Patent ID: 9034490
Filing Date: 2015-05-19
Classification: H01M,Y02E,Y02P

Abstract:
1. A multilayer material comprising: a solid support; and at least two superposed solid layers which contain particles of an electrochemically active material and a binder, the first solid layer adhering to the solid support and the second solid layer adhering directly to the first solid layer and wherein: at least one of the first and second solid layers has a thickness, measured using a scanning electron microscope method, constant to at least 95%; an average depth of penetration of the second solid layer into the first solid layer which is less than 10% of the thickness of the first solid layer; the binder in the first solid layer is of a different nature from the binder in the second solid layer; the binder present in one of the first and second layer is soluble at 25° C. in water with a concentration of greater than 1 g/liter, and is soluble at 25° C. in a solvent different from water with a concentration of less than 1 g/liter; and the binder present in the other of the first and second solid layer is soluble at 25° C. in water with a concentration of less than 1 g/liter, and is soluble at 25° C. in a solvent different from water with a concentration of greater than 1 g/liter; and the electrochemically active material in one of the first or second solid layers is selected from the group consisting of: Li