Method for changing surface morphology of lithium battery current collector copper foil
A technology of surface morphology and current collector, applied in battery electrodes, electrode carriers/current collectors, circuits, etc., can solve the problems of unstable mass production quality, complex preparation process, harsh process conditions, etc.
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Embodiment 1
[0017] Prepare a sulfuric acid solution with a concentration of 80 g / L, then add a certain amount of copper sulfate to make the concentration of copper sulfate 200 g / L, take 50 mL of the solution in a beaker, and then add 2 mL of 1-butyl-3 methyl imidazolium chloride and stir well. Put the copper foil in the solution, soak it for 10 minutes, take it out and wash it with distilled water, then you can get the copper foil with changed surface morphology.
[0018] figure 1 It is the SEM image of the original copper foil (picture a) and the copper foil surface after the change of shape (picture b) after 20,000 times magnification. It can be seen from the figure that the surface of the original copper foil is relatively smooth and flat, but after soaking, many irregular particles are formed on the surface of the copper foil, and many gaps appear, showing an uneven surface morphology, and the degree of roughness increases significantly.
[0019] figure 2 It is the XRD pattern of ...
Embodiment 2
[0021] Prepare a sulfuric acid solution with a concentration of 50 g / L, then add a certain amount of copper sulfate to make the concentration of copper sulfate 150 g / L, take 50 mL of the solution in a beaker, and add 2.0 mL of 1,3-dimethylimidazole Chloride and stir well. Put the copper foil in the solution, soak it for 20 minutes, take it out and wash it with distilled water, and then you can get the copper foil with changed surface morphology.
Embodiment 3
[0023] Prepare a sulfuric acid solution with a concentration of 80 g / L, then add a certain amount of copper sulfate to make the concentration of copper sulfate 150 g / L, take 50 mL of the solution in a beaker, add 1 mL of 1-benzyl-2-chloroform imidazolium chloride and stir well. Put the copper foil in the solution, soak it for 25 minutes, take it out and wash it with distilled water, and then you can get the copper foil with changed surface morphology.
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