A kind of silicon carbon negative electrode material slurry and preparation method thereof
A technology of negative electrode material and silicon carbon material, which is applied in the field of silicon carbon negative electrode material slurry and its preparation, can solve the problems of affecting the cycle life of the material, the powder drop of the pole piece, and the low conductivity, so as to alleviate the phenomenon of powder drop and improve the viscosity. The effect of knot strength and improved cycle performance
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Embodiment 1
[0022] (1) According to the mass ratio of 1:1, 1:2, 1:4, stir and dilute at 15°C for 6 hours to prepare LA132, LA133, and LA136D adhesives, and then mix the three diluted adhesives according to the ratio of 1:1:2. The binder is mixed, stirred at 15°C for 6 hours, and the prepared mixed binder is left to stand for later use;
[0023] (2) Add silicon carbon material and Super-P according to the mass ratio of silicon carbon material, conductive agent, and binder to 80:10:10 for dry mixing, and stir at a low speed of 50 rpm for 15 minutes;
[0024] (3) Add the mixed binder prepared in step (1) to the dry powder mixed in step (2) to wet the powder, stir at a slow speed of 50 rpm for 15 minutes, and scrape once after the slow stirring is completed. Then prepare deionized water according to the solid content of the slurry at 30%, and add some deionized water, stir at a slow speed of 50 rpm for 15 minutes, scrape the material once after completion, and then vacuumize and stir at a hig...
Embodiment 2
[0026] (1) According to the mass ratio of 1:4, 1:2, 1:3, stir and dilute at 20°C for 5 hours to prepare LA132, LA133, and LA136D adhesives, and then mix the three diluted adhesives in a ratio of 2:2:5. The binder is mixed, stirred at 20°C for 4 hours, and the prepared mixed binder is left to stand for later use;
[0027] (2) Add silicon carbon material and Ketjen black according to the mass ratio of silicon carbon material, conductive agent, and binder of 87:5:8 for dry mixing, and stir at a low speed of 100 rpm for 20 minutes;
[0028] (3) Add the mixed binder prepared in step (1) to the dry powder mixed in step (2), stir at a slow speed of 150 rpm for 30 minutes to wet the powder, and scrape once every 15 minutes. Then prepare deionized water according to the solid content of the slurry at 34%, and add some deionized water, stir at a slow speed of 150 rpm for 30 minutes, scrape the material once every 15 minutes, then vacuumize and stir at a high speed of 1200 rpm for 180 mi...
Embodiment 3
[0030] (1) According to the mass ratio of 1:2, 1:5, 1:5, stir and dilute at 25°C for 3 hours to prepare LA132, LA133, and LA136D adhesives, and then mix the three diluted adhesives in a ratio of 2:2:7. Mix the binder, stir at 25°C for 8 hours, and let the prepared mixed binder stand for later use
[0031] (2) Add silicon carbon material and carbon nanotubes for dry mixing according to the mass ratio of silicon carbon material, conductive agent, and binder of 88:2:10, and stir at a low speed of 75 rpm for 30 minutes;
[0032] (3) Add the mixed binder prepared in step (1) to the dry powder mixed in step (2), stir at a slow speed of 100 rpm for 45 minutes to wet the powder, and scrape once every 15 minutes. Then prepare deionized water according to the solid content of the slurry at 39.8%, and add some deionized water, stir at a slow speed of 100 rpm for 60 minutes, scrape the material once every 15 minutes, then vacuumize and stir at a high speed of 1500 rpm for 360 minutes, add...
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