Solid polymer electrolytes: Interpenetrating polymer networks doped with lithium perchlorate

Solid state ionics has a key role to play in the field of modern electronic s. Solid electrolytes would not only make batteries leak proof, but also sp ace efficient, and having high power densities. In the present investigatio n, attempts were made to synthesize a new solid polymer electrolyte and cha racterize its electrical properties. An interpenetrating polymer network (I PN) of polyethylene oxide-polyurethane/poly(4-vinylpyridine) (PEO-PU/PVP), was synthesized as host polymer and subsequently doped with LiClO4. The IPN structure improves the mechanical properties. DSC studies showed an inward shift of glass transition temperature (T-g) in the range -50 degreesC to - 35 degreesC. Conductivity measurements showed a values in the range of 10(- 8)Scm(-1). The maximum conductivity (sigma) of the system (similar to5 x 10 (-8) Scm(-1)) was observed at EO/Li ratio in the range of 10-15. Impedance analysis showed interfacial polarization within the polymer matrix.