▎ 摘　　要

NOVELTY - Multifunctional composite paper comprises graphene and plant fibers as raw materials, where the mass of graphene is 0.5-15%. The preparation method comprises mixing graphene and plant fiber pulp, filtering and drying to obtain the composite paper. USE - The paper is useful for preparing conductors of super-capacitors, a lithium ion battery and an energy-storing device, as an electrode (claimed). ADVANTAGE - The method has simple preparation process, utilizes easily available plant fiber raw materials, and is convenient to control, economical and suitable for industrial production. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the multifunctional composite paper, comprising: (a) preparing the plant fiber paper pulp solution based on the normal preparation method; (b) adding graphene or graphene oxide into water containing surfactant or solution containing ethanol solvent to carry out ultrasound for 1-3 hours with an ultrasonic power of 45 W and an ultrasonic frequency of 80 kW to obtain graphene dispersion solution; (c) adding plant fiber pulp to uniformly mix for 0.5-5 hours with a revolving speed of 100-800 revolutions/minute to obtain the paper pulp mixture; and (d) vacuum extracting and filtering the pulp mixture for 15-60 minutes, drying at 20-90 degrees C for 6-10 hours, and forming the composite paper.