▎ 摘　　要

NOVELTY - Boron-nitrogen codoped graphene comprises graphene as lamellar pleated sheet structure, the number of layers in the sheet is 1-10 layers, the boron-doped content is 1-16.6 wt.%, and the nitrogen-doped content is 1-16.6 wt.%. USE - The codoped graphene is useful as oxygen-reduction catalyst under alkaline environment and as dielectric material (all claimed). ADVANTAGE - The codoped graphene: can be used as oxygen-reduction catalyst under alkaline environment, when the boron and nitrogen in para position, and as dielectric material, when the boron and nitrogen in ortho position (claimed); can regulate structure of doping elements in graphite crystal lattice; maintains the doping inherent characters of boron and nitrogen in separate state; and has good electrocatalysis material. The method: is simple and easy to implement; does not require a catalyst in the preparation process; can easily control the reaction process; and is suitable for large scale production. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the boron-nitrogen codoped graphene, comprising (a) uniformly mixing carbon, nitrogen and boron precursor and solvent, where the mol ratio of the carbon and nitrogen in the precursor is 1:5-1:120, and the mol ratio of carbon and boron in the precursor is 1:0.01:-1:1, (b) drying the resulting mixture at 60 degrees C, protecting under inert gas condition at 450-650 degrees C, and insulating for 0.5-24 hours, and (c) protecting the resulting product under an inert gas, further heating to 700-1100 degrees C, incubating for 0.5-24 hours, and cooling to room temperature.