The invention discloses a preparation method of
graphene conductive
slurry. The preparation method comprises the following steps of 1) putting
graphene into NMP, and carrying out ultrasonic dispersiontreatment to obtain a
graphene dispersion liquid; 2) putting a carbon material into NMP, and carrying out
ultrasonic dispersion treatment to obtain a carbon material dispersion liquid; 3) mixing thegraphene dispersion liquid with the carbon material dispersion liquid, then adding superfine carbon
powder and superconductive
carbon black, and carrying out high-pressure homogenization treatment toobtain a
mixed solution; 4) adding PVDF into NMP to prepare a PVDF solution; and 5) adding the PVDF solution into the
mixed solution, stirring, and adjusting the
viscosity to obtain the graphene conductive
slurry. According to the method, graphene with excellent
thermal conductivity is adopted as a
raw material, so that the graphene conductive
slurry is endowed with excellent heat conduction performance, and when a battery is charged and discharged at a
high rate, rapid heat conduction can be achieved, and the situation that the local temperature of the battery is too high is avoided; and thegraphene conductive slurry can be used for remarkably reducing the
internal resistance of the battery, and improving the rate capability and the
cycling performance of the battery.