Electrode slurry preparing method
A technology of electrode slurry and electrode active material, which is applied in the direction of electrode manufacturing, battery electrodes, circuits, etc., can solve the problems of difficult and effective dispersion of conductive agents, fast capacity decay speed, poor battery capacity, etc., and achieve the discharge platform and cycle. Stable resistance, slow capacity fading speed, and increased specific capacity
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preparation example Construction
[0019] According to a preferred embodiment of the present invention, the preparation method of electrode slurry of the present invention comprises the steps:
[0020] (1) Mix the conductive agent with the conductive agent dispersion medium, then wet the conductive agent through primary stirring, and then disperse the conductive agent evenly through secondary stirring, which also preferably includes removing conductive agent particles with a particle size exceeding 5000 nanometers or particle aggregates to obtain conductive agent dispersion;
[0021] (2) mixing the binder with the binder solvent, and stirring to make it uniformly dispersed to obtain a binder solution;
[0022] (3) Mix and stir the electrode active material with the conductive agent dispersion obtained in the above step (1), the binder solution obtained in the step (2) and an appropriate amount of solvent to obtain a uniform electrode slurry.
[0023] The mixing method of the electrode active material, the cond...
Embodiment 1
[0028]This example illustrates the preparation method of the electrode slurry provided by the present invention.
[0029] 1. Get 1.5 parts by weight of deionized water and 0.3 parts by weight of carbon black conductive agent (specific surface area 2200m 2 / g) mixing, firstly carry out primary stirring at a rate of 300 rpm, and the stirring time is 15 minutes; then carry out secondary stirring at a rate of 2200 rpm, and take a sample every 10 minutes during the stirring process , using a particle size analyzer (X100 laser particle size analyzer, Microtrac, USA) to measure with deionized water as the sample medium, until the D of the conductive agent particles 50 When the particle size is below 3000 nm, stop stirring, and pass the conductive agent dispersion through a 3000-mesh nylon sieve to remove conductive agent particles or particle aggregates with a particle size exceeding 5000 nm;
[0030] 2. Mix 5 parts by weight of deionized water with 1 part by weight of polyacrylamid...
Embodiment 2
[0033] This example is used to illustrate the preparation method of the electrode slurry of the present invention.
[0034] 1. Get 8 parts by weight of N-methyl-2-pyrrolidone and 1 part by weight of carbon black conductive agent (specific surface area 1800m 2 / g) mixing, firstly carry out primary stirring at a rate of 200 rpm, and the stirring time is 10 minutes; then carry out secondary stirring at a rate of 2000 rpm, and take a sample every 10 minutes during the stirring process , using a particle size analyzer (X100 laser particle size analyzer, Microtrac, USA) to measure with deionized water as the sample medium, until the D of the conductive agent particles 50 When the particle size is below 3000 nm, stop stirring, and pass the conductive agent dispersion through a 3000-mesh nylon sieve to remove conductive agent particles or particle aggregates with a particle size exceeding 5000 nm;
[0035] 2. Mix 21 parts by weight of N-methyl-2-pyrrolidone with 3 parts by weight of ...
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