▎ 摘　　要

NOVELTY - Preparing highly dispersible graphene composite slurry involves: (1) weighing nanoporous carbon powder, single-layer graphene oxide, nano-carbon nitride, nano-calcium carbonate, nano cellulose, epoxy resin and organic solvent; (2) adding above components expect epoxy resin and solvent to a plasma cleaning machine for surface modification to obtain corresponding modified components; (3) preparing corresponding composite modified components; (4) mixing epoxy resin and organic solvent to obtain a mixed solution; (5) stirring and mixing mixed solution with the corresponding composite modified components, and ultrasonically treating to obtain composite dispersions (A)-(E); and (6) mixing dispersions (A) and (B), ultrasonically treating to obtain a composite slurry (a), adding dispersion (C), ultrasonically treating to obtain a composite slurry (b), adding dispersion (D), ultrasonically treating to obtain a composite slurry (c), adding dispersion (E), and ultrasonically treating. USE - The method is useful for preparing highly dispersible graphene composite slurry used for lithium battery. ADVANTAGE - The method effectively improves the uniform dispersion performance of the graphene composite slurry, and improves the stability of the composite slurry under different temperature and pH working environments after coating, thus ensuring the working performance of lithium battery. DETAILED DESCRIPTION - Preparing highly dispersible graphene composite slurry involves: (1) weighing raw materials including 1.12-1.26 wt.% nanoporous carbon powder, 1.24-1.36 wt.% single-layer graphene oxide, 0.35-0.43 wt.% nano-carbon nitride, 0.38-0.46 wt.% nano-calcium carbonate, 0.32-0.42 wt.% nano cellulose, 1.56-1.98 wt.% epoxy resin and remaining organic solvent; (2) adding one-half of nanoporous carbon powder, single-layer graphene oxide, nano-carbon nitride, nano-calcium carbonate and nano cellulose to a plasma cleaning machine for surface modification treatment to obtain modified nano-porous carbon powder, modified single-layer graphene oxide, modified nano-carbon nitride, modified nano-calcium carbonate and modified nanocellulose; (3) mixing remaining amount of nanoporous carbon powder with the modified nanoporous carbon powder to obtain composite modified nano-porous carbon powder, mixing the remaining amount of single-layer graphene oxide with the modified single-layer graphene oxide to obtain composite modified single-layer graphene oxide, mixing remaining amount of nano-carbon nitride with the modified nano-carbon nitride to obtain composite modified nano carbon nitride, mixing remaining amount nano-calcium carbonate with the modified nano-calcium carbonate to obtain composite modified nano calcium carbonate, and mixing the remaining amount of nanocellulose with the modified nanocellulose to obtain composite modified nanocellulose; (4) mixing and stirring epoxy resin and organic solvent to obtain a mixed solution; (5) stirring and mixing one-fifth of the mixed solution with the composite modified nanoporous carbon powder, and ultrasonically treating for 30-40 minutes to obtain a composite dispersion (A), stirring and mixing one-fifth of the mixed solution with the composite modified single-layer graphene oxide, and ultrasonically treating for 30-40 minutes to obtain a composite dispersion (B), stirring and mixing one-fifth of the mixed solution with the composite modified nano-carbon nitride, and ultrasonically treating for 30-40 minutes to obtain a composite dispersion (C), stirring and mixing one-fifth of the mixed solution with the composite modified nano-calcium carbonate, and simultaneously ultrasonically treating for 30-40 minutes to obtain a composite dispersion (D), and stirring and mixing one-fifth of the mixed solution with the composite modified nanocellulose, and ultrasonically treating for 30-40 minutes to obtain a composite dispersion (E); and (6) mixing and stirring the dispersions (A) and (B), and ultrasonically treating for 40-50 minutes to obtain a mixed graphene composite slurry (a), adding the composite dispersion (C), mixing and stirring, and ultrasonically treating for 50-60 minutes to obtain a mixed graphene composite slurry (b), adding the composite dispersion (D), mixing and stirring, and ultrasonically treating for 60-70 minutes to obtain a mixed graphene composite slurry (c), adding the composite dispersion (E), mixing and stirring, and ultrasonically treating for 70-80 minutes.