Additive for electrolytic copper foil and production process of electrolytic copper foil for 7-mu. m double-light lithium ion battery
A lithium-ion battery and electrolytic copper foil technology, applied in the field of electrolytic copper foil production, can solve the problems of production difficulties, vertical stripe defects, long supply cycle, etc., and achieve the effect of reducing total cost and increasing profit margins
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Embodiment 1
[0022] An additive for electrolytic copper foil, the additive is an aqueous solution containing brightener DPS and industrial gelatin, the concentration of DPS in the additive is 15g / l, and the concentration of industrial gelatin is 4g / l. The molecular weight of the selected industrial gelatin is 10000-30000, the same below.
[0023] The production process of using the above-mentioned additives to prepare 7 μm electrolytic copper foil for dual-light lithium-ion batteries includes the following steps:
[0024] 1) Copper-dissolving solution: add the raw material copper rod after annealing to remove impurities into the copper-dissolving tank, add high-purity water and dilute sulfuric acid and blow in air, dissolve it at 85°C to form copper sulfate electrolyte, and adjust copper sulfate The copper ion content in the electrolyte is 95g / L, the H 2 SO 4 Concentration 115g / L, chloride ion content 29ppm, temperature 50°C;
[0025] 2) Electrolytic foil production: The above-mentioned...
Embodiment 2
[0028] An additive for electrolytic copper foil, the additive is an aqueous solution containing brightener DPS and industrial gelatin, the concentration of DPS in the additive is 10g / l, and the concentration of industrial gelatin is 2.5g / l. The molecular weight of the selected industrial gelatin is 10000-30000, the same below.
[0029] The production process of using the above-mentioned additives to prepare 7 μm electrolytic copper foil for dual-light lithium-ion batteries includes the following steps:
[0030] 1) Copper-dissolving solution: add the raw material copper rod after annealing to remove impurities into the copper-dissolving tank, add high-purity water and dilute sulfuric acid and blow in air, dissolve it at 85°C to form copper sulfate electrolyte, and adjust copper sulfate The copper ion content in the electrolyte is 75g / L, the H 2 SO 4 The concentration is 95g / L, the chloride ion content is 25ppm, and the temperature is 46°C;
[0031] 2) Electrolytic foil produ...
Embodiment 3
[0034] An additive for electrolytic copper foil, the additive is an aqueous solution containing brightener DPS and industrial gelatin, the concentration of DPS in the additive is 7g / l, and the concentration of industrial gelatin is 1.5g / l. The molecular weight of the selected industrial gelatin is 10000-30000, the same below.
[0035] The production process of using the above-mentioned additives to prepare 7 μm electrolytic copper foil for dual-light lithium-ion batteries includes the following steps:
[0036] 1) Copper-dissolving solution: add the raw material copper rod after annealing to remove impurities into the copper-dissolving tank, add high-purity water and dilute sulfuric acid and blow in air, dissolve it at 85°C to form copper sulfate electrolyte, and adjust copper sulfate The copper ion content in the electrolyte is 60g / L, the H 2 SO 4 The concentration is 75g / L, the chloride ion content is 21ppm, and the temperature is 42°C;
[0037] 2) Electrolytic foil produc...
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