Aqueous graphene-based electric-conducting ink and preparation method thereof

[0023] The invention provides a kind of preparation method of water-based graphene-based conductive ink, which comprises the following steps:

[0024] S1, mix graphene microflakes, nano-scale superconducting carbon black, diluent, and second auxiliary agent, stir at a stirring speed of 200 rpm to 500 rpm for 5 minutes to 10 minutes, and then stir at 3000 rpm Disperse at a speed of ~4000 rpm for 30 minutes to 40 minutes to obtain a premix; wherein the diluent includes at least one of N-methylpyrrolidone, dipropylene glycol, N,N-dimethylethanolamine, propylene glycol butyl ether, and water;

[0025] S2, mixing the premix solution with carbon nanotubes, and dispersing at a speed of 300 to 500 rpm for 10 to 20 minutes to obtain a graphene-based composite slurry;

[0026] S3, mixing the graphene-based composite slurry with water-based resin, solvent and the first additive, and dispersing at a speed of 300 rpm to 500 rpm for 10 minutes to 20 minutes to obtain a water-based graphene-...

[0032] Preparation of the premix: Weigh 17.5g of graphene microchips into a container, then add 473.5g of distilled water, disperse at a speed of 700 rpm for 5 minutes, then add 30g of N-methylpyrrolidone, 5g of N,N-di Methylethanolamine was dispersed for 5 minutes at a speed of 700 rpm, and then 5g of nano-scale superconducting carbon black, 1g of BYK-190 dispersant, 1g of BYK-019 defoamer, and 3g of BYK-420 anti-rheological agent were added successively. Disperse at a speed of 3000 to 4000 rpm for 30 minutes to obtain a premix. Wherein the mass fraction of graphene in the premixed liquid is 3.5%, and the mass fraction of nanoscale superconducting carbon black is 1%.

[0033]Preparation of graphene-based composite slurry: Weigh 85g of the premixed solution in a container, then add 0.45g of carbon nanotubes, then add 14.5g of distilled water, and disperse for 10 minutes at a speed of 500 rpm to obtain a graphene-based composite slurry ; Wherein, the mass fraction of graphene ...

[0037] Preparation of the premix: Weigh 17.5g of graphene microchips into a container, then add 473.5g of distilled water, disperse at a speed of 700 rpm for 5 minutes, then add 30g of N-methylpyrrolidone, 5g of N,N-di Methylethanolamine was dispersed for 5 minutes at a speed of 700 rpm, and then 5g of nano-scale superconducting carbon black, 1g of BYK-190 dispersant, 1g of BYK-019 defoamer, and 3g of BYK-420 anti-rheological agent were added successively. Disperse at a speed of 3000 to 4000 rpm for 30 minutes to obtain a premix. Wherein the mass fraction of graphene in the premix liquid is 3.5%, and the mass fraction of nanometer superconducting carbon black is 1%.

[0038] Preparation of graphene-based composite slurry: Weigh 85g of the premixed solution in a container, then add 0.45g of carbon nanotubes, then add 14.5g of distilled water, and disperse for 10 minutes at a speed of 500 rpm to obtain the mass fraction of graphene. Slurry; Wherein, the mass fraction of graphen...