Overcharge-resistant pole piece, method for preparing same, and lithium ion battery
A technology of overcharging and pole piece, which is applied in the direction of battery electrodes, secondary batteries, non-aqueous electrolyte storage battery electrodes, etc., can solve the problems of poor effect, low cycle life of battery cells, poor effect of overcharging performance improvement, etc., to achieve The effect of avoiding internal short circuit and improving safety
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specific Embodiment approach 1
[0022] An overcharge-resistant positive electrode sheet, comprising an overcharge-resistant coating and a positive electrode sheet layer, the overcharge-resistant coating is arranged on both surfaces of the positive electrode sheet layer, and the overcharge-resistant coating includes an overcharge-resistant coating material, the overcharge-resistant material includes silicon, silicon oxide, tin oxide, titanium dioxide, tungsten oxide, iron oxide, molybdenum oxide, cobalt oxide, copper oxide and nickel oxide, and titanium Lithium Oxide.
[0023] Further, the particle size range of the overcharge-resistant material is 0.1-10 μm.
[0024] Further, the thickness of the overcharge-resistant coating is 0.5-100 μm, preferably 3-12 μm.
[0025] Further, the mass ratio of the lithium titanate to the overcharge-resistant material is 0.01%-99.99%.
[0026] A preparation method of the overcharge-resistant positive electrode sheet, comprising the following steps: dispersing the positive ...
specific Embodiment approach 2
[0033] An overcharge-resistant negative electrode sheet, comprising an overcharge-resistant coating and a negative electrode sheet layer, the overcharge-resistant coating is arranged on both surfaces of the negative electrode sheet layer, and the overcharge-resistant coating includes an overcharge-resistant coating material, the overcharge-resistant material includes silicon, silicon oxide, tin oxide, titanium dioxide, tungsten oxide, iron oxide, molybdenum oxide, cobalt oxide, copper oxide and nickel oxide, and titanium Lithium Oxide.
[0034] Further, the particle size range of the overcharge-resistant material is 0.1-10 μm.
[0035] Further, the thickness of the overcharge-resistant coating is 0.5-100 μm, preferably 3-12 μm.
[0036] Further, the mass ratio of the lithium titanate to the overcharge-resistant material is 0.01%-99.99%.
[0037] A preparation method of the overcharge-resistant negative electrode sheet, comprising the following steps: mixing and dispersing th...
specific Embodiment approach 3
[0044] An overcharge-resistant pole piece, comprising an overcharge-resistant coating and a pole piece layer, the overcharge-resistant coating is arranged on both surfaces of the pole piece layer, and the overcharge-resistant coating includes an overcharge-resistant material, the overcharge-resistant material includes silicon, silicon oxide, tin oxide, titanium dioxide, tungsten oxide, iron oxide, molybdenum oxide, cobalt oxide, copper oxide and nickel oxide, and titanium Lithium Oxide.
[0045] Further, the particle size range of the overcharge-resistant material is 0.1-10 μm.
[0046] Further, the thickness of the overcharge-resistant coating is 0.5-100 μm, preferably 3-12 μm.
[0047] Further, the mass ratio of the lithium titanate to the overcharge-resistant material is 0.01%-99.99%.
[0048]A preparation method of the overcharge-resistant positive electrode sheet, comprising the following steps: dispersing the positive electrode active material, the positive electrode b...
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