Thermal stability of FeSi as barrier layer in high-performance Mg2Si0.3Sn0.7 thermoelectric device

IF 8.4 1区 材料科学 Q1 CHEMISTRY, PHYSICAL Journal of Materiomics Pub Date : 2025-03-14 DOI:10.1016/j.jmat.2025.101044
Shanshan Hu, Chen Huang, Changyuan Li, Long Yang, Zhiwei Chen, Baisheng Sa, Wen Li, Yanzhong Pei
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Abstract

Thermal stability of thermoelectric devices plays a pivotal role in their practical applications. Chemical reaction/diffusion between thermoelectric materials and electrodes is one of the primary factors contributing to the degradation/failure of device performance at elevated temperatures. Introducing barrier layers to impede the behavior of chemical reactions has emerged as an effective approach for averting the failure of these devices. In this work, the FeSi is revealed to be a potent material of barrier layer in high-performance Mg2Si0.3Sn0.7 thermoelectric material based on the considerations of interfacial reaction energy and sinterability. The well-established bond in Mg2Si0.3Sn0.7/FeSi joint results in a low contact resistivity of ∼20 μΩ⸱cm2 and a conversion efficient of ∼6.5% for the Mg2Si0.3Sn0.7 single-leg device is achieved at a temperature difference of ∼290 K. The long-term measurements of the device at a hot-side temperature of 600 K reveal that the performance remains nearly invariable as time further increases, which suggests that the FeSi layer retards the chemical reaction/diffusion.

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来源期刊
Journal of Materiomics
Journal of Materiomics Materials Science-Metals and Alloys
CiteScore
14.30
自引率
6.40%
发文量
331
审稿时长
37 days
期刊介绍: The Journal of Materiomics is a peer-reviewed open-access journal that aims to serve as a forum for the continuous dissemination of research within the field of materials science. It particularly emphasizes systematic studies on the relationships between composition, processing, structure, property, and performance of advanced materials. The journal is supported by the Chinese Ceramic Society and is indexed in SCIE and Scopus. It is commonly referred to as J Materiomics.
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