A kind of heat treatment method of solid electrolyte film and structure of lithium battery

Abstract

The invention relates to the technical field of lithium batteries, and relates to a heat treatment method for a solid electrolyte film and a lithium battery core structure. A heat treatment method for a solid electrolyte film, comprising: providing a solid electrolyte film to be treated with a certain thickness, the solid electrolyte film to be treated is formed on an electrode structure, the solid electrolyte film to be treated includes solid electrolyte molecules; pulses with specific wavelengths and pulse parameters are selected The light source heat-treats the solid electrolyte film to be treated, and the photon energy of the pulse light source with a specific wavelength is greater than or equal to the energy difference before and after the energy level transition of the solid electrolyte molecules; cooling the heat-treated solid electrolyte film. A specific pulse light source is used to heat-treat the solid electrolyte film to be treated, thereby changing the crystal phase structure of the solid electrolyte film to be treated, thereby changing the bulk phase and grain boundary impedance of the solid electrolyte film, and improving the conductivity.

Description

【Technical field】 [0001] The invention relates to the technical field of lithium batteries, in particular to a heat treatment method for a solid electrolyte film and a lithium battery core structure. 【Background technique】 [0002] In the process of preparing lithium batteries, it is necessary to treat the solid electrolyte film according to actual needs. Among them, the heat treatment technology can change the characteristics of the solid electrolyte film, reduce the grain boundary impedance of the solid electrolyte film, thereby improving the conduction of conductive lithium ions; secondly, the heat treatment technology can also improve the interfacial contact performance between the solid electrolyte film and the electrode. Improve and reduce interface impedance, thereby improving battery performance. [0003] The existing technology mainly uses a heater to heat the solid electrolyte film. Due to the uncontrollability of the heating process, it is easy to have a great im...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problem that the capacity retention rate and structural stability of the electrode material are reduced when the solid electrolyte film is heated, the present invention provides a method that can realize a good heat treatment of the solid electrolyte film to improve the conductivity of the solid electrolyte film. and a heat treatment method for a solid electrolyte film that maintains the electrical conductivity of the electrode material

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