▎ 摘　　要

NOVELTY - Composite pole piece comprises a current collector and an active material layer (2) arranged on one side of the current collector. A functional layer (3) is provided on the side where the active materials layer is located, and the functional layer includes a functional additive and a combination of a first agglomerant and a first lubricant. USE - The composite pole piece is useful for secondary battery. ADVANTAGE - The composite pole piece: has high pressure solid density and high energy density, and has good electrolyte wetting property, low internal resistance and long service life; adopts the addition of the functional additive to reduce the irreversible capacity loss of the pole piece in the first cycle process and improves the safety performance of the battery; adopts the addition of the first lubricant, which is good for fully agglomerant; can reduce the sticking roller phenomenon and improves the pressure film quality of the electrode sheet. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: preparing the composite pole piece; and a secondary battery. DESCRIPTION OF DRAWING(S) - The drawing shows the structure schematic diagram of the composite pole piece 1Aluminum foil 2Anode active material layer 3Functional layer