A novel Li+‐conducting polymer membrane gelled by fluorine‐free electrolyte solutions for Li‐ion batteries
Gel polymer electrolytes (GPEs), composed of poly(vinylidene fluoride) (PVdF), a ternary solvent of ethylene carbonate: propylene carbonate: dimethyl carbonate, and LiBOB, which are characterised by a novel composition with a fluorine‐free lithium salt, are here proposed. GPEs were firstly prepared through a solution casting procedure using the ternary carbonate solution as a solvent (named ex‐situ prepared membranes), and then activated by being immersed in a 0.7 M LiBOB‐carbonate solution.