High-capacity cylindrical 18650 lithium-ion battery and preparation method thereof
A lithium-ion battery, cylindrical technology, applied in the direction of cylindrical casing battery/battery, secondary battery manufacturing, electrolyte storage battery manufacturing, etc., can solve the problem that it is difficult to meet the requirements of high energy density, achieve high specific capacity, safety Good, excellent cycle performance effect
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[0029] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and the embodiments.
[0030] A high-capacity cylindrical 18650 lithium ion battery. The positive electrode active material uses high-capacity lithium nickel-cobalt aluminate, the conductive agent uses SuperP, and the adhesive uses Polyvinylidene fluoride (PVDF), the anode current collector adopts 13-15μm aluminum foil; the anode active material adopts high specific capacity composite artificial graphite, the conductive agent adopts SuperP, the thickener adopts sodium carboxymethyl cellulose (CMC) and the binder adopts Styrene rubber (SBR), the anode current collector adopts 6-8μm copper foil. The diaphragm adopts PP / PE / PP three-layer microporous ceramic diaphragm, and the cap adopts an explosion-proof cap containing PTC and CID. The electrolyte is soluble in ethylene carbonate (EC) and propylene carbonate (PC) dimethyl carbonate (DMC) Mixed solution of lithium hexafl...
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