Synergistic Combination of Sb2Si2Te6 Additives for Enhanced Average ZT and Single-Leg Device Efficiency of Bi0.4Sb1.6Te3-based Composites

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Please use this identifier to cite or link to this item: https://oar.a-star.edu.sg/communities-collections/articles/20371

Title:

Synergistic Combination of Sb2Si2Te6 Additives for Enhanced Average ZT and Single-Leg Device Efficiency of Bi0.4Sb1.6Te3-based Composites

Journal Title:

Advanced Science

DOI:

10.1002/advs.202400870

Publication URL:

http://dx.doi.org/10.1002/advs.202400870

Authors:

Xian Yi Tan, Jinfeng Dong, Jiawei Liu, Danwei Zhang, Samantha Faye Duran Solco, Kıvanç Sağlık, Ning Jia, Ivan Joel Wen Jie You, Sheau Wei Chien, Xizu Wang, Lei Hu, Yubo Luo, Yun Zheng, Debbie Xiang Yun Soo, Rong Ji, Ken Choon Hwa Goh, Yilin Jiang, Jing‐Feng Li, Ady Suwardi, Qiang Zhu, Jianwei Xu, Qingyu Yan

Keywords:

Publication Date:

30 March 2024

Citation:

Tan, X. Y., Dong, J., Liu, J., Zhang, D., Solco, S. F. D., Sağlık, K., Jia, N., You, I. J. W. J., Chien, S. W., Wang, X., Hu, L., Luo, Y., Zheng, Y., Soo, D. X. Y., Ji, R., Goh, K. C. H., Jiang, Y., Li, J., Suwardi, A., … Yan, Q. (2024). Synergistic Combination of Sb2Si2Te6 Additives for Enhanced Average ZT and Single‐Leg Device Efficiency of Bi0.4Sb1.6Te3‐based Composites. Advanced Science, 11(23). Portico. https://doi.org/10.1002/advs.202400870

Abstract:

AbstractThermoelectric materials are highly promising for waste heat harvesting. Although thermoelectric materials research has expanded over the years, bismuth telluride‐based alloys are still the best for near‐room‐temperature applications. In this work, a ≈38% enhancement of the average ZT (300−473 K) to 1.21 is achieved by mixing Bi0.4Sb1.6Te3 with an emerging thermoelectric material Sb2Si2Te6, which is significantly higher than that of most BiySb2−yTe3‐based composites. This enhancement is facilitated by the unique interface region between the Bi0.4Sb1.6Te3 matrix and Sb2Si2Te6‐based precipitates with an orderly atomic arrangement, which promotes the transport of charge carriers with minimal scattering, overcoming a common factor that is limiting ZT enhancement in such composites. At the same time, high‐density dislocations in the same region can effectively scatter the phonons, decoupling the electron‐phonon transport. This results in a ≈56% enhancement of the thermoelectric quality factor at 373 K, from 0.41 for the pristine sample to 0.64 for the composite sample. A single‐leg device is fabricated with a high efficiency of 5.4% at ΔT = 164 K further demonstrating the efficacy of the Sb2Si2Te6 compositing strategy and the importance of the precipitate‐matrix interface microstructure in improving the performance of materials for relatively low‐temperature applications.

License type:

Attribution 4.0 International (CC BY 4.0)

Funding Info:

This research / project is supported by the A*STAR - Career Development Award
Grant Reference no. : C210112022

This research / project is supported by the A*STAR, Science and Engineering Research Council - Sustainable Hybrid Lighting System for Controlled Environment Agriculture programme
Grant Reference no. : A19D9a0096

This research is supported by core funding from: A*STAR
Grant Reference no. : SC25/21-102419

This research / project is supported by the Ministry of Education - ACRF Tier 1
Grant Reference no. : RG128/21

This research / project is supported by the Ministry of Education - ACRF Tier 1
Grant Reference no. : RT6/22

Description:

URI:

https://oar.a-star.edu.sg/communities-collections/articles/20371

ISSN:

2198-3844

Collections:

Institute of Materials Research and Engineering

Files uploaded:

https://doi.org/10.1002/advs.202400870