Impedance study on the reactivity of gel polymer electrolytes towards a lithium electrode

Impedance tests have been run, during a 10-day storage, on lithium electrodes in contact with carbonate-based liquid electrolytes and gel polymer electrolytes formed by immobilizing the former in poly (acrylonitrile) (PAN) and poly(vinyl chloride) (PVC) matrices. The polymer electrolytes show higher resistances of the passivation layer and during the charge transfer process. It is suggested that this may stem from the reaction of lithium with the −CN group of PAN and the −Cl atom of PVC, because of their electron-acceptor characteristics.