Oxide-based thermoelectric power generation module using p-type Ca_3Co_4O_9 and n-type (ZnO)_7In_2O_3 legs

摘要

This study presents the fabrication of an oxide-based thermoelectric power generation module using layer-structured p-type Ca_3Co_4O_9 and n-type (ZnO)_7ln_2O_3 legs. The potential for development and effective use of high power density thermoelectric generation system is investigated in terms of its power per area, the temperature conditions, and the number of p-n couples. The significance of the manufacturing factors including contact between legs and electrodes are discussed. The thermoelectric figure of merit values of the p-type and n-type legs at 1100 K were 0.55 x 10~(-4) K~(-1) and 1.35 x 10~(-4) K~(-1) respectively. The maximum power obtained was 423 mW with the 44 p-n couples module, under the thermal condition of a hot-side temperature of 1100 K and a temperature difference △T = 673 K.