Preparation method of coating film containing monovalent ion phosphate coating layer
A phosphate and coating film technology, which is applied to coatings, structural parts, battery pack components, etc., can solve problems affecting battery safety performance, poor electrolyte matching, and increasing battery internal resistance, etc., to improve Cycle performance, easy operation, and the effect of improving discharge performance
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Embodiment 1
[0030]In the reactor, mix acetone and dimethylformamide at a volume ratio of 7:1 to obtain a mixed solution. Add 2% by weight of the weight of the mixed solution and silver phosphate with a particle size of 5 nm, and ultrasonically oscillate for 18 minutes to prepare a uniformly mixed suspension. Add 2.5% by weight of the mixed solution weight and polyvinylidene fluoride-hexafluoropropylene with an average molecular weight of 1.5 million and 1.25% by weight of the mixed solution weight and polymethyl methacrylate with an average molecular weight of 900,000 in the suspension, ultrasonically oscillate 25min. Stir at 60°C for 9 h to turn the solution in the reactor into a viscous liquid. The polypropylene monolayer film (thickness 20µm) was flattened, and the two surfaces of the monolayer film were treated with low-temperature plasma for 60s under the oxygen atmosphere, and the viscous liquid was coated on the treated monolayer film respectively. on both surfaces. The total th...
Embodiment 2
[0033] In the reactor, mix acetone and dimethylformamide according to the volume ratio of 0.5:1 to obtain a mixed solution. Add 0.5% by weight of the weight of the mixed solution and cuprous phosphate with a particle size of 1 nm. Sonicate for 1 min to obtain a well-mixed suspension. Add polyvinylidene fluoride-hexafluoropropylene with 1% weight of the mixed solution weight and an average molecular weight of 400,000 to the suspension, and then add 0.5% weight of the mixed solution weight and polymethyl methacrylate with an average molecular weight of 700,000 , Ultrasonic oscillation for 10min. Stir at 50°C for 8 h to turn the solution in the reactor into a viscous liquid. Spread the polyethylene monolayer film flatly, and treat one surface of the monolayer film with low-temperature plasma for 2 seconds in an air atmosphere, and coat the viscous liquid on the surface of the treated monolayer film. Vacuum drying at 50°C and 0.01 atmospheric pressure to prepare a coating film ...
Embodiment 3
[0035] In a reaction kettle, mix acetone and dimethylformamide according to a volume ratio of 18:1 to prepare a mixed solution. 2.5% by weight of the weight of the mixed solution and silver phosphate with a particle size of 5 μm were added. Ultrasonic oscillation for 30 minutes to obtain a well-mixed suspension. Add 5% weight of the mixed solution weight and polyvinylidene fluoride-hexafluoropropylene with an average molecular weight of 2,800,000 to the suspension, then add 2.5% weight of the mixed solution weight and polymethyl methacrylate with an average molecular weight of 1,600,000, Ultrasonic oscillation for 50min. Stir at 90°C for 12 h to turn the solution in the reactor into a viscous liquid. Lay the PP / PE / PP multilayer film obtained by combining PP and PE film, and treat the surfaces of the two PP layers of the PP / PE / PP multilayer film with low-temperature plasma for 8 min in an oxygen atmosphere. The viscous liquid is coated on the surface of the treated multi-lay...
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