Slurry composition, preparation method thereof, negative electrode of battery and lithium-ion battery
A lithium-ion battery and composition technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of high recycling costs, environmental pollution, and high production costs
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[0020] According to a preferred embodiment of the present invention, the modified carboxylated styrene-butadiene latex is prepared according to a method comprising the following steps:
[0021] (1) In the presence of the initiator, the mixed system containing butadiene, styrene, acrylic acid, retarder, molecular weight regulator, water, pH buffer, chelating agent and emulsifier is sequentially heated at 55-60°C performing a first polymerization and a second polymerization at 65-75°C;
[0022] (2) Combine the second polymerization reaction product with an oil phase containing polar monomers, (additional) styrene and (additional) butadiene and an oil phase containing water, (additional) initiator, (additional) emulsifier Mixing with the aqueous phase of the (additional) molecular weight regulator is carried out, and the resulting mixture is subjected successively to a third polymerization reaction at 75-80°C and a fourth polymerization reaction at 85-90°C.
[0023] The present ...
preparation example 1
[0052] This preparation example is used to illustrate the modified carboxylated styrene-butadiene latex provided by the present invention and its preparation method.
[0053] (1) Mix 560g butadiene, 320g styrene, 40g acrylic acid, 0.09g p-nitrochlorobenzene sulfonic acid, 0.84g tertiary dodecylmercaptan, 2100g deionized water, 0.92g sodium bicarbonate, 1.08g ethyl alcohol Potassium diamine tetraacetate, 24.4g dioctyl sodium succinate sulfonate and 16.3g succinate-1,4-di(1-methylheptyl) sodium sulfonate were added to the reaction kettle, and the stirring was started at a speed of The temperature is 120rmp, after stirring evenly, nitrogen gas is introduced, vacuum is pumped, and the air is replaced 3 times. The temperature was raised to 57° C., 124 g of potassium persulfate aqueous solution with a concentration of 2% by weight was introduced to start the polymerization reaction, and the reaction temperature was maintained at 57° C. for 2 hours. Then the temperature was raised t...
preparation example 2
[0056] This preparation example is used to illustrate the modified carboxylated styrene-butadiene latex provided by the present invention and its preparation method.
[0057](1) 320g of butadiene, 560g of styrene, 18g of acrylic acid, 0.25g of 2,6-dichloro-p-nitroaniline, 1.5g of tertiary dodecyl mercaptan, 2100g of deionized water, 0.92g of sodium bicarbonate, Add 0.88g of ethylenediaminetetraacetic acid tripotassium salt dihydrate, 24.4g of sodium dioleyl sulfonate succinate and 43.8g of sodium dihexyl succinate sulfonate into the reaction kettle, start stirring at a speed of 120rmp, After stirring evenly, nitrogen was introduced, vacuum pumped, and the air was replaced 3 times. The temperature was raised to 55° C., and 200 g of an aqueous potassium persulfate solution with a concentration of 2% by weight was introduced to start the polymerization reaction, and the reaction temperature was maintained at 55° C. for 3 hours. Then the temperature was raised to 70° C. to contin...
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