A method for ultrafast laser underwater processing of copper foil current collector with micro-nano composite structure
A composite structure, ultra-fast laser technology, applied in nanotechnology, nanotechnology, laser welding equipment and other directions, can solve the problems of poor cycle performance, thick thickness, battery materials have not been excavated, and achieve high processing efficiency and simple operation. Effect
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Embodiment 1
[0025] Embodiment 1, a method for ultrafast laser underwater processing of copper foil current collector with micro-nano composite structure, comprising the following steps:
[0026] 1) Build a femtosecond laser processing system. The femtosecond laser system includes a femtosecond laser 1. The output laser of the femtosecond laser 1 passes through a half-wave plate 2, and the beam splitter 3 splits the laser beam: a beam of laser irradiation and a power meter Probe 15, another beam of laser light passes through the first reflector 4, the second reflector 5, and the aperture diaphragm 6 in turn, then passes through the beam expander 7, enters the vibrating mirror 8, and then passes through the field mirror 9 to focus. The light is irradiated on the underwater processing device 11 fixed on the x, y, z adjustable movable stage 12, the femtosecond laser 1, the control unit 10 of the vibrating mirror, the power meter probe 15 and the computer 13 are connected, through the power met...
Embodiment 2
[0034]Embodiment 2: Same as steps 1)-3) in embodiment 1, step 4) is: Utilize computer 13 to adjust femtosecond laser 1 output laser wavelength to be 1030nm, repetition frequency is 2kHz, pulse width is 240fs, single pulse energy 30μJ~50μJ; step 5) is: use the computer 13 to control the parameters of the femtosecond laser 1, and at the same time use the computer 13 to control the vibrating mirror 8 to control the pulse delay time and trajectory of the laser, the pulse delay time is 5000ms, and the jump speed is 8000mm / s.
[0035] The effect of this embodiment: refer to Figure 4 , the result figure of the micro-nano composite structure current collector obtained in the present embodiment (figure a is a 1000 times magnified overall figure, figure b is a 2000 times magnified view of the hole wall corrugation, and figure c is a 4500 times magnified view of the pore wall corrugation); the obtained The structure has micropores with a diameter of 51 microns, the diameter of the exi...
Embodiment 3
[0036] Embodiment 3: same as step 1)-3) step in embodiment 1, step 4) is: utilize computer 13 to adjust femtosecond laser 1 output laser wavelength to be 1030nm, repetition frequency is 3.3kHz, pulse width is 240fs, single The pulse energy is 30μJ~50μJ; step 5) is: use the computer 13 to control the parameters of the femtosecond laser 1, and use the computer 13 to control the vibrating mirror 8 to control the pulse delay time and trajectory of the laser. The pulse delay time is 3000ms, and the jump speed It is 8000mm / s.
[0037] The effect of this embodiment: refer to Figure 5 , the result figure of the micro-nano composite structure current collector obtained in the present embodiment (figure a is a 1000-fold magnified overall figure, and figure b is a 4000-fold magnified pore wall corrugated figure); the resulting structure has a micropore with a diameter of 54 microns, and the micropore The diameter of the outlet is 42 microns, and there are micro-nano holes with a diamet...
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Abstract
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