▎ 摘　　要

NOVELTY - Preparation of macro-graphene-modified carbon felt electrode material involves soaking a dried carbon felt in an acid solution, ultrasonically vibrating, washing the obtained carbon felt with deionized water, drying, placing dried carbon felt on a graphite uniform heating sample table at the bottom of a preparation chamber, aligning the sample in the direction of a gas outlet at the top of the preparation chamber, opening a hydrogen valve on the preparation chamber, cleaning, closing the hydrogen valve, then opening a methane valve on the preparation chamber, cleaning, closing the methane valve, then opening a high-vacuum valve on the preparation chamber, vacuuming, closing the high-vacuum valve, then opening the hydrogen valve, adjusting the gas flow rate to 150-200 sccm, heating the preparation chamber, then opening the methane valve, adjusting gas flow to 20-30 sccm, then closing the CH4 valve, maintaining hydrogen flow at 150-200 sccm, cooling, and closing the hydrogen valve. USE - Preparation of macro-graphene-modified carbon felt electrode material used for all-vanadium redox flow battery. ADVANTAGE - The method enables economical and mass preparation of macro-graphene-modified carbon felt electrode material with high electroconductivity and specific surface area, and excellent electrochemical catalytic performance, superior chemical stability, all-vanadium redox flow battery performance, by simple and environmentally-friendly process. DETAILED DESCRIPTION - Preparation of macro-graphene-modified carbon felt electrode material involves soaking a dried carbon felt in an acid solution at room temperature for 12-18 hours, then ultrasonically vibrating for 0.5-1.5 hour, repeatedly washing the obtained carbon felt with deionized water, drying, placing 20 cmasterisk20 cmasterisk5.5 mm dried carbon felt on a graphite uniform heating sample table at the bottom of a preparation chamber, aligning the sample in the direction of a gas outlet at the top of the preparation chamber, opening a hydrogen valve on the preparation chamber, cleaning for 1-3 minutes, closing the hydrogen valve, then opening a methane valve on the preparation chamber, cleaning for 1-3 minutes, closing the methane valve, then opening a high-vacuum valve on the preparation chamber, manually open a high-vacuum unit, vacuuming for 4-6 minutes until the vacuum in the preparation chamber is 2.5asterisk10-2 Pa to 3asterisk10-3 Pa, closing the high-vacuum valve, manually closing the high-vacuum unit, then opening the hydrogen valve, adjusting the gas flow rate to 150-200 sccm, heating the preparation chamber at 1000 plus minus 10 degrees C for 100-120 minutes, maintaining the temperature at 1000 plus minus 10 degrees C for 5-20 minutes, then opening the methane valve, adjusting gas flow to 20-30 sccm, maintaining the reaction time for 5-20 minutes, then closing the CH4 valve, maintaining hydrogen flow at 150-200 sccm, cooling the preparation chamber to room temperature, and closing the hydrogen valve.