High-temperature oxide thermoelectrics

Abstract

We have evaluated the power factor of transition metal oxides at high temperatures using the Heikes formula and the Ioffe-Regel conductivity. The evaluated power factor is found to be nearly independent of carrier concentration in a wide range of doping, and well explains the experimental data for cobalt oxides. This suggests that the same power factor can be obtained with a thermopower larger than $2k_B/e$, and also suggests a reasonably high value of the dimensionless figure of merit $ZT$. We propose an oxide thermoelectric power generator by using materials having a thermopower larger than 300 $\mu$V/K.

5 pages, 2 figures

References in corpus (5)

• Huge Seebeck coefficients in non-aqueous electrolytes
• La0.95Sr0.05CoO3: An efficient room-temperature thermoelectric oxide
• Scaling behavior in thermoelectric misfit cobalt oxides
• Properties of the hole and electron doped perovskites LnCoO3
• Interplay between magnetic properties and thermoelectricity in misfit and Na cobaltates

Cited by in corpus (5)

• A thermoelectric heat engine with ultracold atoms
• Understanding the Thermoelectric Properties of LaCoO${}_3$ Compound
• Magnetic, electrochemical and thermoelectric properties of $P2-N{a}_x(C{o}_{7/8}S{b}_{1/8})O_2$
• Na Site Doping a Pathway for Enhanced Thermoelectric Performance in $N{a}_{1-x}Co{O}_2$; The Case of Gd and Yb Dopants
• Electrical and Thermal transport studies of Sr and Mn co-substituted NdCoO3