▎ 摘　　要

NOVELTY - Preparing aqueous conductive paste based on nitrogen-doped graphene involves providing 5-10 wt.% weak alkali aqueous solution, phenolic resin precursor, silica precursor and directing agent, where the volume of the phenolic resin precursor does not exceed 10% of the volume of the weak alkaline aqueous solution, adding silica precursor and directing agent to the weak alkaline aqueous solution, performing first-stage ultrasound for 5-30 seconds, dropping phenolic resin precursor to the weak alkaline aqueous solution, performing continuously first-stage ultrasonic treatment, removing the silica, collecting the precipitate by centrifugation, drying, carbonizing the precipitation to obtain an nano-mesoporous sphere. USE - Method for preparing aqueous conductive paste based on nitrogen-doped graphene for use in in battery (claimed). ADVANTAGE - The prepared aqueous conductive paste can improve the multiplying power performance and the cycling stability of the battery. DETAILED DESCRIPTION - Preparing aqueous conductive paste based on nitrogen-doped graphene involves providing 5-10 wt.% weak alkali aqueous solution, phenolic resin precursor, silica precursor and directing agent, where the volume of the phenolic resin precursor does not exceed 10% of the volume of the weak alkaline aqueous solution, adding silica precursor and directing agent to the weak alkaline aqueous solution, performing first-stage ultrasound for 5-30 seconds, dropping phenolic resin precursor to the weak alkaline aqueous solution, performing continuously first-stage ultrasonic treatment, removing the silica, collecting the precipitate by centrifugation, drying, carbonizing the precipitation to obtain a nano -mesoporous sphere, providing, mixing N-methylpyrrolidone and the obtained nano-mesoporous sphere with mass ratio of 100:2-10, adding orderly Mxene, nitrogen-doped graphene and carbon nanotubes (CNTs), with mass ratio of 100:1-5:5-20:5-20, performing secondary ultrasound on the N-methyl pyrrolidone while adding the Mxene, the CNTs and the nitrogen-doped graphene, adding a fiber-forming polymer into the N-methyl pyrrolidone after the ultrasound is completed, transferring the mixture into an oil bath kettle at the temperature of 120-126degrees Celsius, stirring, mixing uniformly to obtain a spinning stock solution, performing electrostatic spinning, collecting and shearing by using a spinning needle with the inner diameter increased along the filament outlet direction to obtain a modified graphene fiber with the length of 0.2-10 mm, providing modified graphene fiber, conductive graphite, aqueous dispersant and deionized water, mixing into primary slurry, where the mass ratio of the modified graphene fiber, the conductive graphite and the aqueous dispersant is 50-100:2-5:0.2-2, transferring the primary slurry to a ball mill for ball milling for 5-20 minutes to obtain aqueous-based conductive slurry, where the Mxene is titanium carbide (Ti3C2) or Ti2C. An INDEPENDENT CLAIM is included for an aqueous conductive paste based on nitrogen-doped graphene, which comprises: a modified graphene fiber, a conductive graphite, an aqueous dispersant and deionized water, where the mass ratio of the modified graphene fiber to the conductive graphite to the aqueous dispersant is 50-100: 2-5: 0.2-2, and the mass fraction of the modified graphene fiber in the aqueous conductive paste based on nitrogen-doped graphene is 1-5 wt.%. DESCRIPTION OF DRAWING(S) - The drawing shows a test result of the magnification performance of the button cell. (Drawing includes non-English language text).