Preparation method of solid-state lithium ion battery comprising solid electrolyte

Abstract

The invention discloses a preparation method of a solid-state lithium ion battery comprising a solid electrolyte; the preparation method comprises the following steps of step 1, enabling a polymer monomer 1, 3-dioxolane and a first lithium salt to be dissolved in a small molecular solvent to prepare a first mixed solution; step 2, dissolving a polymerization reaction initiator and a second lithiumsalt to be dissolved in a in a small molecular solvent to prepare a polymerization reaction initiator liquid; step 3, dissolving tetraethyl orthosilicate and a third lithium salt into formic acid toprepare a second mixed solution; step 4, mixing the first mixed solution, the polymerization reaction initiator liquid and the second mixed solution to obtain a solid electrolyte solution; and step 5,injecting the solid electrolyte solution into a pre-prepared solid lithium ion battery which is not sealed and is not injected with an electrolyte, then drying, and sealing to obtain the assembled solid-state lithium ion battery. According to the preparation method, the room temperature electrical conductivity of the solid electrolyte can be improved, and the problem of poor interface contact ofthe solid electrolyte can be effectively solved.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a preparation method of a solid lithium ion battery containing a solid electrolyte. Background technique [0002] At present, lithium-ion batteries have the advantages of high voltage, high specific energy, many cycle times, and long storage time. They are widely used in consumer electronics, new energy vehicles, and energy storage. The electrical performance, service life and The study of safety performance is extremely important. [0003] For solid-state lithium-ion batteries, their high energy density and high safety have attracted much attention. In terms of the safety performance of the battery cell, traditional lithium-ion batteries have safety risks of leakage, fire, combustion, or even explosion, while solid-state lithium-ion batteries use solid-state or solid-state electrolytes, which reduce the risk of leakage, fire, combustion, and even explosion. secur...

AI Technical Summary

Problems solved by technology

[0006] Therefore, in view of the low conductivity and poor interface contact of the polymer solid electrolyte used in solid-state batteries, there is an urgent need for a solid-state electrolyte technology to improve the room-temperature conductivity of the solid-state electrolyte and realize the connection between the solid-state electrolyte and the electrode active material. , and the soft contact between the solid electrolyte and the electrode, to solve the problem of the solid-solid interface between the solid electrolyte and the electrode active material and between the solid electrolyte and the electrode

In addition, the harsh manufacturing environment of the solid-state battery manufacturing process needs to be improved urgently

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