Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 13, Issue 21, Pages 24937-24944Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c05525
Keywords
bismuth telluride; thermoelectric; mechanical peiformance; hot pressing AgSbSe2
Funding
- National Natural Science Foundation of China [21875273, 51872301, 52002382]
- Zhejiang Provincial Key R&D Program of China [2021C01026]
- Zhejiang Provincial Natural Science Foundation of China [LR21E020002]
- Youth Innovation Promotion Association CAS [2019298]
Ask authors/readers for more resources
The study demonstrates the synergistically enhanced thermoelectric and mechanical performances of sintered Bi0.48Sb1.52Te3-AgSbSe2 composites, achieving a high ZT value through increased hole concentration and various defects.
Bismuth telluride alloys have dominated the industrial application of thermoelectric cooling, but the relatively poor mechanical performance of commercial zone-melting material seriously limits the device integration and stability. Here, we exhibit synergistically enhanced thermoelectric and mechanical performances of sintered Bi0.48Sb1.52Te3-AgSbSe2 composites. It is found that the increased hole concentration improves the S-2 sigma to 40 mu W cm(-1) K-2 at room temperature, and the emerged various defects effectively suppress the kappa(l) to 0.57 W m(-1) K-1 at 350 K. All effects harvest a highest ZT = 1.2 at 350 K along with an average ZT = 1.0 between 300-500 K in the x = 0.2 sample. Notably, AgSbSe2 addition not only optimizes the thermoelectric properties, but also enhances the mechanical performance with a Vickers hardness of 0.75 GPa. Furthermore, the isotropy of thermoelectric properties is also observably promoted by solid-phase reaction combined with high-energy ball milling and hot pressing. Our study reveals a viable strategy to improve the comprehensive performance of sintered bismuth telluride materials.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available