Patent ID: 8178241
Filing Date: 2012-05-15
Classification: H01M,Y02E,Y02P,Y10S

Abstract:
1. A method of making a current collector comprising: providing a metallic substrate; and applying to the substrate without a solvent present, a dry composition including carbon particles, a binder and buffing an effective amount of said particles on said substrate at a pressure normal to the surface of greater than 0 and less than about 30 g/cm2 using an applicator pad, said applicator pad moving in a plane parallel to said surface in a plurality of directions relative to a point on the surface such that a substantially uniform coating of said particles is provided, and wherein said particles have a Mohs' hardness between 0.4 and 3 and a largest dimension of less than about 100 microns, and wherein the substantially uniform coating has a maximum average thickness of less than about 100 nanometers with a variation in thickness of no more than 10%, and wherein the metallic substrate is selected from aluminum, copper, magnesium, nickel, tin, and alloys thereof.