▎ 摘　　要

NOVELTY - Method for manufacturing a graphene-coated object, involves: immersing an electrode and an object having an uneven surface in a solution including graphene oxide; applying bias voltage to the electrode and the object to deposit the graphene oxide having a substantially even thickness on the uneven surface of the object; and heating the graphene oxide deposited on the uneven surface of the object in a vacuum or a reducing atmosphere to reduce the graphene oxide to graphene. USE - The method is used for manufacturing a graphene-coated object which is an electrode of a lithium-ion secondary battery (claimed). The object is used as a negative electrode for secondary battery. The film-like carbon-based material is used as conductive additive in a negative electrode. The secondary battery is used for power supplies of a variety of electric appliances which can be operated with power, where the electric appliances include display devices, lighting devices, desktop personal computers and laptop personal computers, image reproduction devices which reproduce still images and moving images stored in recording media such as digital versatile discs (DVDs), mobile phones, portable game machines, portable information terminals, e-book readers, video cameras, digital still cameras, high-frequency heating appliances such as microwave ovens, electric rice cookers, electric washing machines, air-conditioning systems such as air conditioners, electric refrigerators, electric freezers, electric refrigerator-freezers, freezers for preserving DNA, dialyzers, moving objects driven by electric motors using power from secondary batteries, moving objects including electric vehicles, hybrid vehicles each including both an internal-combustion engine and an electric motor, and motorized bicycles including motor-assisted bicycles. ADVANTAGE - The object is prevented from being crushed, owing to sufficient flexibility of the graphene. The film-like carbon-based material improves lithium occlusion efficiency of a secondary battery. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for an electrode comprising an active material comprising silicon and an oxide, and a film-like carbon-based material on the active material, where the film-like carbon-based material includes sheets of graphene, or comprising a first active material comprising silicon and an oxide, a second active material comprising silicon and an oxide, and a film-like carbon-based material on the first active material and the second active material, where the film-like carbon-based material comprises graphene.