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Thermoelectric High Power Generating Module Made by n-Ba8AlxSi46-x Clathrate

Published online by Cambridge University Press:  01 February 2011

Shinji Munetoh ,
Makoto Arita ,
Hideki Makiyama  and
Teruaki Motooka
Shinji Munetoh
Affiliation:
munetoh@zaiko.kyushu-u.ac.jp, Kyushu University, Department of Materials Science and Engineering, 744 Motooka, Fukuoka, 819-0395, Japan, +81(0)92-802-2966, +81(0)92-802-2966
Makoto Arita
Affiliation:
arita@zaiko.kyushu-u.ac.jp, Kyushu University, Department of Materials Science and Engineering, 744 Motooka, Fukuoka, 819-0395, Japan
Hideki Makiyama
Affiliation:
makiyama@zaiko8.zaiko.kyushu-u.ac.jp, Kyushu University, Department of Materials Science and Engineering, 744 Motooka, Fukuoka, 819-0395, Japan
Teruaki Motooka
Affiliation:
motooka@zaiko.kyushu-u.ac.jp, Kyushu University, Department of Materials Science and Engineering, 744 Motooka, Fukuoka, 819-0395, Japan
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Abstract

We have developed a new thermoelectric power-generating module composed of 72 pieces of n-type Ba8Al18Si28 clathrate elements made by arc melting. The Seebeck coefficient, specific electric resistance and thermal conductivity of Ba8Al18Si28 clathrate were 250 μV/K, 1.9 mΩcm and 3.1 W/mK at 500 °C, respectively, and the thermoelectric figure of merit (ZT) was 0.8. The new thermoelectric module was constructed using only n-type thermoelectric elements connected in series with hook-shaped electrodes. The open-circuit voltage of the module increased with hot-side temperature up to 1.8 V at 500 °C and generated 0.24 W. The module was successfully used to charge lithium-ion batteries for mobile phones.

Keywords

thermoelectricclathrateselectrical properties
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1102: Symposium LL – Energy Harvesting–From Fundamentals to Devices , 2008 , 1102-LL04-30
Copyright
Copyright © Materials Research Society 2008

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