▎ 摘　　要

NOVELTY - Normal-temperature molten salt includes 58-70 mol% acetamide, 29.9-40 mol% urea or thiourea, and 0.1-2 mol% quaternary alkyl ammonium salt. USE - Normal-temperature molten salt. ADVANTAGE - The normal temperature molten salt has wide potential window, high conductivity, high peeling efficiency, low cost, environment-friendly, easy to dissolve in water, convenient for stripping graphene cleaning treatment, and can effectively improve the efficiency of cathode and anode double electrode synchronous preparation of graphene and reduce the production cost. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following: (1) a method for preparing a normal temperature molten salt with a wide potential window, which comprises mixing acetamide and urea or acetamide and thiourea evenly under heating to form a mixed solution, adding quaternary alkyl ammonium salt to the mixture, mixing under heating to obtain transparent liquid molten salt, adding water to the transparent liquid molten salt under stirring to obtain a room temperature molten salt with a wide potential window; and (2) a method for using normal temperature molten salt of wide potential window, which comprises using room temperature molten salt, placing two graphite electrodes in the electrolytic cell containing the electrolyte, loading the electrolytic cell with a voltage of 5-20V, peeling off for 2-100 hours, washing and dispersing into the solvent ultrasonically to obtain the graphene dispersion.