Ion-conductive polymethylmethacrylate gel electrolytes for lithium batteries

Polymer gel electrolytes based on PMMA were prepared by in situ polymerisation of methylmethacrylate, where solutions of inorganic and/or organic compounds in propylene carbonate can be used as an optional part incorporated in the gel. These elastic materials have suitable conductivity ca. 10−3 to 10−4 S cm−1, high optical transmittance and these properties are stable for weeks. Gels with lithium perchlorate and ferrocene-ferricinium redox couple were studied using impedance spectroscopy and cyclic voltammetry. The behaviour of glassy carbon in contact with the gels was studied by cyclic voltammetry and impedance spectroscopy.