▎ 摘　　要

NOVELTY - Graphene modified lead cotton material comprises 90-99 wt.% lead metal and 1-10 wt.% graphene loaded nano silver, and the graphene modified lead cotton material prepared by using graphene-loaded nano silver as filler, and lead metal as substrate. USE - The graphene modified lead cotton material is useful for battery (claimed). ADVANTAGE - The graphene modified lead cotton material: improves large current charge-discharge and long cycle life of battery; reduces battery weight; and improves the battery performance with more reliable and more balanced. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing graphene modified lead cotton material, comprising (i) dispersing 2 g graphite powder having a particle diameter of 2-20 mu m into 300 ml dimethylformamide, ultrasonic dispersing for 2 hours, then centrifuging resulting mixture for 50-80 minutes at a rotation speed of 800-2000 revolutions per minute, and taking out supernatant i.e. graphene dispersion, (ii) adding silver nitrate into the graphene dispersion, preparing graphene-loaded nano silver by reduction of dimethyl formamide under stirring condition, dropping 1.2 g silver nitrate solution into the graphene dispersion solution obtained in step (i) at 50-60 degrees C, stirring for 3 hours, allowing to stand for 8 hours, then filtering using polyfluortetraethylene membrane, and washing with ethanol and acetone to obtain graphene-loaded nano silver, (iii) mixing uniformly lead powder and graphene loaded nano silver powder in a high speed mixer at a weight ratio of 99:1 to 90:10 to obtain a mixed powder, and (iv) melt extruding the mixed powder to obtain final product.