System and method for processing nanostructure on surface of electrode for battery by utilizing femtosecond laser

Abstract

The invention provides a system for processing a nanostructure on the surface of an electrode for a battery by utilizing a femtosecond laser. The system for processing the nanostructure on the surface of the electrode for the battery by utilizing the femtosecond laser comprises a femtosecond laser device, an acoustooptic modulator, a reflecting mirror system, a polarization controller, a laser scanning system and a lens, wherein the femtosecond laser device is used for providing a femtosecond laser pulse; the acoustooptic modulator is used for controlling the on / off of the femtosecond laser device and the repetition frequency of the femtosecond laser pulse; the reflecting mirror system is used for guiding the femtosecond laser into the polarization controller; the polarization controller is used for controlling the polarization state, on the surface of a to-be-processed electrode, of the femtosecond laser; the laser scanning system is used for controlling the light spot of a laser to form a pattern on the surface of the electrode; the lens is used for focusing the femtosecond laser pulse on the surface of the electrode. According to the system for processing the nanostructure on the surface of the electrode for the battery by utilizing the femtosecond laser, the nanostructure on the surface of the electrode of the battery is processed by utilizing the femtosecond laser; the superficial area of the electrode can be drastically improved; thus, the effective contact between the surface of the electrode and an electrolyte is greatly enhanced; the diffusion of ions is increased; the capacity of the battery is increased; a charging speed is quickened; the service life is prolonged; moreover, the production cost, which is brought about by an existing high-temperature high-vacuum technique, of the battery is greatly decreased; the yield is improved.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a system and method for processing nanostructures on the surface of battery electrodes by using a femtosecond laser. Background technique [0002] Lithium batteries have become the most widely used batteries in the market due to their high cost performance, especially in clean energy, new energy vehicles and other applications. Nevertheless, lithium batteries have some defects that urgently need to be improved, such as high manufacturing cost, short battery life, potential safety hazards, and slow charging. There are two cores of the lithium battery problem. First, due to the chemical characteristics of the electrode material and the electrolyte, the contact between the electrolyte and the electrode surface is poor, that is, the electrode cannot be completely wetted by the electrolyte, which increases the contact resistance. The long-term vacuum treatment under the condition greatly inc...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a system and method for processing nanostructures on the surface of battery electrodes using femtosecond lasers, aiming to solve the existing problem of poor contact between battery electrodes and electrolyte

Images