[3PS-224]
Preparation and Characterization of Urethane and BDE-based Polymer Electrolytes via LiFSI-initiated Polymerization
발표자이지예 (건국대학교)
연구책임자장호현 (건국대학교)
Abstract
Commercial liquid electrolytes used in lithium secondary batteries possess high ionic conductivity but suffer from limited electrochemical and chemical stability. Consequently, polymer electrolytes (PEs) are being actively researched for next-generation batteries due to their enhanced stability. However, conventional PEs face a trade-off limitation between ionic conductivity and mechanical strength.
To overcome this, we synthesized a novel monomer incorporating a urethane structure for mechanical strength and a fluorosulfonyl group to facilitate lithium ion dissociation. In the fabrication process, the synthesized monomer was first mixed with LiFSI to induce salt dissociation, and then blended with 1,4-butanediol diglycidyl ether (BDE), which imparts flexibility, at various ratios to fabricate PEs.
The structures were characterized using NMR and FT-IR. Thermal and electrochemical properties were analyzed via TGA, DSC, EIS, and LSV.