Energy Density in Ionic Thermoelectric Generators by Prussian Blue Electrodes

Authors: Xia Yang, Jin Liu, Jianchao Jia, Chen Wu, Fei Wang, Dong Yu Zhu, Wei Zeng

Published: 2024-03-08

DOI: 10.34133/energymatadv.0089

Source: Full article


Abstract

Solid-state ionic thermoelectric generators have emerged as promising solutions for efficient harvesting of low-grade waste heat. However, the main challenge in achieving continuous power supply is the low efficiency of thermoelectric conversion. In this work, substantial achievements have been made in improving the thermoelectric conversion characteristics by introducing redox pairs on the electrode surfaces. This approach takes advantage of the synergistic effect of thermal diffusion and thermoelectric effects to maximize the conversion efficiency. To improve the thermoelectric storage and output power performance, Prussian blue was attached to a carbon woven fabric and used as an electrode. The incorporation of Prussian blue/carbon woven fabric electrodes results in an increase in current density output and an instantaneous power density of 3.7 mW/m