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A preparation method of lithium battery electrodes based on laser shock technology

A laser shock, lithium battery technology, applied in battery electrodes, electrode manufacturing, laser welding equipment and other directions, can solve problems such as poor click performance of lithium batteries, and achieve the effect of increasing specific surface area, reducing spacing, and improving electrical conductivity

Active Publication Date: 2021-12-07
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is: the technical problem that the click performance of the lithium battery produced by the existing lithium battery electrode preparation method based on the laser shock technology is poor

Method used

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  • A preparation method of lithium battery electrodes based on laser shock technology
  • A preparation method of lithium battery electrodes based on laser shock technology
  • A preparation method of lithium battery electrodes based on laser shock technology

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Experimental program
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Embodiment

[0037] A preparation method of lithium battery electrodes based on laser shock technology:

[0038] Step 1: Lay a layer of absorbent layer 4 (black polytetrafluoroethylene tape) on the surface of the clean copper foil 1; lay a layer of constrained layer 3 (water) on the top of the absorbent layer 4; lay the absorbent layer 4 and the constrained layer 3 is fixed on the fixture 5 of the six-axis robot 21; according to the production plan, determine the various parameters of the laser shock; use the laser 24 (Q-switched Nd:YAG laser) to output the laser beam 5, and the laser first changes through the optical device 22 transmission direction and focusing, and then penetrate the constrained layer 3 and be absorbed by the absorbing layer 4 to generate a plasma explosion to form a shock wave, which impacts on the copper foil 1 to form a micro-pit array, and obtains the pretreated copper foil 6 (such asfigure 1 As shown, the arrow above the constraint layer 3 in the figure is the movin...

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Abstract

The invention discloses a preparation method of a lithium battery electrode based on laser shock, which is characterized in that an absorbing layer and a constrained layer are laid on the surface of copper foil, and laser treatment is performed; silicon nanoparticles and polyvinylpyrrolidone are added to ethanol for encapsulation. end to obtain a stable silicon nanoparticle dispersion; drop-coat the silicon nanoparticle dispersion on the pretreated copper foil, then drop-coat the graphene oxide dispersion after drying, and cycle in turn; the sample that has been drip-coated is ultrasonically Shock treatment, then laying an absorbing layer and a constrained layer on the surface, performing laser treatment, and finally performing annealing treatment to obtain a lithium battery electrode. The invention provides a preparation method of a lithium battery electrode which is environment-friendly, highly controllable and has a large battery capacity.

Description

technical field [0001] The invention relates to a lithium battery electrode preparation method based on laser shock technology, belonging to the field of battery electrode manufacturing. Background technique [0002] As a battery with high energy density, long service life and high output power, lithium-ion battery is widely used in electronic products, military products and aerospace products. Lithium battery electrodes, especially anodes, have a great influence on the maximum performance of lithium-ion batteries. Silicon and graphene are often used as electrode materials for batteries due to their excellent electrical conductivity. [0003] Silicon is a common element that often exists in nature in the form of silicate or silicon dioxide. Elemental silicon is a good semiconductor material and is often used to manufacture electrical components such as transistors, photovoltaic cells, and chips. It is a widely used anode material. However, silicon-based materials will und...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/04H01M4/66H01M10/0525B23K26/352B23K26/356
CPCB23K26/352B23K26/356H01M4/0402H01M4/661H01M10/0525Y02E60/10
Inventor 李康妹何幸哲胡俊蔡宇虞宙
Owner DONGHUA UNIV
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