▎ 摘　　要

NOVELTY - Composite current collector comprises a base material and a coating set on at least one surface of the base material. The coating comprises an adhesive and a first additive. The first additive is distributed in the adhesive in the form of particles. USE - Composite current collector for secondary battery and electric device. ADVANTAGE - Because the first additive is distributed in the adhesive in the form of particles, the surface roughness of the coating layer is improved, so as to increase the current collector to the riveting force and adhesive strength of the pole piece, and improve the circulation performance of the secondary battery. The common current collector bottom coating is improved to improve the bonding force between current collector and active layer, inhibiting the influence of active material charging and discharging volume change to current collector adhesion, and improving the cycle life of the battery and the capacity retention rate. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) a secondary battery; (2) an electric device; and (3) an electric device, comprising the secondary battery. DESCRIPTION OF DRAWING(S) - The drawing shows a structure schematic diagram of the first additive forming a rugged interface on the surface of the coating. (Drawing includes non-English language text).