▎ 摘　　要

NOVELTY - The multi-layer structure composite film has a layer of graphene film and a conformal layer of amorphous silicon. The graphene film comprises exfoliated graphene. The layer of graphene film is applied to a current collector substrate comprising copper. USE - Multilayer-structure composite film used for multi-layered anode (claimed) used as electrode for rechargeable lithium ion battery for electric vehicles, hybrid electric vehicles and plug-in hybrid electric vehicles. ADVANTAGE - The multilayer-structure composite films, fabricated on copper current collectors, can be directly used as anodes for rechargeable lithium-ion batteries without the addition of polymer binders or conductive additives. Fabricated coin-type half cells based on the anode materials easily achieve a capacity almost four times higher than the theoretical value of graphite even after 30 cycles and have improved capacity retention and enhanced rate capability during charge/discharge processes compared to those of pure silicon film-based anodes. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following: (1) a multilayer composite anode used as electrode for lithium ion battery; and (2) a method for preparing a composite structure comprising a copper foil and one or more layers of a graphene film coated with a silicon film. DESCRIPTION OF DRAWING(S) - The drawing shows the perspective diagram of illustration of preparation procedures for the formation of the composite electrode by the repeated stacking of graphene followed by the deposition of a silicon layer.