IMPEDANCE STUDY ON THE REACTIVITY OF GEL POLYMER ELECTROLYTES TOWARDSA LITHIUM ELECTRODE

Impedance tests have been run, during a 10-day storage, on lithium ele ctrodes in contact with carbonate-based liquid electrolytes and gel po lymer electrolytes formed by immobilizing the former in poly(acrylonit rile) (PAN) and poly(vinyl chloride) (PVC) matrices. The polymer elect rolytes show higher resistances of the passivation layer and during th e 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.