Lithium ion battery and electrolyte thereof
A lithium-ion battery and electrolyte technology, applied in the field of lithium-ion batteries and their electrolytes, can solve problems such as side reactions, deterioration of the electrochemical performance and safety performance of lithium-ion batteries, and poor thermal stability of high-nickel cathode materials.
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[0061] (1) Preparation of positive electrode sheet
[0062] The cathode active material LiNi 0.8 co 0.1 mn 0.1 o 2 , the conductive agent conductive carbon black SuperP, and the binder polyvinylidene fluoride (PVDF) are uniformly dispersed in the N-methylpyrrolidone (NMP) solvent system according to the mass ratio of 97:1.4:1.6 to prepare the positive electrode slurry. The solid content in the positive electrode slurry is 77wt%; the positive electrode slurry is evenly coated on the aluminum foil of the positive electrode current collector, and after drying at 85°C, it is cold-pressed, trimmed, cut into pieces, and slitting, and finally vacuumed at 85°C Drying under conditions for 4 hours to prepare positive electrode sheet.
[0063] (2) Negative sheet preparation
[0064] Negative electrode active material graphite, conductive agent conductive carbon black SuperP, thickener sodium carboxymethyl cellulose (CMC), binder styrene-butadiene rubber emulsion (SBR) in deionized w...
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