PVA-based Semi-IPN Polymer Electrolyte with UV-Initiated PEG-PVEC for Enhanced Ionic Conductivity and Mechanical Strength for Solid-state Lithium-ion Battey
발표자
이지연 (성균관대학교)
연구책임자
김덕준 (성균관대학교)
초록
내용
Lithium metal batteries (LMBs) are considered promising candidates for next-generation energy storage devices due to their high energy density for various applications. However, challenges such as dendrite formation and instability of the electrolyte need to be addressed. In this study, a semi-interpenetrating polymer network (semi-IPN) structure was introduced, incorporating a polyvinyl alcohol (PVA) matrix with UV-initiated polyethylene glycol monomethyl ether methacrylate (PEGMA), polyethylene glycol dimethacrylate (PEGDA), and vinyl ethylene carbonate (VEC). The resulting electrolyte demonstrates an ionic conductivity of 1.36×10⁻³ S cm⁻¹ and a tensile strength of 5.49 MPa, highlighting its potential for use in LMBs. These results show that UV-initiated semi-IPN-based polymer electrolyte enhances LMB performance by improving ionic conductivity and mechanical stability. In addition, the electrochemical stability window was measured by linear sweep voltammetry, and the interfacial compatibility with lithium metal was evaluated through lithium plating/stripping tests using lithium symmetric cells. This system offers a promising solution to safer and more efficient energy storage applications.