▎ 摘　　要

NOVELTY - Preparation of graphene material involves exposing polymer to laser source and forming graphene. USE - Preparation of graphene material used for component of electronic device e.g. energy storage device and energy generation device chosen from supercapacitor, micro supercapacitor, pseudocapacitor, microbattery, lithium-ion battery, sodium-ion battery, magnesium-ion battery, electrode, conductive electrode, sensor, photovoltaic device, electronic circuit, fuel cell device, thermal management device and biomedical device (all claimed). ADVANTAGE - The method efficiently provides graphene material having excellent electrical conductivity and stability, by a simple process. The electronic device obtained using the graphene material has high power density and capacity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for separated graphene derived from polymer, which is obtained by separating graphene from the polymer.