Polymer lithium ion battery preparation technique and products
A lithium-ion battery, ion battery technology, applied in secondary batteries, battery pack parts, final product manufacturing, etc., can solve the problems of insufficient ability to adsorb precursor solutions, high automation requirements, and high battery manufacturing costs, and achieve improved High-current charge-discharge performance and cycle performance, improved market competitiveness, and low battery manufacturing costs
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Embodiment 1
[0040] Prepare the polymer battery as shown in Figure 1 according to the following method, in Figure 1, the reference numeral 1 represents the polymer three-dimensional network structure layer, 2 represents the positive pole, 3 represents the negative pole, 4 represents the positive pole tab, and 5 represents the negative pole tab, 6 represents a polymer adhesive layer, and 7 represents an outer packaging shell.
[0041] 1. Preparation of modified diaphragm:
[0042] The cross-linking agent butanediol diacrylate and polyvinylidene fluoride are mixed according to the mass ratio of 40%:60%, and then dissolved in acetone solvent. By adjusting the amount of solvent, the viscosity of the modified liquid is controlled at about 70psi. Then a polyethylene microporous membrane with a thickness of 16 micrometers was immersed in the above-mentioned modifying solution. After drying, a modified separator with a thickness of 20 microns was obtained.
[0043] 2. Preparation of battery pos...
Embodiment 2
[0053] 1. Preparation of modified diaphragm:
[0054] After mixing the crosslinking agent pentanediol diacrylate and the polyvinylidene fluoride-hexafluoropropylene copolymer at a mass ratio of 15:85, they are dissolved in tetrahydrofuran solvent. By adjusting the amount of solvent, the viscosity of the modified liquid is controlled at about 100psi. Then a polyethylene-polypropylene composite microporous membrane with a thickness of 25 microns was immersed in the above-mentioned modifying solution. After drying, a modified separator with a thickness of 35 microns was obtained.
[0055] 2. Preparation of battery positive and negative electrodes:
[0056] Weigh pentylene glycol diacrylate according to 0.25% and 0.5% of the solid content of the positive electrode and negative electrode slurries, and add them to the positive electrode and negative electrode slurries respectively. After stirring evenly, the pole piece is prepared according to the pole piece production process of...
Embodiment 3
[0065] 1. Preparation of modified diaphragm:
[0066] Dissolve polyvinylidene fluoride-hexafluoroethylene in acetone solvent, adjust the amount of solvent to control the viscosity of the modified liquid at about 40psi, and then impregnate the polyethylene-polypropylene microporous membrane with a thickness of 20 microns in the above modified solution, and dried to obtain a modified diaphragm with a thickness of 25 microns.
[0067] 2. Preparation of battery positive and negative electrodes:
[0068] Weigh pentylene glycol diacrylate according to 0.02% and 0.04% of the solid content of the positive electrode and negative electrode slurries, and add them to the positive electrode and negative electrode slurries respectively. After stirring evenly, the pole piece is prepared according to the pole piece production process of the liquid lithium battery.
[0069] 3. Preparation of battery core:
[0070] According to the liquid lithium-ion battery process, the modified diaphragm i...
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