stage thermoelectric (TE) modules can withstand a large temperature difference and can be used to obtain a high conversion efficiency. In this study, two-stage PbTe/Bi2Te3 TE modules were developed with an enhanced efficiency through a comprehensive study of device structure design, module fabrication, and performance evaluation. PbTe-based AgPbmSbTem+2 (abbreviated as LAST) is a typically high ZT material, while the corresponding TE module was rarely reported so far. How to utilize LAST to fabricate high efficiency TE modules therefore remains a central problem. Finite element simulation indicates that the temperature stability of the two-stage module for LAST is better than that of two-segmented module. Compared to Cu, Ni, and Ni-Fe alloys, Co-Fe alloy is an effective metallization layer for PbTe due to its low contact resistance and thin diffusion layer. By sintering a slice of Cu on TE legs, pure tinfoil can be used as a common welding method for mid-temperature TE modules. A maximum efficiency (ηmax) of 9.5% was achieved in the range of 303 to 923 K in an optimized PbTe/Bi2Te3 based two-stage module, which was almost twice that of a commercial TE module.

En

PbTe thermoelectric two-stage module finite element method conversion efficiency 

Notes

Supplementary material

11431_2019_9498_MOESM1_ESM.pdf (920 kb)
Development of integrated two-stage thermoelectric generators for large temperature difference

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Copyright information

© Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.The Beijing Municipal Key Laboratory of New Energy Materials and Technologies, School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijingChina
  2. 2.State Key Laboratory of New Ceramics and Fine ProcessingTsinghua UniversityBeijingChina
  3. 3.Huaneng Clean Energy Research InstituteBeijingChina
  4. 4.School of Materials Science and EngineeringBeihang UniversityBeijingChina

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