A study of electrodes for thermoelectric oxides

Chang Hyun Lim, Soon Mok Choi, Won Seon Seo, Myung Hyun Lee, Kyu Hyoung Lee, Hyung-Ho Park

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Abstract

Oxide module studies for thermoelectric energy harvesting at a high temperature were performed in this study. Considering the degradation of the electrode properties by oxidation at normal operating temperatures in air, a silver electrode (Ag) was selected for use in this study. Two types of contact problems causing a severe loss in electrical power generation were investigated: potential barriers at the interfaces, and inter-diffusion problems. Also, two types of thermoelectric modules were fabricated using Ag electrodes: a module with n-type CaMnO3 and p-type Ca3Co4O9 oxides and another module with n-type (ZnO)7In2O3 and p-type Ca3Co4O9 oxides. The measured power density values were compared with the values calculated from the materials properties.

Original languageEnglish
Pages (from-to)445-449
Number of pages5
JournalElectronic Materials Letters
Volume9
Issue number4
DOIs
Publication statusPublished - 2013 Jul 1

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials

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