METHOD FOR PREPARING A POSITIVE ELECTRODE MATERIAL THROUGH EXTRUSION IN PRESENCE OF AN AQUEOUS SOLVENT, POSITIVE ELECTRODE OBTAINED THROUGH SAID METHOD, AND USES THEREOF

摘要

The present invention relates to a method for preparing a positive electrode that is made up of a composite material containing at least one active positive electrode made of iron and phosphate and at least one water-soluble polymer having ionic conduction properties in the presence of a lithium salt, said method comprising at least one step for mixing ingredients of the composite material through extrusion so as to obtain an extruded composite material and wherein said extrusion step is carried out by means of a co-kneader or extruder in the presence of an aqueous solvent and at a temperature from 20° to 95° C. The invention also relates to the positive electrode obtained according to said method, to the use of said electrode for manufacturing a lithium battery, and to the lithium battery having such electrode built therein. The electrode is particularly characterized in that it contains a level of active material greater than 60 wt %.