▎ 摘　　要

NOVELTY - The piece has a current collector provided with a first edge region, a second edge region and a middle region. A first coating layer is provided with a first part and a second part. A second coating layer is provided with an active material. A first bonding force is provided between the first part and the first edge region. A second bonding force is provided between the second part and the second edge region. A third bonding force is provided between the second coating layer and the middle region, where a first conductive agent comprises conductive carbon black, carbon nanotubes, conductive graphite, graphene, acetylene black, or carbon nanofibers. A first binder comprises polyvinylidene fluoride, copolymer of vinylidene fluoride-fluorinated olefin, polyvinyl pyrrolidone, polyacrylonitrile, polymethyl acrylate, polytetrafluoroethylene, sodium carboxymethyl cellulose, styrene-butadiene rubber, polyurethane, fluorinated rubber or polyvinyl alcohol. USE - The piece is useful for an electronic device (claimed). ADVANTAGE - The piece improves electrical performance and safety performance of electrochemical device while reducing influence on volumetric energy density of electrochemical device. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for an electrochemical device. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the pole piece.