Slurry-homogenizing process for positive electrode slurry of lithium ion battery, positive electrode plate and lithium ion battery
A lithium-ion battery and positive electrode slurry technology, which is applied to battery electrodes, non-aqueous electrolyte battery electrodes, secondary batteries, etc., can solve the problems of affecting the uniformity of the slurry, poor stability of the slurry, and difficulty in dispersing the slurry , to enhance the bonding effect, solve the problem of difficult dissolution of the binder, and reduce the baking temperature
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[0029] Example 1
[0030] A homogenization process for lithium ion battery cathode slurry includes the following steps:
[0031] a) Preparation of glue solution: mix the binder and the solvent at a weight ratio of 1:5, then stir and disperse for 4 hours at a temperature of 50°C and a rotation speed of 30 Hz to prepare a binder glue solution. Vacuum storage under -85KPa;
[0032] b) Stirring with a V-shaped mixer: mix the positive electrode active material and the conductive agent and stir in the V-shaped mixer at a speed of 20 Hz for 40 minutes;
[0033] c) Pre-mixing and stirring: Add the positive active material and conductive agent treated in step b to the homogenization mixer, and then add 40wt% of the binder glue solution and 20wt% of the remaining solvent to the homogenization mixer to Stir at 10 rpm and 300 rpm for 10 minutes, scrape after the end, then stir at 15 rpm and 1000 rpm for 20 minutes, and scrape after the end;
[0034] d) High-speed stirring: add the remaining binde...
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[0040] Example 2
[0041] A homogenization process for lithium ion battery cathode slurry includes the following steps:
[0042] a) Preparation of glue solution: mix the binder and solvent at a weight ratio of 1:10, stir and disperse it at a temperature of 50-60°C at a speed of 30-50 Hz for 4-6 hours to prepare a binder glue solution. The binder glue solution is stored in vacuum at a vacuum degree of -85~-100KPa;
[0043] b) Stirring with a V-shaped mixer: mix the positive electrode active material and the conductive agent in a V-shaped mixer at a speed of 20-40 Hz for 40-60 minutes;
[0044] c) Pre-mixing and stirring: Add the positive active material and conductive agent processed in step b to the homogenizer mixer, and then add 40-60wt% of the binder glue solution and 20-40wt% of the remaining solvent to the homogenate In the mixer, stir for 10-20 minutes at revolutions of 10-15 rpm and 300-800 rpm, scrape after the end, then stir at 15-20 rpm and 1000-1500 rpm for 20-30 minutes, ...
Example Embodiment
[0051] Example 3
[0052] A homogenization process for lithium ion battery cathode slurry includes the following steps:
[0053] a) Preparation of glue solution: mix the binder and the solvent at a weight ratio of 1:7, stir and disperse at a temperature of 60°C at a speed of 50 Hz for 6 hours to prepare a binder glue solution, and then place the binder glue solution in Vacuum storage under -100KPa;
[0054] b) Stirring with a V-shaped mixer: mix the positive electrode active material and the conductive agent and stir in the V-shaped mixer at a speed of 40 Hz for 60 minutes;
[0055] c) Pre-mixing and stirring: Add the positive active material and conductive agent treated in step b to the homogenization mixer, and then add 60wt% of the binder glue solution and 40wt% of the remaining solvent to the homogenization mixer to Stir at 15 rpm and 800 rpm for 20 minutes, scrape after the end, then stir at 20 rpm and 1500 rpm for 30 minutes, scrape after the end;
[0056] d) High-speed stirring...
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