▎ 摘　　要

NOVELTY - Preparing net-like nitrogen-doped graphene nano microchip comprises adding alkali metal organic salt in a calcining furnace, under the air atmosphere or an inert atmosphere, at 1-10 degrees C/minutes of heating speed, raising the temperature to 300-500 degrees C, maintaining the temperature for 0.5-2 hours, continuously heating up to 600-1200 degrees C at a heating speed of 1-10 degrees C/minutes, thermal insulating for 1-3 hours, cooling, crushing, washing using distilled water to remove residual salt, and drying to obtain the net-like nitrogen-doped graphene nano microchip. USE - The method is useful for preparing net-like nitrogen-doped graphene nano microchip (claimed). ADVANTAGE - The microchip has interpenetrating network structure, with diameter of each grid having hundreds of nanometer to a few microns, and the thickness of tens of nanometer; has good sodium/potassium ion battery cathode and excellent cycle and multiplying power performance.