| 초록 |
Solid electrolyte-based lithium-ion batteries (LIBs) have enormous potential to replace conventional LIBs with flammable liquid electrolytes. However, solid electrolytes show low ionic conductivity and poor interfacial properties with electrodes, preventing them from reaching the level of conventional liquid electrolyte systems. Herein, we optimized the formation of an ion-conductive pathway in a UV-cured solid polymer electrolyte (USPE) via a semi-interpenetrating polymer network with a minimal liquid content. The USPE consists of a UV-curable hard matrix as a backbone film and an optimized ionic channel with an ion-solvated gel polymer (Li+/PVdF-HFP) for boosting the Li+ conduction. Gel polymer film provides high ionic conductivity and a stable electrochemical window. Going another step forward, both the PVdF-HFP/ETPTA ratio and the HFP content in the PVdF-HFP are critical gel polymer additives for reinforcing Li+ ion pathways in USPE. |
