An improved composite polymer electrolyte for lithium metal batteries

We have demonstrated that PEG-based polymer electrolytes prepared by solvent-free procedures and with the addition of particle-size ceramic powder have very stable lithium interface properties--a very important feature for the development of successful lithium metal polymer batteries (LPBs). The results of cyclability tests at different charge-discharge rates carried out on prototypes of LPBs assembled with the dry prepared PEO20-LiCF3SO3-20%w/w gamma LiAlO2 composite electrolyte and with a composite cathode based on LiMn2O4 spinel operating at 3V are reported and discussed.