A solid polymer electrolyte comprising a composite of (a) a polymer comprising 2-(meth)acryloyloxyethylcarbamic acid ester and (b) an electrolyte salt, which has a high ionic conductivity and can be made into a thin film. The present invention is also directed to an electrode comprising the solid polymer...http://www.google.co.uk/patents/US5597661?utm_source=gb-gplus-sharePatent US5597661 - Solid polymer electrolyte, battery and solid-state electric double layer capacitor using the same as well as processes for the manufacture thereof
