▎ 摘　　要

NOVELTY - Preparing thin-layer carbon-based material comprises (i) mixing melamine (C3H6N6) and ammonium chloride (NH4Cl) for 1 hour, dispersing into a certain volume of N, N-dimethylformamide (DMF) solution, stirring for 30 minutes to obtain milky white mixed solution, (ii) adding asphalt into the mixed solution, magnetically stirring for 6 hours, evaporating the DMF at 90℃ water bath, grinding to obtain the powder of asphalt coated melamine and ammonium chloride, and (iii) placing the obtained powder into the corundum crucible, transferring to the tubular furnace under the protection of argon gas to process temperature sintering annealing carbonization, naturally cooling to room temperature to obtain a thin carbon-based material of black ultra-thin wrinkle. USE - Preparing thin-layer carbon-based material used as potassium ion battery anode material in alkaline ion battery application. ADVANTAGE - The method is simple, easy to operate, low raw material cost, less equipment investment, and suitable for mass production. The prepared material has specific Raman absorption spectrum, so that the prepared thin-layer carbon-based material has a specific electrochemical parameters, the specific surface of 141.23m2g-1 with the graphene sheet layer with the shape of ultra-thin fold, the current density of 1000mA g-1, the charging and discharging cycle 1800 times, the discharge specific capacity is kept at more than 147.6mAh, and coulomb efficiency is more than 99.6% (claimed). DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a thin-layer carbon-based material.