The present invention provides a highly dispersed highly stable
high concentration and high yield
graphene dispersion liquid and a preparation method thereof, and relates to the preparation method of the
graphene dispersion liquid. The
graphene dispersion liquid concentration is 1mg / mL-60mg / mL, and the graphene dispersion liquid comprises 0 to 6% (by weight) of a dispersant; the graphene
diameter is 100-6000nm; the graphene yield is 40 %-99%; and the preparation method is a mechanical
grinding technique based on a ball or a rod or a segment as a media. The graphene dispersion liquid solves the poor dispersibility, low stability, low concentration, low yield and other problems of the graphene in water and other various organic solvents, and the graphene dispersion liquid is a black viscous
slurry, good in dispersion, has good stability, high dispersion concentration, and high production yield.