Aiming at the requirement of high power performance of lithium ion battery for electric bicycle, electric vehicle, etc., a preparation method of positive electrode paste for medium battery is disclosed. The preparation method of PTMS LITHIUM COBALT ACID MATERIAL MAGNETIC magnetic positive slurry is characterized in that the solvent is added to the vacuum mixer, and then all the binder is added, and the medium speed is mixed for 30min. Add conductive agent and mix at medium speed;
Add half of the positive active substance and mix at high speed; Add the other half of the positive thorn material and mix at high speed for 30min; Vacuum, when the vacuum degree reaches 0.OlMPa, continue pumping for 3min, and continue mixing at high speed under vacuum state; After the end of mixing, close the vacuum, use nitrogen or nitrogen to break the vacuum, open the mixing bucket, add ethanol with the mass of 0.1% of the solvent, and then vacuum.
When the vacuum degree reaches 0.OlM, continue pumping for 3min, and then mix at low speed under vacuum for 30min; After mixing, turn off the vacuum, use nitrogen or nitrogen to break the vacuum, open the mixing bucket, pass the slurry through the 100-mesh screen, remove particles and impurities, and then coating.
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