▎ 摘　　要

NOVELTY - Electrolytically preparing high intrinsic degree graphene comprises e.g. (1) pressing graphite material into graphite sheet by tableting apparatus, where the graphite material is flake graphite, graphite powder, and/or graphite foil, the thickness of the sheet is 2-5 mm, taking it as the anode reactant-A during electrolysis; selecting the platinum electrode as the cathode during electrolysis; selecting sulfate as the electrolyte, and formulating 0.1-3 mol/l as the sulfate solution-B; where the sulfate is ammonium sulfate, ammonium hydrogen sulfate, sodium sulfate, sodium hydrogen sulfate, potassium sulfate, and/or potassium hydrogen sulfate; further adding aqueous ammonia to the solution-B to adjust the pH of the solution-B to 8-14, and uniformly mixing the mixed solution to obtain alkaline electrolyte solution-C; and (2) placing the electrolyte device in constant temperature environment of 0-5 degrees C, using reactant-A as anode. USE - The method is useful for electrolytically preparing high intrinsic degree graphene. ADVANTAGE - The method: uses easily available raw materials which are economical; and is suitable for large-scale industrial production. DETAILED DESCRIPTION - Electrolytically preparing high intrinsic degree graphene comprises (1) pressing graphite material into graphite sheet by tableting apparatus, where the graphite material is flake graphite, graphite powder, and/or graphite foil, the thickness of the sheet is 2-5 mm, taking it as the anode reactant-A during electrolysis; selecting the platinum electrode as the cathode during electrolysis; selecting sulfate as the electrolyte, and formulating 0.1-3 mol/l as the sulfate solution-B; where the sulfate is ammonium sulfate, ammonium hydrogen sulfate, sodium sulfate, sodium hydrogen sulfate, potassium sulfate, and/or potassium hydrogen sulfate; further adding aqueous ammonia to the solution-B to adjust the pH of the solution-B to 8-14, and uniformly mixing the mixed solution to obtain alkaline electrolyte solution-C; and (2) placing the electrolyte device in constant temperature environment of 0-5 degrees C, using reactant-A as anode, using the platinum electrode as the cathode, using solution-B as the electrolyte solution, stably maintaining for 1-3 hours under the DC voltage of 2.5-3.5 V; transferring the electrode to the alkaline electrolyte solution-C, where the voltage is stable at 5-15 V, continuously electrifying for 0.5-1.5 hours, obtaining precipitate at bottom of the solution-C.