热电效应
热电材料
可扩展性
材料科学
热电发电机
缩放比例
工作(物理)
工程物理
计算机科学
工艺工程
光电子学
热力学
数据库
物理
数学
工程类
几何学
作者
Li Xie,Ming Chen,Qingfeng Song,Chao Wang,Jincheng Liao,L. Wang,Chenxi Zhu,Zhenqin Li,Yi‐Yang Sun,Shengqiang Bai,Lidong Chen
出处
期刊:Science Advances
[American Association for the Advancement of Science (AAAS)]
日期:2023-07-07
卷期号:9 (27)
被引量:1
标识
DOI:10.1126/sciadv.adg7919
摘要
GeTe-based materials with superior thermoelectric properties promise great potential for waste heat recovery. However, the lack of appropriate diffusion barrier materials (DBMs) limits not only the energy conversion efficiency but also the service reliability of the thermoelectric devices. Here, we propose a design strategy based on phase equilibria diagrams from first-principles calculations and identify transition metal germanides (e.g., NiGe and FeGe 2 ) as the DBMs. Our validation experiment confirms the excellent chemical and mechanical stabilities of the interfaces between the germanides and GeTe. We also develop a process for scaling up the GeTe production. Combining with module geometry optimization, we fabricate an eight-pair module using mass-produced p-type Ge 0.89 Cu 0.06 Sb 0.08 Te and n-type Yb 0.3 Co 4 Sb 12 and achieve a record-high efficiency of 12% among all reported single-stage thermoelectric modules. Our work thus paves the way for waste heat recovery based on completely lead-free thermoelectric technology.
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