Power Generation Using Oxide Thermoelectric Modules

Ryoji Funahashi; Saori Urata; Toshiyuki Mihara; Naoki Nabeshima; Kanako Iwasaki

doi:10.4028/www.scientific.net/AST.46.158

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HomeAdvances in Science and TechnologyAdvances in Science and Technology Vol. 46Power Generation Using Oxide Thermoelectric...

Power Generation Using Oxide Thermoelectric Modules

Abstract:

Different versions of thermoelectric unicouples composed of p-type Ca3Co4O9 (Co-349) and n-type LaNiO3 (Ni-113) or CaMnO3 (Mn-113) bulk materials were prepared. In the unicouples p- and n-type legs were connected with Ag electrodes using Ag paste including various oxide powders with various ratios. For the Co-349/Ni-113 unicouples, maximum output power (Pmax) reaches 177mW at a hot side temperature (TH) of 1073K and a temperature differential (ΔT) between TH and cold side temperature of 500K at 6wt% of Co-349 powder. On the other hand, the lowest internal resistance (RI) is observed in a Co-349/Mn-113 unicouple prepared using Ag paste including 3wt% of Mn-113 powder. Thermoelectric modules consisting of 8 pairs of oxide legs were fabricated using the same method with the unicouples. The open circuit voltage (VO) and Pmax increase with increasing TH and reach 0.392 V and 0.314 W, and 0.911 V and 0.233 W at a TH of 1273 K in air for the Co-349/Ni-113 and Co-349/Mn-113 modules, respectively.

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Advances in Science and Technology (Volume 46)

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158-167

DOI:

https://doi.org/10.4028/www.scientific.net/AST.46.158

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Online since:

October 2006

Authors:

Ryoji Funahashi, Saori Urata, Toshiyuki Mihara, Naoki Nabeshima, Kanako Iwasaki

Keywords:

Module, Oxide, Portable Power Source, Thermoelectric Generation

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