Solid electrolyte, preparation method thereof and all-solid-state battery

Abstract

The invention discloses a solid electrolyte, and belongs to the field of batteries. The solid electrolyte is provided with pore passages with a specific recognition function for conducting particles.Moreover, the invention discloses a preparation method of the solid electrolyte. The preparation method comprises the following steps: adopting a molecular imprinting technique to take polymer monomers and a lithium salt as functional monomers and the conducting particles as template molecules, adding an initiator and a cross-linking agent to be dissolved into a solvent for cross-linking polymerization so as to form a polymer network structure coated with the lithium salt and the conducting particles, then using an eluent to wash the conducting particles inside the polymer network structure, and after removing the solvent, forming the solid electrolyte provided with the pore passages with the specific recognition function for conducting particles. The invention also discloses a positive plate, a negative plate, an aluminum plastic film and an all-solid-state battery of the solid electrolyte. The solid electrolyte disclosed by the invention has high ionic conductivity, and is high in compatibility with a positive and negative interface and small in interface impedance, so that the electrical performance of the all-solid-state battery prepared by using the solid electrolyte is greatly improved.

Description

technical field [0001] The invention belongs to the field of batteries, and relates to a solid electrolyte, a preparation method of the solid electrolyte, and an all-solid battery including the solid electrolyte. Background technique [0002] In recent years, with the rapid development of telecommunications, electric vehicles and other industries, rechargeable batteries for power, energy storage and other purposes have also shown rapid growth. The improvement of global environmental protection requirements and the development of new vehicles such as electric vehicles will promote the rapid development of battery industries such as lithium-ion batteries, lithium-sulfur batteries and lithium-air batteries. However, there are certain safety problems in the actual application of rechargeable batteries, mainly because the organic electrolyte in them is prone to volatilization and leakage, which can easily induce safety accidents such as fire and explosion. The all-solid-state ba...

AI Technical Summary

Problems solved by technology

However, solid-state electrolytes have the characteristics of poor compatibility with the electrode interface, large interface impedance, and low ionic conductivity, which limit the research progress of solid-state batteries.

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