Preparation of Double-sided Photoelectrolytic Copper Foil for Special Lithium Batteries
A lithium battery and photoelectrolysis technology, applied in the field of copper foil manufacturing, can solve the problems affecting the quality and reliability of downstream products, large fluctuations in product quality parameters, and unstable production processes, etc., to achieve simple and stable production processes and small fluctuations in quality parameters , The effect of reducing the internal resistance of lithium batteries
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[0017] The first embodiment
[0018] See figure 1 The preparation of the double-sided photoelectrolytic copper foil for special lithium batteries provided by the first embodiment of the present invention, that is, the manufacturing method of ultra-thin double-sided photoelectrolytic copper foil for lithium ion secondary batteries, includes the following steps.
[0019] The prepared first additive solution 100 and the second additive solution 200 are injected into the liquid inlet pipe 10 of the electrolytic cell 300 through a metering pump (not shown) at a flow rate of 7.5L / h at a ratio of 2:1. During the process, it is fully mixed with the electrolyte in the electrolyte preparation system 400 and then enters the electrolytic tank 300;
[0020] The flow rate of the electrolyte is 55-65 cubic meters per hour. After the mixed solution of the first additive solution 100, the second additive solution 200 and the electrolyte enters the electrolytic tank 300, the flow rate is 5000-6000 A / m...
Example Embodiment
[0026] Example two
[0027] Refer to the manufacturing method of Example 1 to prepare copper foil products. The temperature of the electrolyte is 50-55°C, and the concentration of each substance is: copper ion concentration 85g / L, sulfuric acid concentration 170g / L, and chloride ion concentration 0.03g / L, the electrolyte flow rate is 60-70 cubic meters / hour; the first additive solution and the second additive solution are added in a 2:1 ratio of 7 liters / hour. The first additive solution is prepared according to the following raw materials: sodium 3-mercapto-1-propanesulfonate 2.0g / L, polyethylene glycol 0.020g / L, ethylene thiourea 0.0020g / L; the second additive is soluble The raw material ratio is 2.5g / L gelatin and 0.25g / L hydroxyethyl cellulose.
[0028] The matte surface of the electrolytic copper foil prepared in this example is mirror-like like the smooth surface, the crystal grains are in a layered structure, and the thickness of the copper foil is 8.9~9.1um. After testing...
Example Embodiment
[0029] Example three
[0030] Prepare copper foil products with reference to the manufacturing method of Example 1. The temperature of the electrolyte is 50-55°C, and the concentration of each substance is: copper ion concentration 75g / L, sulfuric acid concentration 165g / L, and chloride ion concentration 0.03g / L, the electrolyte flow rate is 60-70 cubic meters / hour; the first additive solution and the second additive solution are added at a 2:1 ratio of 7.5 liters / hour. The first additive solution is made of the following raw materials: 3-mercapto 1-propanesulfonate sodium 2.5g / L, polyethylene glycol 0.030g / L, ethylene thiourea 0.0025g / L; the second additive solution The raw material ratio is 2.0 g / L gelatin and 0.20 g / L hydroxyethyl cellulose.
[0031] The matte surface of the electrolytic copper foil prepared in this example is mirror-like like the smooth surface, and the crystal grains are in a layered structure. The thickness of the copper foil is 9.0~9.2um. After testing, th...
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