Patent ID: 7303594
Filing Date: 2007-12-04
Classification: H01M,Y02E,Y10T

Abstract:
1. A method of making a cathode for a battery, comprising (a) coating a first cathode mixture comprising a first electrode active material, a first binder, and a first solvent onto a first substrate removing only a portion of the first solvent after coating the first cathode mixture, and then removing the first substrate to provide a first cathode layer including at least the first electrode active material, some of the first solvent, and the first binder, but no substrate, and; (b) coating a second cathode mixture comprising a second electrode active material, a second binder, and a second solvent onto a second substrate, removing only a portion of the second solvent after coating the second cathode mixture, and then removing the second substrate to provide a second cathode layer including at least the second electrode active material, some of the second solvent, and the second binder, but no substrate; (c) layering the first cathode layer including at least the first electrode active material, some of the first solvent, and the first binder, but no substrate onto the second cathode layer including at least the second electrode active material, some of the second solvent, and the second binder, but no substrate to provide a cathode stack; and (d) bonding a current collector to the cathode stack to provide the cathode.