Enhanced thermoelectric properties of Bi1.92Li0.08Sr2Co2Oy x wt% SiC composites
Document Type
Article
Publication Date
1-1-2025
Abstract
In this work, Bi1.92Li0.08Sr2Co2Oy/x wt% SiC (1.0 <= x <= 4.0 wt%) composites are fabricated through a solid-state reaction followed by spark plasma sintering. The resulting composites exhibit plate-like grains and high density. The addition of SiC nanoparticles reduces electrical conductivity due to decreased hole mobility and increases the Seebeck coefficient due to an enhanced scattering factor and effective mass. Furthermore, the incorporation of SiC nanoparticles significantly enhances phonon scattering, thereby reducing phonon thermal conductivity. The Bi1.92Li0.08Sr2Co2Oy/2.0 wt% SiC composite exhibits the largest ZT of 0.17 at 973 K due to its high Seebeck coefficient and low thermal conductivity. Our results demonstrate that incorporating SiC nanoparticles is a highly effective strategy for enhancing the thermoelectric properties of Bi1.92Li0.08Sr2Co2Oy.
Keywords
Energy, Climate change, Spark plasma sintering, Composites, Seebeck coefficient, Thermoelectric properties
Divisions
mechanical
Funders
Ministry of Environment (ME), Republic of Korea
Publication Title
Inorganic Chemistry Communications
Volume
171
Publisher
Elsevier
Publisher Location
RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS