▎ 摘　　要

NOVELTY - Preparing nitrogen and phosphorus co-doped graphene comprises grinding and mixing the biomass raw material with phosphate, carrying out low temperature carbonization under the protection of inert gas, carrying out high temperature graphitization, after heating and cooling process, soaking the obtained product in hydrochloric acid solution for a period of time, filtering the product, repeatedly washing with de-ionized water to neutral, and then cleaning by ethanol, finally drying to obtain the product. USE - Method for preparing nitrogen and phosphorus co-doped graphene, which is useful in lithium ion battery. ADVANTAGE - The method solves the problem that the nitrogen and phosphorus co-doped graphene in the prior art is produced by hydrothermal method, the device dependency is strong, and it is not suitable for industrial production.