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Ultrafast laser three-dimensional micro-nanometer texturing method for surfaces of copper foil current collectors on negative poles of lithium ion batteries

A lithium-ion battery, ultrafast laser technology, applied in electrode carriers/current collectors, electrode manufacturing, secondary batteries, etc., can solve problems such as environmental pollution, environmental damage, and singleness, and achieve the effect of improving scientificity

Inactive Publication Date: 2019-08-09
SHANGHAI UNIV OF ENG SCI +3
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Problems solved by technology

[0002] Traditional energy sources such as coal and oil have caused huge damage to the environment while promoting the rapid increase in productivity. my country's long-term coal-based energy structure and single energy consumption model have brought serious environmental pollution

Method used

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  • Ultrafast laser three-dimensional micro-nanometer texturing method for surfaces of copper foil current collectors on negative poles of lithium ion batteries
  • Ultrafast laser three-dimensional micro-nanometer texturing method for surfaces of copper foil current collectors on negative poles of lithium ion batteries
  • Ultrafast laser three-dimensional micro-nanometer texturing method for surfaces of copper foil current collectors on negative poles of lithium ion batteries

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Embodiment Construction

[0029] Combine below figure 1 and figure 2 The present invention is described in further detail.

[0030] (1) Select a piece of smooth copper foil for lithium-ion battery negative electrode and pretreat it, mainly including cutting the smooth copper foil into multiple smooth copper foil current collectors that meet the size requirements, and cutting multiple smooth copper foils After the current collector was ultrasonically cleaned in acetone, it was taken out, rinsed with distilled water, and dried for later use.

[0031] (2) Using ultrafast lasers to perform characteristic differentiation of three-dimensional micro-nano textures on the surface of multiple smooth copper foil current collectors, such as figure 1 The three-dimensional micro-nano texture of the hole array, the three-dimensional micro-nano texture of the groove array and the three-dimensional micro-nano texture of the orthogonal square column array are shown, and the depth of the three-dimensional micro-nano tex...

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Abstract

The invention belongs to the field of laser processing, and relates to an ultrafast laser three-dimensional micro-nanometer texturing method for the surfaces of copper foil current collectors on negative poles of lithium ion batteries. Ultrafast laser is adopted for three-dimensional micro-nanometer texturing of the surfaces of the copper foil current collectors; the screening process comprises the following steps: glaze copper foil current collectors and characteristic-different three-dimensional micro-nanometer textured copper foil current collectors are assembled with batteries; the performances of the batteries are tested to build a relation between the different three-dimensional micro-nanometer texturing characteristics and the performances of the batteries; and the three-dimensionalmicro-nanometer texturing characteristics for improving the performances of the batteries are screened, and are textured on the surfaces of the copper foil current collectors. The method is used formicro-nanometer texturing of the copper foil current collectors by the ultrafast laser to form functional surface microstructures on the surfaces of the current collectors; the characteristics and thefunctions thereof are improved; the copper foil current collectors and electrode materials are tightly engaged, so that the interface internal resistance and the volume change degree of the electrodematerials are reduced, the specific surface area of the current collectors and the adhesion quantity of the electrode materials are improved, the corrosion of the current collectors by electrolyte isreduced, and the performances of the batteries are improved; and the method is scientific and reasonable, and is accurate and reliable in result.

Description

technical field [0001] The invention belongs to the technical field of laser processing, and in particular relates to an ultrafast laser three-dimensional micro-nano texturing method on the surface of a negative electrode copper foil collector of a lithium ion battery. Background technique [0002] Traditional energy sources such as coal and oil have caused huge damage to the environment while promoting the rapid increase in productivity. my country's long-term coal-based energy structure and single energy consumption model have brought serious environmental pollution. In recent years, the concept of sustainable development that "lucid waters and lush mountains are golden mountains and silver mountains" has been deeply rooted in the hearts of the people. Human beings urgently need to adjust the energy structure and explore various green and environmentally friendly alternative energy sources. Lithium-ion battery is a green high-energy rechargeable chemical power source with ...

Claims

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Application Information

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IPC IPC(8): B23K26/36B23K26/60H01M4/04H01M4/70H01M10/0525
CPCB23K26/36B23K26/60H01M4/04H01M4/70H01M10/0525Y02E60/10
Inventor 赵万芹梅雪松周云申郭鹏峰孙孝飞
Owner SHANGHAI UNIV OF ENG SCI
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