▎ 摘　　要

NOVELTY - Sub layer graphene comprises multi-layer sheet-shaped graphene and diamond. The diamond is located between two adjacent layer of multilayer graphene sheet. The diamond with the multi-layer sheet of graphene carbon atoms, where the weight ratio of multilayer graphene sheet and diamond is 18-19:1, the multi-layer graphene sheet is 3-5 layers of graphene sheet, the thickness of each layer of the multilayer sheet-shaped graphene is 0.2-0.5nm, distance between two adjacent layers of the multilayer sheet of graphene layer is 0.2-0.4 nm. USE - The grapheme is useful in lithium ion battery (claimed). ADVANTAGE - The method reduces energy consumption. The graphene increases the battery life and material conductivity. DETAILED DESCRIPTION - Sub layer graphene comprises multi-layer sheet-shaped graphene and diamond. The diamond is located between two adjacent layer of multilayer graphene sheet. The diamond with the multi-layer sheet of graphene carbon atoms, where the weight ratio of multilayer graphene sheet and diamond is 18-19:1, the multi-layer graphene sheet is 3-5 layers of graphene sheet, the thickness of each layer of the multilayer sheet-shaped graphene is 0.2-0.5nm, distance between two adjacent layers of the multilayer sheet of graphene layer is 0.2-0.4 nm, the diamond carbon is spherical and particle size of spherical carbon is 0.7-1.6 nm. An INDEPENDENT CLAIM is also included for preparing sub-layer graphene, comprising (i) adopting chemical deposition method for preparing multi-layer graphene sheet and depositing a layer of nickel metal layer on surface of silicon dioxide substrate by cathode ray, where the thickness of the nickel metal layer is 200-400 nm, (ii) introducing the mixture of methane, hydrogen, ammonia gas and ordinary graphite powder into the tubular furnace at 950-1150 degrees C, cooling quickly to room temperature within 100 ms to obtain multi- layer graphene sheet, where the layer number of the multilayer sheet-shaped graphite alkene is 3-12 layer, step (iii) observing more than hundred thousand grades cleanliness environment through an electron microscope after molecular knife for peeling off the 3-5 layer graphene sheet and step (iv) mixing peeled 3-5 layer sheet of graphene obtained in step (iii) and diamond, vacuumzing at 600-800 degrees C under 100-200Pa and stirring for 34-38 hours.