Method for treating surface of copper foil of affluxion body in lithium ion batteries
A lithium-ion battery and surface treatment technology, which is applied in the field of surface treatment technology and current collector copper foil, can solve the problems of easy detachment of electrode attachments, low copper foil roughness, and easy corrosion and discoloration of copper foil, so as to improve the synergy of corrosion inhibition effect, the effect of uniform roughening shape and good brightness
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Embodiment 1
[0026] Put the 18μm thick copper foil in the roughened electrolyte at a temperature of 25°C and a current density of 0.4A / cm 2 Under the condition of cathodic electrolysis for 10s, take it out, and rinse it with deionized water for 1 to 5 times; 2 Under the condition of cathodic electrolysis for 120s, take it out, and rinse it with deionized water for 1 to 5 times; then put it into the antirust treatment solution, perform antirust treatment for 300s at a temperature of 50°C, take it out, and wash it with water 1 to 5 times, and after drying, a copper foil with a dendritic structure on the surface and a roughness of Ra=0.44 μm is obtained.
[0027] The roughened electrolyte is composed of copper ions Cu with a concentration of 10g / l 2+ , sulfuric acid H with a concentration of 140g / l 2 SO 4 , the stannous ion Sn of concentration 0.25g / l 2+ and tungsten ion W with a concentration of 0.03g / l 6+ composition;
[0028] The covering electrolyte is composed of copper ions Cu wit...
Embodiment 2
[0032] Put the 18μm thick copper foil in the roughened electrolyte at a temperature of 25°C and a current density of 0.4A / cm 2 Under the condition of cathodic electrolysis for 10s, take it out, and rinse it with deionized water for 1 to 5 times; then put it in the covering electrolyte, at a temperature of 25°C, and a current density of 0.1A / cm 2Under the condition of cathodic electrolysis for 120s, take it out, and rinse it with deionized water for 1 to 5 times; then put it into the antirust treatment solution, perform antirust treatment for 300s at a temperature of 50°C, take it out, and wash it with water 1 to 5 times, and after drying, a copper foil with a dendritic structure on the surface and a roughness of Ra=0.47 μm is obtained.
[0033] The roughened electrolyte is composed of copper ions Cu with a concentration of 10g / l 2+ , sulfuric acid H with a concentration of 140g / l 2 SO 4 , the concentration of 0.5g / l stannous ion Sn 2+ and tungsten ion W with a concentratio...
Embodiment 3
[0038] Put the 18μm thick copper foil in the roughened electrolyte at a temperature of 25°C and a current density of 0.4A / cm 2 Under the condition of cathodic electrolysis for 10s, take it out, and rinse it with deionized water for 1 to 5 times; then put it in the covering electrolyte, at a temperature of 25°C, and a current density of 0.1A / cm 2 Under the condition of cathodic electrolysis for 120s, take it out, and rinse it with deionized water for 1 to 5 times; then put it into the antirust treatment solution, perform antirust treatment for 300s at a temperature of 50°C, take it out, and wash it with water 1 to 5 times, and after drying, a copper foil with a dendritic structure on the surface and a roughness of Ra=0.42 μm is obtained.
[0039] The roughened electrolyte is made of copper ions Cu with a concentration of 15g / l 2+ , sulfuric acid H with a concentration of 140g / l 2 SO 4 , the concentration of 0.5g / l stannous ion Sn 2+ and tungsten ion W with a concentration o...
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Abstract
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