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

Le Thanh Hung*, Ngo Van Nong, G. Jeffrey Snyder, Man Hoang Viet, Benjamin Balke, Li Han, Eugen Stamate, Søren Linderoth, Nini Pryds

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

In this study, a segmented p-type leg of doped misfit-layered cobaltite Ca2.8Lu0.15Ag0.05Co4O9+δ 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, ΔT, with the hot side temperature up to 1153 K. At ΔT ≈ 756 K, the maximum conversion efficiency reached a value of ∼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.

Original languageEnglish (US)
Pages (from-to)20-27
Number of pages8
JournalEnergy Conversion and Management
Volume99
DOIs
StatePublished - Jul 15 2015

Keywords

  • Power generation efficiency
  • Segmented oxide-metal alloy
  • Segmented thermoelectrics
  • Thermoelectric efficiency

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Nuclear Energy and Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology

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