High-energy density 18650 electrical core and production method thereof
A technology with high energy density and battery cells, which is applied to small-size batteries/battery packs, large-size batteries/battery packs, batteries, etc., can solve the problems that 18650 batteries cannot meet the energy density requirements of electric vehicles, and achieve Improved cycle performance, flexibility and strong adhesion, and the effect of improving cycle performance
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Embodiment 1
[0034] A high-energy-density 18650 cell, including a casing, a positive electrode sheet, a negative electrode sheet, a separator, and an electrolyte.
[0035] The current collector of the positive electrode sheet is aluminum foil, and the positive electrode active material is lithium nickel cobalt manganate 811. The conductive agent on the positive electrode sheet is superp Li, and the binder is polyvinylidene fluoride. The dispersant on the positive plate is the sodium salt of the condensation product of naphthalenesulfonic acid formaldehyde with a relative molecular weight of 10000-16000 and a sulfonation degree of 70-100%.
[0036] The current collector of the negative electrode sheet is copper foil, and the negative electrode active material is a silicon-based composite material; the conductive agent on the negative electrode sheet is superp Li, and the binder on the negative electrode sheet is sodium carboxymethyl cellulose.
[0037]Wherein, the thickness of the current ...
Embodiment 2
[0049] A high-energy-density 18650 cell, including a casing, a positive electrode sheet, a negative electrode sheet, a separator, and an electrolyte.
[0050] The current collector of the positive electrode sheet is aluminum foil, and the positive electrode active material is lithium nickel cobalt manganate 811. The conductive agent on the positive plate is carbon nanotube, and the binder is polyvinylidene fluoride. The dispersant on the positive plate is the sodium salt of the condensation product of naphthalenesulfonic acid formaldehyde with a relative molecular weight of 10000-16000 and a sulfonation degree of 70-100%.
[0051] The current collector of the negative electrode sheet is copper foil, and the negative electrode active material is a silicon-based composite material; the conductive agent on the negative electrode sheet is carbon nanotubes, and the binder on the negative electrode sheet is sodium alginate.
[0052] Wherein, the thickness of the current collector o...
Embodiment 3
[0064] A high-energy-density 18650 cell, including a casing, a positive electrode sheet, a negative electrode sheet, a separator, and an electrolyte.
[0065] The current collector of the positive electrode sheet is aluminum foil, and the positive electrode active material is lithium nickel cobalt manganate 811. The conductive agent on the positive electrode sheet is a graphene conductive agent, and the binder is polyvinylidene fluoride. The dispersant on the positive plate is the sodium salt of the condensation product of naphthalenesulfonic acid formaldehyde with a relative molecular weight of 10000-16000 and a sulfonation degree of 70-100%.
[0066] The current collector of the negative electrode sheet is copper foil, and the negative electrode active material is a silicon-based composite material; the conductive agent on the negative electrode sheet is a graphene conductive agent. The binder on the negative electrode sheet is sodium carboxymethyl cellulose and sodium algi...
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