▎ 摘　　要

NOVELTY - Preparing a nitrogen-sulfur doped graphene anode material by a low-temperature molten salt method involves dispersing and dissolving graphene oxide in deionized water at room temperature to form a dispersion, and dissolving a salt containing a sulfur source or a nitrogen source in deionized water in a mass ratio of 1:5-50 to obtain a salt solution. The salt solution is added to the graphene oxide dispersion, stirred at room temperature, and dried at 50-150 degrees C to obtain a compound. The compound is transferred to a tube furnace filled with inert gas, and heated to 150-500 degrees C at a temperature increase rate of 2-15 degrees C/minute for 1-24 hours. The product is taken out after cooling to room temperature with the furnace body, and the reaction is completed under sealed conditions. The obtained product is washed with deionized water, filtered, and dried to obtain the desired product. USE - Method for preparing nitrogen-sulfur doped graphene used as a negative electrode material for lithium ion batteries. ADVANTAGE - The method uses cheap and readily available industrial products as raw materials, avoids the use of high-temperature calcination, and has simple synthesis process, strong controllability, low cost, extensive raw materials, and batch preparation. The prepared nitrogen-sulfur double-doped graphene has high capacity and good cycle stability.