“…Poly(ethylene oxide), PEO, based solid-state electrolytes are highly advantageous because of their easy fabrication, mechanical robustness, thermal stability, low interfacial resistivity, and good stability with Li metal. 9–12 However, the low ionic-conductivity (10 −6 S cm −1 ) of PEO-based electrolytes at room temperature caused by limited chain motions has restricted their operating temperature to 50–70 °C. 13,14 For enhancement of their room temperature ionic-conductivity, different approaches such as nanocomposite formation with active and passive inorganic nanofillers, plasticization, block co-polymerization and cross-linking have been investigated in detail.…”