▎ 摘　　要

NOVELTY - Preparing three-dimensional porous nitrogen-sulfur doped carbon nanosheet comprises slowly adding homogeneous solution containing trimeric thiocyanate to graphene oxide aqueous solution, dissolving, stirring at 50-120 degrees C, drying, placing in vacuum environment and allowing to stand at 300-500 degrees C for 1-3 hours, heating to 700-900 degrees C for 0.5-2 hours and passing in inert atmosphere and cooling. USE - The method is useful for preparing three-dimensional porous nitrogen-sulfur doped carbon nanosheet. ADVANTAGE - The nanosheet has good rate performance as lithium battery and sodium electrode, large specific surface area and multi-stage pore structure are easy to carry sulfur. The method is simple, easy to operate, economical and can realize large-scale preparation.