Impact of Boron Nitride on the Thermoelectric Properties and Service Stability of Cu<sub>2–<i>x</i></sub>Se
Improving the thermoelectric performance and service stability is essential for the effective use of cuprous selenide (Cu<sub>2-<i>x</i></sub>Se). In this study, hexagonal boron nitride (h-BN) was incorporated into nano-Cu<sub>2-<i>x</i></sub>Se, with the goal of enhancing thermoelectric performance and service stability. It was found that Cu<sub>2-<i>x</i></sub>Se-0.005 wt % BN showed a higher thermoelectric figure of merit (<i>zT)</i> value (∼1.76 at 923 K), which was 11% greater than that of pure Cu<sub>2-<i>x</i></sub>Se, mainly due to a significant reduction in lattice thermal conductivity (<i>k</i><sub>L</sub>) to about 50% (0.13 W m<sup>-1</sup> K<sup>-1</sup>). Additionally, the formation of an ion-blocking interface by hexagonal boron nitride effectively shortens the migration path of Cu<sup>+</sup> ions, improving service stability while maintaining the contribution of Cu<sup>+</sup> transitions to thermal conductivity. Finally, an increase in hardness of ∼11.1% was observed, reaching 0.7 GPa in Cu<sub>2-<i>x</i></sub>Se-0.02 wt % BN. This research is a feasible approach to improving the service stability of Cu<sub>2-<i>x</i></sub>Se.
Authors
- Qiang Xiao (ORCID: https://orcid.org/0000-0003-2812-7778)
- Changcun Li (ORCID: https://orcid.org/0000-0002-2832-757X)
- Aijun Hong (ORCID: https://orcid.org/0000-0002-5328-8760)
- Yanli Wu
- Zihao Lin
- Yajing Guo (ORCID: https://orcid.org/0000-0002-5229-6080)
- Fangfang Kong
- Jiang Bai
Institutions
- University of Jinan (CN)
- Jiangxi Science and Technology Normal University (CN)
- Jiangxi Normal University (CN)
Publication Details
- Journal
- ACS Applied Materials & Interfaces
- Published
- 2024-12-30
- DOI
- https://doi.org/10.1021/acsami.4c16857
- Citations
- 2
- Primary Topic
- Advanced Thermoelectric Materials and Devices
- Type
- article
- Field-Weighted Citation Impact
- 0.23
Funders
- China Postdoctoral Science Foundation
- Education Department of Jiangxi Province
- Jiangxi Science and Technology Normal University
- Shandong Provincial Postdoctoral Science Foundation