Composite current collector, electrode plate, secondary battery, and electric apparatus

Abstract

A composite current collector, an electrode plate, a secondary battery, and an electric apparatus are provided. The composite current collector includes a substrate layer, a bonding layer, and a metal layer. The substrate layer includes a first surface and a second surface opposite each other. The first surface and/or the second surface is provided with the bonding layer and the metal layer. The bonding layer is located between the substrate layer and the metal layer. The metal layer includes a metal seed layer and a metal thickening layer. The metal seed layer is located between the bonding layer and the metal thickening layer. In the composite current collector, designing the structure of the current collector allows for a good bonding force between the metal layer and the substrate layer and also enables the metal layer to have an appropriate thickness.

Dependencies are inferred from the claim text.