▎ 摘　　要

NOVELTY - A nitrogen-doped graphene nanomaterial is prepared by mixing sulfur nitrogen precursor and graphene oxide at a mass ratio of 3-0.5:1, adding ethanol and ultrasonically dispersing uniformly at 40-90 degrees C to obtain graphene oxide and nitrogen precursor compound. The precursor compound is treated at high temperature of 800-1000 degrees C for 1-5 hours under protection of inert gas and cooled naturally to room temperature to obtain the nitrogen-doped graphene nano material, where the sulfur-nitrogen precursor is thiourea, amino thiourea, sulfur nitrogen, methionine or cysteine. USE - Nitrogen-doped graphene nanomaterial for use as multifunctional interlayer material in lithium-sulfur battery (claimed). ADVANTAGE - The nanomaterial is prepared with low cost, two-dimensional structure, improved conductivity of the sulfur cathode and the protection of the integrity of the diaphragm under high current, and applicability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a utilization of the nitrogen-doped graphene nanomaterial as multifunctional interlayer material in lithium-sulfur battery.