▎ 摘　　要

NOVELTY - Preparing carbon nanosheet material comprises adding organic polymer to 1-3 mole/l of sodium hydroxide solution and then washing with ethanol and deionized water and drying, mixing the dried mixture with an inorganic compound under an protection of nitrogen and then pre-activating at 250-450 degrees C for 1-4 hours, boiling at 600-900 degrees C, carbonizing for 2-6 hours, secondarily activating the carbonized mixture to obtain carbon material and then immersing with hydrochloride solution at 50-80 degrees C for 6-48 hours, cooling, filtering, washing with water and drying. USE - The method is useful for preparing carbon nanosheet material, which is useful in graphene sheet structure in supercapacitor electrode materials (claimed). ADVANTAGE - The method is capable of simply preparing carbon nanosheet material in an economical manner with good stability, high specific capacitance, good electrochemical performance and high efficiency. DETAILED DESCRIPTION - Preparing carbon nanosheet material comprises adding organic polymer to 1-3 mole/l of sodium hydroxide solution and then washing with ethanol and deionized water and drying, mixing the dried mixture with an inorganic compound under an protection of nitrogen and then pre-activating at 250-450 degrees C for 1-4 hours, boiling at 600-900 degrees C, carbonizing for 2-6 hours, secondarily activating the carbonized mixture at 200-300 degrees C for 1-3 hours to obtain carbon material and then immersing with hydrochloride solution at 50-80 degrees C for 6-48 hours, cooling, filtering, washing with water and drying. The organic polymer is phenolic resin, ion exchange resin or urea-aldehyde resin. The inorganic compound is potassium hydroxide, calcium hydroxide, zinc chloride or ammonium chloride.