Abstract
A large-scale use of polymeric solid electrolytes in electrochemical devices calls for new materials with high conductivity, thermal and electrical stability over charge-discharge cycles, good mechanical properties, compatibility with the electrodes, high current densities. Modern preparation techniques like sol-gel allow us to explore new classes of composite materials like glass-polymers. We present sol-gel synthesis, electrical and thermal characterization of a new solid electrolyte based on a matrix made with poly(ethylene oxide) and glassy lithium triborate, which has been doped with lithium salts. We obtained a conductivity at room temperature ~ 10 −5ohm −1cm −1, which allows us to envisage some useful technological applications in electrochemical devices.
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