A Zwitterionic Double-Network Hydrogel Electrolyte Enabling High Ionic Conductivity and Cycle Stability for Flexible Zinc-Ion Batteries
발표자
이지섭 (경북대학교)
연구책임자
유지영 (경북대학교 )
초록
내용
Aqueous Zinc-ion batteries (ZIBs) have attracted increasing attention as next-generation energy storage devices due to their inherent safety, low cost, and environmental friendliness. However, practical applications are still limited by several challenges, including zinc dendrite formation, electrode corrosion, and poor electrochemical stability caused by the presence of free water in aqueous electrolytes. In this study, a double-network hydrogel electrolyte including a zwitterionic monomer was developed to suppress free water through sulfonate groups, thereby enhancing ion dissociation and electrolyte stability. The hydrogel electrolyte is designed based on a double 3D network structure formed by copolymerizing three key components. Double 3D network sturcutre can retain water molecules and thus provide high ionic conductivity. Additionally, hydrogel exhibits excellent adhesion and superior cycle stability, thereby satisfying the requirements for flexible devices.