(Invited) Thermoelectric Materials and Modules for High Temperature Application. (14th September 2015)

• Record Type: Journal Article
• Authors: Funahashi, Ryoji; Barbier, Tristan
• Is Part Of: ECS transactions. Volume 69:Number 9(2015)
• Page Start: 17
• Page End: 20
• Publication Date: 2015-09-14
• Subjects: Electrochemistry -- Periodicals; Electrochemistry; Periodicals; Electronic journals; Electronic journal; 541.37
• DOI: 10.1149/06909.0017ecst
• Languages: English
• ISSNs: 1938-5862

Abstract

Abstract : A layered misfit Ca3 Co4 O9 shows high thermoelectric efficiency at high temperature in air. Thermoelectric modules using p-type Ca3 Co4 O9 and n-type CaMnO3 have been produced. The maximum power density reaches 4.3 kW/m 2 at 973 K of the heat source temperature. A new n-type silicide material, Mn3 Si4 Al2 has been discovered. The dimensionless thermoelectric figure of merit reaches 0.21 at 773 K. This silicide shows good oxidation resistance at 873 K in air. Thermoelectric modules consisting of 64 pairs of legs have been fabricated using MnSi1.7 and Mn3 Si4 Al2 as p- and n-type legs, respectively. Output power reaches 9.4 W corresponding to 2.3 kW/m 2 of power density at 873 K of the heat source temperature in air.