Thermoelectric transport properties of Ca3Co4↿em>x Ni x O9+
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- 作者：K. Park ; J. S. Cha ; S. W. Nam ; S.-M. Choi…
- 关键词：Ca3Co4O9 ; Thermoelectricity ; Seebeck coefficient ; Power factor ; Electrical conductivity
- 刊名：Journal of the Korean Physical Society
- 出版年：2016
- 出版时间：January 2016
- 年：2016
- 卷：68
- 期：1
- 页码：138-142
- 全文大小：805 KB
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J. S. Cha (1)
S. W. Nam (1)
S.-M. Choi (2)
W.-S. Seo (3)
S. Lee (3)
Y. S. Lim (3)
1. Faculty of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul, 05006, Korea
2. School of Energy, Materials and Chemical Engineering, Korea University of Technology and Education, Cheonan, 31253, Korea
3. Energy & Environmental Division, Korea Institute of Ceramic Engineering and Technology, Seoul, 08513, Korea - 刊物主题：Physics, general; Theoretical, Mathematical and Computational Physics; Particle and Nuclear Physics;
- 出版者：Springer Netherlands
- ISSN：1976-8524
文摘
Nano-sized Ca3Co4−x Ni x O9+δ (0 ≤ x ≤ 0.3) thermoelectric powders are synthesized by using the solution combustion method, with aspartic acid as a combustion fuel. The synthesized Ca3Co4−x Ni x O9+δ nano-sized powders exhibit a spherical-like shape and a smooth surface. Higher Ni content results in a smaller grain size and a higher porosity, resulting in a decrease in the electrical conductivity. However, the Seebeck coefficient of Ni-added Ca3Co4O9 is much higher than that of Ca3Co4O9. The highest power factor (1.4 × 10−4 Wm−1K−2), which is more than nine times larger than that of Ca3Co4O9, is attained for Ca3Co0.38Ni0.2O9+δ at 800 °C. The addition of a small amount of Ni is highly effective in improving the thermoelectric properties of Ca3Co4O9. We believe that Ca3Co4−x Ni x O9+δ is a potential p-type thermoelectric material for renewable energy conversion.