Cathode including transition metal/matrix polymer composition and a secondary polymer battery therefrom

摘要

A secondary polymer battery is provided with:a) a cathode containing a current collector made of an electrically conductive substrate and a composition placed on said current collector, said composition including i) one or more transition metal compounds selected among a transition metal and transition metal salt of the formula MXn, wherein M is a transition metal, X is a halogen negative ion, and n is an integral number between 1 to 6; ii) a matrix polymer which has a basic functional group with affinity for the transition metal species;(b) a polymer electrolyte containing a lithium salt; and(c) an anode including the material selected among a lithium metal, a lithium alloy and a lithium intercalation material such as carbon. The secondary polymer battery has a high energy density and a high charging/discharging efficiency with extended cycle life.