Manufacturing method of high-capacity high-magnification high-safety lithium ion battery
A lithium-ion battery and manufacturing method technology, applied in the direction of electrolyte battery manufacturing, final product manufacturing, sustainable manufacturing/processing, etc., can solve the problems of low capacity, low safety, and poor rate performance of power batteries, and achieve uniform current density. , the effect of increasing capacity and simple preparation
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[0021] Example one
[0022] Add an appropriate amount of NMP to the stirring pot, and then add powdered PVDF. The PVDF concentration is 5%. The stirring time of PVDF is 3h. After PVDF is completely dissolved in NMP, add silica powder to the concentration of silica. 1%, the solution is ready for use. The silica solution is uniformly coated on the net-shaped aluminum foil and net-shaped copper foil current collector with a coater. The thickness of the silica powder on the net-shaped aluminum foil and the net-shaped copper foil is 1μm, and its porosity The pore size is 50%, the pore size is 80nm, the positive electrode active material is lithium manganate, and the negative electrode active material is mesocarbon microspheres (MCMB). The 7568270 square lithium ion battery is made with a capacity of 10Ah.
[0023] The manufacture of the positive electrode sheet: the lithium manganate, the binder, and the conductive agent are configured into the positive electrode slurry according ...
Example Embodiment
[0026] Example 2
[0027] Add an appropriate amount of NMP to the stirring pot, and then add powdered PVDF. The PVDF concentration is 5%. The stirring time of PVDF is 3h. After PVDF is completely dissolved in NMP, add silica powder to the concentration of silica. It is 1.5%; dissolve CMC in deionized water, the concentration of CMC is 1.0%, and then add 1.5% SBR. After it is completely dissolved, add silica powder with a concentration of 1%. The two solutions are prepared for use. The silica solution is uniformly coated on the mesh aluminum foil current collector with a coater. The thickness of the silica powder on the mesh aluminum foil is 1.5 μm, the porosity is 50%, and the pore diameter is 80 nm; The CMC solution of silicon oxide is uniformly coated on the mesh copper foil with a thickness of 1μm, a porosity of 50%, and a pore size of 80nm. The positive electrode active material is nano-lithium iron phosphate, and the negative electrode active material is mesocarbon micros...
Example Embodiment
[0031] Example 3
[0032] Add an appropriate amount of NMP to the stirring pot, and then add powdered PVDF, the concentration of PVDF is 6%, the stirring time of PVDF is 5h, after PVDF is completely dissolved in NMP, add silica powder, the concentration of silica 1%; Dissolve CMC in deionized water, the concentration of CMC is 1.40%, then add 2.0% SBR, after it is completely dissolved, add silica powder with a concentration of 1%, and the solution is prepared for use. The silica solution is uniformly coated on the mesh aluminum foil current collector with a coater. The thickness of the silica powder on the mesh aluminum foil is 1 μm, the porosity is 50%, and the pore diameter is 80 nm; The silicon CMC solution is uniformly coated on the mesh copper foil, the thickness is 1.5μm, the porosity is 50%, and the pore diameter is 80nm. The positive electrode active material is nano-lithium iron phosphate, and the negative electrode active material is mesocarbon microspheres. (MCMB),...
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