Lithium ion battery and preparation method thereof
A technology for lithium-ion batteries and battery casings, applied in the manufacture of electrolyte batteries, secondary batteries, battery electrodes, etc., can solve problems affecting cycle life, poor conductivity, hindering mass transfer, etc. Improve cycle performance and increase the effect of gram capacity
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[0037] Example
[0038] According to the technical scheme of the present invention, a lithium battery is prepared, and the steps are as follows:
[0039] (1) Weigh the components according to 95% lithium iron phosphate, 2% carbon nanotubes, 0.5% methyl lithium, 2.5% PVDF, and at the same time weigh the NMP solvent according to the amount. The NMP weighed is the mass of four solid substances 45% of
[0040] (2) Take out PVDF and part of NMP, prepare a 10% mass fraction of glue, and disperse it for later use;
[0041] (3) Add carbon nanotubes and methyl lithium to the remaining NMP. Under vacuum conditions, the rotation frequency is 45Hz and the revolution is 40Hz for high-speed dispersion for 1h, and then ultrasonic dispersion for 30min. The ultrasonic dispersion process conditions are 15-20KHz, power 200-300W, then add lithium iron phosphate for the second high-speed dispersion for 4h;
[0042] (4) Add the glue to the dispersed slurry and mix and disperse at high speed for 2h;
[0043]...
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