A Facile Approach to Fabricate Self‐Standing Gel‐Polymer Electrolytes for Flexible Lithium‐Ion Batteries by Exploitation of UV‐Cured Trivalent/Monovalent Acrylate Polymer Matrices

Abstract

AbstractA facile approach to fabricate a self‐standing GPE for flexible lithium‐ion batteries is demonstrated using a UV‐cured trivalent/monovalent acrylate polymer matrix and a liquid electrolyte. The polymer matrix is successfully synthesized with the co‐presence of the liquid electrolyte by UV polymerization of ETPTA, which has trivalent vinyl groups, and EGMEA, which contains monovalent vinyl groups, with the ETPTA/EGMEA ratio fixed at 90/10 (wt%/wt%). The ETPTA/EGMEA matrix shows a lower Tg than the ETPTA matrix alone, which helps improve the mechanical flexibility and ionic transport of the resulting GPE. These features of the ETPTA/EGMEA‐based GPE, together with its superior interfacial compatibility towards electrodes, play crucial roles in obtaining a better cell performance compared to the ETPTA‐based GPE.