METHOD AND APPARATUS FOR MAKING POSITIVE ELECTRODE FILMS FOR POLYMER BATTERIES

摘要

A method and an apparatus for making a positive electrode film having a thickness of less than 50µm. The method comprises the steps of compounding in an extruder a composite positive electrode mixture of active cathode material, an electronically conductive additive, and an ionically conductive polymer electrolyte; extruding the composite positive electrode mixture through a sheet die into a film having a thickness of more than 50µm; and reducing the thickness of the extruded film through at least one pair of nip rollers to obtain a composite positive electrode film having a thickness less than 50µm.