▎ 摘　　要

NOVELTY - A graphene sheet, containing 3-30 layers of graphene. The maximum straight-line distance between any two points on the periphery of the graphene sheet is 100-500 nanometers. USE - Graphene sheet is used for positive electrode and battery e.g. lithium ion battery system. Can also be used in heat conducting material and energy. ADVANTAGE - The graphene sheet has small size, flat surface, wrinkle and curling phenomenon, few carbon-containing oxygen group, good conductive performance, and improved lithium ion battery internal resistance, compacting density and energy density, and characteristics temperature cycle performance. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: a preparation method of graphene sheet conductive paste material; a graphene sheet conductive paste; a kind of positive electrode; and a battery. DESCRIPTION OF DRAWING(S) - The drawing shows a process model of the nano-carbon fibre by grinding shearing separating the graphene sheet.