▎ 摘　　要

NOVELTY - The method of preparing graphene, comprises activating carbon atom of three-dimensional porous carbon material using hydrogen plasma with high activity, where the carbon with high activity captures the carbon atom provided by the external carbon source to grow into three-dimensional porous graphene, and converting the three-dimensional porous graphite and/or three-dimensional porous amorphous carbon into three-dimensional porous graphene. The graphene is powder or film. USE - The method is useful for preparing graphene for three-dimensional porous carbon material, which is useful in a solar battery, a super-capacitor and a lithium ion battery. ADVANTAGE - The method is useful for preparing graphene with high quality and conductivity and without any damage. DETAILED DESCRIPTION - The method of preparing graphene, comprises activating carbon atom of three-dimensional porous carbon material using hydrogen plasma with high activity, where the carbon with high activity captures the carbon atom provided by the external carbon source to grow into three-dimensional porous graphene, and converting the three-dimensional porous graphite and/or three-dimensional porous amorphous carbon into three-dimensional porous graphene. The graphene is powder or film. The graphene is prepared in the form of powder by adding powder-shaped three-dimensional porous carbon material in an atmosphere furnace, pumping vacuum to 10-20 Pa, filling hydrogen in the flow rate of 2-40 SCCM, activating the hydrogen through radio frequency at 800-1200 degrees C, where the radio frequency power is 100-600 W, filling carbon source after 10-30 minutes, reacting for 20-60 minutes, removing the plasma, stopping heating, cooling to room temperature, and stopping filling carbon source to obtain three-dimensional porous graphite. The graphene is prepared in the form of film by adding three-dimensional porous amorphous carbon film material in the atmosphere furnace, pumping vacuum to 2-20 Pa, filling hydrogen in the flow rate of 10-40 SCCM, activating the hydrogen through radio frequency at 900-1200 degrees C, where the radio frequency power is 100-600 W, filling carbon source after 5-20 minutes, reacting for 10-60 minutes, removing the plasma, stopping heating, cooling to room temperature, stopping filling carbon source, and obtaining the three-dimensional porous graphene. A three-dimensional porous amorphous carbon film material is prepared by mixing analytically pure ethyl orthosilicate, absolute ethanol, ammonia water with mass percent of 20-30% and de-ionized water under room temperature according to the volume ratio of 1:10:0.2:0.1, continuously stirring for 1-6 hours to obtain a mixture, adding organic solution with volume ratio of 10-20% and mass concentration of 5-30% to the mixture, stirring for 1-3 hours, aging the mixture for 2-5 days, refluxing for 2-12 hours at 60-90 degrees C to obtain the organic substance/silicon dioxide precursor sol, preparing quartz plate into a transparent film layer of silicon dioxide/organic substance in the speed of 5-20 mm/minutes using the pull plating technology, where the thickness is 20-200 nanometers, putting the transparent film in an oxygen-free atmosphere furnace, preserving heat for 30-90 minutes at 800-1000 degrees C, and carbonizing to obtain the three-dimensional porous amorphous carbon film material. Hydrogen is activated and hydrogen plasma is formed using radio frequency. The three-dimensional porous carbon material comprises amorphous carbon ball, three-dimensional mesoporous carbon, three-dimensional macro-porous carbon material, three-dimensional graphite foam, commercial graphite paper and/or three-dimensional graphite oxide sponge. The carbon source is gas carbon source, liquid carbon source and/or solid carbon source. A volume content of the carbon source is 0.6-6%. The pressure of the plasma activating carbon atom is 2-20 Pa. An INDEPENDENT CLAIM is included for a three-dimensional porous graphene.