On the Challenges of Reducing Contact Resistances in Thermoelectric Generators Based on Half-Heusler Alloys

被引：27

作者：

Pham Hoang Ngan ^{[1
]}

Ngo Van Nong ^{[1
]}

Le Thanh Hung ^{[1
]}

Balke, Benjamin ^{[2
]}

Han, Li ^{[1
]}

Hedegaard, Ellen Marie Jensen ^{[3
]}

Linderoth, Soren ^{[1
]}

Pryds, Nini ^{[1
]}

机构：

[1] Tech Univ Denmark, Dept Energy Convers & Storage, 399 Frederiksborgvej, DK-4000 Roskilde, Denmark

[2] Johannes Gutenberg Univ Mainz, Inst Inorgan & Analyt Chem, D-55099 Mainz, Germany

[3] Aarhus Univ, Dept Chem, Ctr Mat Crystallog, DK-8000 Aarhus, Denmark

来源：

JOURNAL OF ELECTRONIC MATERIALS | 2016年 / 45卷 / 01期

基金：

新加坡国家研究基金会;

关键词：

Thermoelectric; thermoelectric generators; half-Heusler; contact; joining; energy conversion; MODULE; COPPER; PERFORMANCE; SILVER;

D O I：

10.1007/s11664-015-4156-z

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A method using fast hot pressing to join half-Heusler (HH) thermoelectric materials directly to an electrical current collector (Ag electrode) without using a third filler material is introduced. The compositions of the HH alloys used are Hf0.5Zr0.5CoSn0.2Sb0.8 and Ti0.6Hf0.4NiSn for p- and n-type, respectively. Using this method, the quality of the HH-electrode contacts is improved due to their low electrical contact resistance and less reaction-diffusion layer. The microstructure and chemical composition of the joints were examined using a scanning electron microscope equipped with energy-dispersive x-ray analysis. The electrical characteristics of the interfaces at the contacts were studied based on electrical contact resistance and Seebeck scanning microprobe measurements. In this paper, we show that joining the HH to a Ag electrode directly using fast hot pressing resulted in lower contact resistance and better performance compared with the method of using active brazing filler alloy.

引用

页码：594 / 601

页数：8

共 41 条

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