High performance p-type segmented leg of misfit-layered cobaltite and half-Heusler alloy

被引：23

作者：

Hung, Le Thanh ^{[1
]}

Ngo Van Nong ^{[1
]}

Snyder, G. Jeffrey ^{[2
]}

Man Hoang Viet ^{[3
]}

Balke, Benjamin ^{[4
]}

Han, Li ^{[1
]}

Stamate, Eugen ^{[1
]}

Linderoth, Soren ^{[1
]}

Pryds, Nini ^{[1
]}

机构：

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

[2] CALTECH, Pasadena, CA 91125 USA

[3] N Carolina State Univ, Dept Phys, Raleigh, NC 27695 USA

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

来源：

ENERGY CONVERSION AND MANAGEMENT | 2015年 / 99卷

关键词：

Segmented thermoelectrics; Segmented oxide-metal alloy; Thermoelectric efficiency; Power generation efficiency; THERMOELECTRIC-MATERIALS; PROGRESS; FIGURE; MERIT;

D O I：

10.1016/j.enconman.2015.03.112

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In this study, a segmented p-type leg of doped misfit-layered cobaltite Ca2.8Lu0.15Ag0.05Co4O9+delta and half-Heusler Ti0.3Zr0.35Hf0.35CoSb0.8Sn0.2 alloy was fabricated and characterized. The thermoelectric properties of single components, segmented leg, and the electrical contact resistance of the joint part were measured as a function of temperature. The output power generation characteristics of segmented legs were characterized in air under various temperature gradients, Delta T, with the hot side temperature up to 1153 K. At Delta T approximate to 756 K, the maximum conversion efficiency reached a value of similar to 5%, which is about 65% of that expected from the materials without parasitic losses. The long-term stability investigation for two weeks at the hot and cold side temperatures of 1153/397 K shows that the segmented leg has good durability as a result of stable and low electrical resistance contacts. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：20 / 27

页数：8

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