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Evaluation of Thermoelectric Performance and Durability of Functionalized Skutterudite Legs

Skomedal, Gunstein and Kristiansen, Nils R. and Sottong, Reinhard and Middleton, Hugh (2017) Evaluation of Thermoelectric Performance and Durability of Functionalized Skutterudite Legs. Journal of Electronic Materials. Springer. DOI: 10.1007/s11664-017-5309-z ISSN 0361-5235

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Abstract

Thermoelectric generators are a promising technology for waste heat recovery. As new materials and devices enter a market penetration stage, it is of interest to employ fast and efficient measurement methods to evaluate the long-term stability of thermoelectric materials in combination with metallization and coating (functionalized thermoelectric legs). We have investigated a method for measuring several thermoelectric legs simultaneously. The legs are put under a common temperature gradient, and the electrical characteristics of each leg are measured individually during thermal cycling. Using this method, one can test different types of metallization and coating applied to skutterudite thermoelectric legs and look at the relative changes over time. Postcharacterization of these initial tests with skutterudite legs using a potential Seebeck microprobe and an electron microscope showed that oxidation and interlayer diffusion are the main reasons for the gradual increase in internal resistance and the decrease in open-circuit voltage. Although we only tested skutterudite material in this work, the method is fully capable of testing all kinds of material, metallization, and coating. It is thus a promising method for studying the relationship between failure modes and mechanisms of functionalized thermoelectric legs.

Item URL in elib:https://elib.dlr.de/115101/
Document Type:Article
Title:Evaluation of Thermoelectric Performance and Durability of Functionalized Skutterudite Legs
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Skomedal, GunsteinFaculty of Engineering and Science, University of Agder, 4879 Grimstad, NorwayUNSPECIFIED
Kristiansen, Nils R.Faculty of Engineering and Science, University of Agder, Grimstad, NorwayUNSPECIFIED
Sottong, Reinhardgerman aerospace center, institute of materials research, köln, germanyUNSPECIFIED
Middleton, HughFaculty of Engineering and Science, University of Agder, Grimstad, NorwayUNSPECIFIED
Date:7 February 2017
Journal or Publication Title:Journal of Electronic Materials
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1007/s11664-017-5309-z
Publisher:Springer
ISSN:0361-5235
Status:Published
Keywords:Skutterudite, Thermal cycling, Degradation, Oxidation, Interlayer diffusion, Coating
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Terrestrial Vehicles (old)
DLR - Research area:Transport
DLR - Program:V BF - Bodengebundene Fahrzeuge
DLR - Research theme (Project):V - NGC-Antriebsstrang (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Thermoelectric Materials and Systems
Deposited By: Yasseri, Mohammad
Deposited On:22 Nov 2017 10:21
Last Modified:10 Jan 2019 15:09

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  • Evaluation of Thermoelectric Performance and Durability of Functionalized Skutterudite Legs. (deposited 22 Nov 2017 10:21) [Currently Displayed]

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