POS5-1117
Anion-Trapping Ionic Hydrogel for Enhanced Thermodiffusion-Driven Energy Conversion
When and Where
Nov 30, -0001
00:00 - 00:00
Presenter(s)
Taehoon Kang (University of Seoul)
Co-Author(s)
Abstract
Soft wearable devices require energy materials that can convert temperature gradients into electrical energy. Ionic thermoelectric hydrogels are promising because hydrated polymer networks enable ion migration by thermodiffusion, producing a potential difference between hot and cold sides. Here, we propose a Li2SO4-based PAAm/alginate hydrogel incorporating poly(diallyldimethylammonium chloride) (PDADMAC) as a cationic additive. The fixed quaternary ammonium groups of PDADMAC are expected to interact with SO42- anions, suppressing anion migration and promoting Li+ dominated transport. This ion-selective regulation is designed to enhance charge separation and improve thermovoltage and current output. The hydrogel is prepared by free-radical polymerization and Ca2+ crosslinking to form a stable double-network structure. This study suggests a strategy for improving thermodiffusion-driven energy conversion in flexible wearable devices.
