Abstract
We report a high-performance thermoelectric (TE) oxide-based
module using the segmentation of half-Heusler
Ti0.3Zr0.35Hf0.35CoSb0.8Sn0.2 and misfit-layered cobaltite
Ca3Co4O9+δ as the p-leg and 2% Al-doped ZnO as the n-leg.
The maximum output power of a 4-couple segmented
module at ΔT=700 K attains a value of approximately
6.5 kWm-2, which is three times higher than that of the best
reported non-segmented oxide module. The TE properties of
individual legs, as well as the interfacial contact resistances,
were characterized as a function of temperature. Numerical
modeling was used to predict the efficiency and to evaluate
the influence of the electrical and thermal losses on the performance
of TE modules. Initial long-term stability tests of
the module at the hot and the cold side temperatures of
1073 K and 444 K, respectively, showed a promising result
with 4% degradation for 48 h operating in air.
Original language | English |
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Journal | Energy Technology |
Volume | 3 |
Issue number | 11 |
Pages (from-to) | 1143–1151 |
Number of pages | 10 |
ISSN | 2194-4288 |
DOIs | |
Publication status | Published - 2015 |