POS6-0868
Imidazolium-Functionalized Polyethylenimine as an Additive for PEO-based Solid Electrolytes toward Enhance All-Solid-State Battery Performance
When and Where
Nov 30, -0001
12:00am - 12:00am
Presenter(s)
Minseo Kim (Chonnam National University)
Co-Author(s)
Abstract
All-Solid-State Lithium Metal Batteries (ASSLBs) are promising candidates for next-generation energy storage systems due to their exceptional safety and high energy density, fundamentally eliminating the leakage and fire hazards inherent in conventional liquid electrolytes. Among various solid polymer electrolytes (SPEs), poly(ethylene oxide) (PEO)-based matrices have been extensively investigated owing to their flexibility and high lithium-salt solubility. However, PEO-based SPEs suffer from high crystallinity that restricts segmental chain motion. Moreover, lithium dendrite growth induced by non-uniform current density distribution at the lithium anode interface remains a critical challenge, often leading to catastrophic short circuits during cycling.
In this study, we synthesized a polyethylenimine-Imidazolium (PIm) additive via an anionic ring-opening reaction, incorporating imidazolium groups into the amine-rich backbone of branched polyethylenimine (b-PEI). When integrated into the PEO matrix, the PIm additive acts as an anion receptor, altering the lithium-ion transport mechanism. The positive charges (N+ TFS I- LiTFSI L i+
Consequently, the PIm-incorporated electrolyte achieves an elevated lithium-ion transference number (tLi+
In this study, we synthesized a polyethylenimine-Imidazolium (PIm) additive via an anionic ring-opening reaction, incorporating imidazolium groups into the amine-rich backbone of branched polyethylenimine (b-PEI). When integrated into the PEO matrix, the PIm additive acts as an anion receptor, altering the lithium-ion transport mechanism. The positive charges (
Consequently, the PIm-incorporated electrolyte achieves an elevated lithium-ion transference number (
