DocumentCode
2174566
Title
Effect of Ag substitution for Co on thermoelectric properties of NaCo2O4
Author
Anno, H. ; Egawa, S. ; Imai, Y. ; Matsubara, K
Author_Institution
Sci. Univ. of Tokyo in Yamaguchi, Onoda, Japan
fYear
2001
fDate
2001
Firstpage
210
Lastpage
213
Abstract
We have investigated the effect of Ag substitution for Co on thermoelectric properties of NaCo2O4. NaCo2-x AgxO4 compounds with x=0-0.4 were prepared by a solid-state reaction using NaCO3, Co3O4 , and Ag2O as starting materials. Measurements of the Seebeck coefficient, the electrical conductivity, and the thermal conductivity were made in the wide temperature range. Polycrystalline samples of p-type NaCo2-xAgxO4 were obtained for x=0-0.4. The electrical conductivity increased with increasing composition x, and the Seebeck coefficient was almost independent of x in the range of x=0-0.2. The effect of Ag substitution for Co on the electronic structure and thermoelectric properties of NaCo 2O4 is discussed from the transport properties, together with the results of x-ray photoelectron spectroscopy measurements
Keywords
Seebeck effect; band structure; cobalt compounds; silver compounds; sodium compounds; thermal conductivity; thermoelectricity; Ag substitution; NaCo2-xAgxO4; NaCo2O4; Seebeck coefficient; electrical conductivity; electronic structure; thermal conductivity; thermoelectric properties; x-ray photoelectron spectroscopy; Conducting materials; Conductivity measurement; Electric variables measurement; Land surface temperature; Performance evaluation; Solid state circuits; Spectroscopy; Temperature distribution; Thermal conductivity; Thermoelectricity;
fLanguage
English
Publisher
ieee
Conference_Titel
Thermoelectrics, 2001. Proceedings ICT 2001. XX International Conference on
Conference_Location
Beijing
ISSN
1094-2734
Print_ISBN
0-7803-7205-0
Type
conf
DOI
10.1109/ICT.2001.979870
Filename
979870
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