Electrochemical corrosion preparation method of micropore battery copper foil and micropore copper foil of micropore battery
An electrochemical and copper foil technology, which is applied in the field of battery copper foil preparation, can solve problems affecting coating, slurry seepage, etc., and achieve the effects of solving adhesion, improving adhesion, and improving copper surface properties
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Embodiment 1
[0027] A method for preparing a high-performance lithium battery microporous copper foil by electrochemical corrosion, which is carried out according to the following steps:
[0028] 1) Clean the surface of the rolled battery copper foil to remove the lubricant: the composition of the first cleaning solution is 10g / L NaOH, 10g / L NaOH 2 CO 3 , 40g / L of Na 3 PO 4 , pass the rolled copper foil through the first cleaning solution, and keep it in the first cleaning solution for 8s.
[0029] 2) Press the cleaned copper foil into the chemical etching solution: the composition of the chemical etching solution is: 1.5mol / L HCl, 1mol / LC 2 h 2 o 4 , 0.1mol / L NH 4 Cl, 1mol / L FeCl 3 , 0.1mol / L AgCl 2The corrosion tank is used as the cathode, the copper foil is used as the anode, and 48V DC is applied for corrosion. The residence time of the copper foil in the etchant is 45s. At this stage, ensure that the upper and lower surfaces of the copper foil are soaked in the corrosive solu...
Embodiment 2
[0036] 1) Clean the surface of the battery copper foil: there are attachments on the surface of the rolled battery copper foil, which have an adverse effect on the formation of holes in the copper foil, and the copper foil needs to be cleaned by the first cleaning solution. Described first cleaning liquid is made of 15g / L NaOH, 15g / LNa 2 CO 3 , 15g / L Na 3 PO 4 composition. Pass the rolled copper foil through the first cleaning solution, and keep it in the first cleaning solution for 7s.
[0037] 2) All the cleaned copper foils are immersed in the chemical corrosion solution, so that the corrosion solution flows on the upper and lower surfaces of the copper foil in a circular flow mode, so as to achieve uniform corrosion on the upper and lower surfaces. The corrosion tank is used as the cathode, the copper foil is used as the anode, and 6V DC is added for corrosion. The DC can also be set to a safe voltage such as 36V, 64V, and the corrosion time is 20s. The corrosion time ...
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