Quick-charging negative pole piece and preparation method thereof

The invention relates to a fast-charging negative pole piece and a preparation method thereof, which are used for solving the problems that the surface density and the size of each layer cannot be accurately controlled by the existing negative pole wet-method double-layer coating, a large amount of energy is consumed and the process threshold is relatively high due to solvent drying and the like. The preparation method mainly comprises the steps of first-stage powder mixing, second-stage powder mixing, bottom layer fibrillation, copper foil surface treatment, copper foil-bottom layer compounding, surface layer electric spraying, multi-stage rolling and the like. The preparation process of the dry method route is simplified, and no solvent participates, so that the tedious pole piece baking process is avoided. The preparation route of the double-layer electrode adopts a mode of first bottom layer and second layer, so that the surface density and size of each layer can be accurately controlled, and different st