Lithium ion battery
A lithium-ion battery and lithium-ion technology, applied in the direction of secondary batteries, non-aqueous electrolyte battery electrodes, circuits, etc., can solve the problems of increased internal resistance, increased electrode thickness, and weakened fast charging effect, achieving good cycle life and Effects of safety and high charging capacity
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[0038] In a specific embodiment, the present invention provides a method of preparing a lithium ion battery, the preparation method comprising:
[0039] The positive electrode plate, the diaphragm, and negative electrode sheet are prepared into a stacked core, and then the lithium ion battery is obtained by a pole welder, a soft clad battery side seal, an upper seal. .
[0040] The present invention also provides a method of preparing a positive electrode plate, the preparation method comprising:
[0041] The positive electrode active substance, conductive agent, and adhesive are mixed, the solvent, homogenate is added to the surface of the positive electrode collector, and the positive electrode plate is obtained after drying the roll.
[0042] The present invention also provides a method of preparing a negative electrode plate, the preparation method comprising:
[0043] The negative electrode active material, the conductive agent, and the binder were mixed, the solvent, homogen...
Example Embodiment
[0044] Example 1
[0045] This embodiment provides a lithium ion battery, the lithium ion battery including a positive electrode plate, a negative electrode sheet, a diaphragm, and an electrolyte;
[0046] The following values of the positive electrode sheet are shown in Table 1: DS is a lithium ion solid phase diffusion coefficient in the positive electrode plate, and D50 is a median particle size of the positive electrode active material in the positive electrode plate, CW is a positive electrode plate. The surface density of the medium electrode layer, the PD is the compaction density of the positive electrode plate, and (LNDS) 2 / (D50 × CW × Pd) results.
[0047] The positive electrode active substance in the positive electrode sheet is NCM11, the conductive agent is carbon nanotubes, and the binder is polytetrafluoroethylene;
[0048] The negative electrode active substance in the negative electrode sheet is natural graphite, the conductive agent is carbon nanowire, and th...
Example Embodiment
[0053] Example 2
[0054] This embodiment provides a lithium ion battery, its positive active substance, D50, CW, PD, and (LNDS) 2 / (D50 × CW × Pd) is also shown in Table 1.
[0055] The remaining preparation methods and parameters are consistent with Example 1.
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