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2011-Sustainable Industrial Processing Summit
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| Editors: | Florian K |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2012 |
| Pages: | 646 pages |
| ISBN: | 978-0-9879917-6-8 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
Thermoelectric Properties Of Cu-doped Na(Co1-xCux)2O4 Oxides For Power Generation
Kyeongsoon Park1; G. Lee1; W. Seo2;1SEJONG UNIVERSITY, Seoul, Korea, South; 2KOREA INSTITUTE OF CERAMIC ENGINEERING AND TECHNOL, Seoul, Korea, South;
Type of Paper: Regular
Id Paper: 357
Topic: 9
Abstract:
Na(Co1-xCux)2O4 (0≦x≦0.2) nano-sized powders were synthesized by solution combustion process. The process was highly effective in synthesizing high-quality Na(Co1-xCux)2O4 nanopowders. The effect of thermoelectric properties for the Na(Co1-xCux)2O4 was studied, considering the Cu content. The density and grain size were increased by adding Cu for Co in NaCo2O4. The electrical conductivity (σ) of the Na(Co1-xCux)2O4 decreased with temperature, indicating a metallic behavior. The Seebeck coefficient (α) slowly increased with temperature and its sign was positive, i.e., p-type conduction. The power factor gradually increased up to 800 ℃. The partial substitution of Cu for Co in NaCo2O4 led to a significant increase in the power factor (σα2). We believe that the partial substitution of Cu is considered to be favorable for improving the thermoelectric properties of NaCo2O4.