Cathode material, and preparation method and application thereof
A technology of negative electrode materials and mixed materials, which is applied in the field of battery materials, can solve the problems of increasing material preparation costs, consuming energy and environment, and cumbersome methods and processes, and achieves the effects of improving electrochemical performance, solving agglomeration, and improving electrical conductivity
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Embodiment 1
[0074] A kind of preparation method of negative electrode material comprises the steps:
[0075] (1) Put nano-silica powder with a diameter of 20nm, carbon nanotubes with an aspect ratio of 100, and natural graphite with a size of 10 μm in a ball mill jar at a ratio of 0.3:0.2:0.5 to obtain a mixed material. According to the mixed material Put the ball milling beads in a ratio of 1:20 to the ball milling beads, planetary ball milling at a speed of 350rpm for 4h, and then disperse the mixed material in ethanol for 20 minutes according to the mass ratio of the mixed material to ethanol as 1:30 Obtain the dispersion liquid, pour the dispersion liquid into the reaction kettle, the volume of the dispersion liquid accounts for 20% of the reaction kettle volume;
[0076] (2) Fill the reactor with dry ice and seal it immediately, put the reactor into an ultrasonic generator with a water temperature of 80°C, adjust the pressure inside the reactor to 12MPa, make the inside of the reacto...
Embodiment 2
[0084] A kind of preparation method of negative electrode material comprises the steps:
[0085] (1) Put silicon nanosheets with a size of 100nm, carbon nanotubes with an aspect ratio of 80, and artificial graphite with a size of 5 μm in a ball mill jar at a ratio of 0.5:0.2:0.3 to obtain a mixed material, and mix as described The ratio of the material to the ball milling beads is 1:25, put into the ball milling beads, planetary ball milling at a speed of 360rpm for 10h, and then disperse the mixed material in ethanol for 20 hours according to the mass ratio of the mixed material to ethanol as 1:15. The dispersion liquid is obtained in 1 minute, and the dispersion liquid is poured into the reactor, and the volume of the dispersion liquid accounts for 15% of the volume of the reactor;
[0086] (2) Fill the reactor with dry ice and seal it immediately, put the reactor into an ultrasonic generator with a water temperature of 60°C, adjust the pressure inside the reactor to 10MPa, ...
Embodiment 3
[0089] A kind of preparation method of negative electrode material comprises the steps:
[0090](1) Put nano-silicon powder, carbon nanotubes and natural graphite into the ball milling jar according to the ratio of 0.3:0.2:0.5 to obtain the mixed material, and put the ball milling beads into the ball milling bead according to the ratio of the mixed material and ball milling beads at 1:30 , planetary ball milling at a speed of 380rpm for 15h, and then according to the mass ratio of the mixed material to ethanol as 1:25, the mixed material was dispersed in ethanol and ultrasonically obtained for 20 minutes to obtain a dispersion, and the dispersion was poured into the reactor Among them, the volume of the dispersion accounted for 10% of the volume of the reactor;
[0091] (2) Fill the reactor with dry ice and seal it immediately, put the reactor into an ultrasonic generator with a water temperature of 60°C, adjust the pressure inside the reactor to 10MPa, make the inside of the ...
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