Lithium ion battery anode pole piece
A lithium-ion battery, anode technology, applied in battery electrodes, non-aqueous electrolyte battery electrodes, secondary batteries, etc., can solve the problems of swelling and peeling, prone to swelling and peeling, and achieve low energy density and improve energy density. Effect
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Embodiment 1
[0023] Embodiment 1: as figure 1 As shown, a lithium ion battery anode pole piece of the present invention comprises a current collector 1 and a bottom membrane 2 arranged on the surface of the current collector 1, and a top membrane 3 arranged on the surface of the bottom membrane 2, the bottom membrane 2 and the top membrane The diaphragms 3 all include active materials, adhesives and conductive agents, the active materials in the bottom diaphragm 2 are graphite, and the active materials in the top diaphragm 3 are at least one of silicon, silicon alloys and tin alloys.
[0024] Preparation of the anode electrode sheet: the anode active material graphite and the conductive agent superconducting carbon (Super-P), the thickener sodium carboxymethyl cellulose (CMC), and the binder styrene-butadiene rubber (SBR) in a mass ratio of 96: 2:2:2 was made into a slurry, coated on the current collector 1 (copper foil) and dried at 85°C to obtain a bottom membrane 2 with a thickness of 2...
Embodiment 2
[0027] Embodiment 2: The difference from Embodiment 1 is that the thickness of the bottom membrane 2 is 5 μm, the active material in the top membrane 3 is silicon-carbon alloy, and the thickness of the top membrane 3 is 80 μm.
[0028] The rest are the same as in Embodiment 1, and will not be repeated here.
Embodiment 3
[0029] Embodiment 3: The difference from Example 1 is that the thickness of the bottom membrane 2 is 10 μm, the active material in the top membrane 3 is a tin-carbon alloy, and the thickness of the top membrane 3 is 40 μm, the bottom membrane 2 and the top The conductive agents in the diaphragm 3 are all vapor phase carbon fibers.
[0030] The rest are the same as in Embodiment 1, and will not be repeated here.
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