Method for preparing lithium ion battery material
A lithium-ion battery and lithium battery technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of large irreversible capacity loss, poor cycle performance, large volume change, etc., and achieve the effect of improving pulverization and volume effect
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Embodiment 1
[0025] Mix high-purity graphene powder, sodium dodecylsulfonate, defoamer, polyvinyl alcohol and water according to the mass ratio of 0.2:0.2:0.002:0.05:55 and then disperse evenly by high-speed shearing method to obtain Viscous graphene slurry. Add polyacrylonitrile (PAN) powder with a mass fraction ratio of 2:30 to the graphene composite slurry to the above graphene slurry, and use ball milling to fully mix the added polyacrylonitrile and graphene powder to form stable suspension. The composite slurry obtained above was coated at 80°C and dried in a blast drying oven to become a solid, and the dried solid was placed in an oven under nitrogen protection and heated at 700°C for 5 hours for carbonization to obtain a graphene porous material. The obtained graphene porous material with a mass ratio of 1:3 is added to an aqueous solution, crushed and dispersed in a ball mill to form a uniform viscous substance, dried at low temperature and stored as a powder. The prepared graphe...
Embodiment 2
[0027] Mix high-purity graphene powder, sodium cetyl sulfonate, defoamer, chitosan and water according to the mass ratio of 1:0.2:0.002:0.05:60 and then disperse evenly by ball milling to obtain viscous Thick graphene slurry. Add polyacrylonitrile (PAN) powder with a mass fraction ratio of 5:30 to the graphene composite slurry to the above graphene slurry, and use ball milling to fully mix the added polyacrylonitrile and graphene powder to form stable suspension. The composite slurry obtained above was coated at 70°C and dried in a blast drying oven to become a solid, and the dried solid was placed in an oven under nitrogen protection and heated at 800°C for 5 hours for carbonization to obtain a graphene porous material. Add the obtained graphene porous material with a mass ratio of 1:5 into an aqueous solution, grind and disperse it in a ball mill to form a uniform viscous substance, dry it at low temperature and store it as a powder. The prepared graphene porous material p...
Embodiment 3
[0029]Mix high-purity graphene powder, sodium cetyl phosphate, defoamer, water-soluble cellulose and water according to the mass ratio of 2:0.6:0.002:0.05:60 and then disperse evenly by ball milling to obtain Viscous graphene slurry. The polyaniline powder with a mass fraction ratio of 5:30 to the graphene composite slurry is added to the above graphene slurry, and the added polyaniline and graphene powder are fully mixed to form a stable suspension by ball milling. The composite slurry obtained above was coated at 50°C and dried in a blast drying oven to become a solid, and the dried solid was placed in an oven under nitrogen protection and heated at 800°C for 4 hours for carbonization to obtain a graphene porous material. The obtained graphene porous material with a mass ratio of 1:3 is added to an aqueous solution, crushed and dispersed in a ball mill to form a uniform viscous substance, dried at low temperature and stored as a powder. The prepared graphene porous material...
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