Lithium ion battery electrolyte and preparation method thereof

Abstract

The invention provides a lithium ion battery electrolyte which comprises glyceryl ether epoxy resin gel, the glyceryl ether epoxy resin gel comprises glyceryl ether epoxy resin containing ether oxygen groups, the glyceryl ether epoxy resin is a cross-linked polymer obtained by reacting a glycidyl ether polymer with a polyamine compound, and the polyamine compound is a polyamine compound. The glycidyl ether polymer comprises at least two epoxy groups; the polyamine compound comprises at least two amino groups, the cross-linked polymer is of a three-dimensional network structure and comprises a main chain and a plurality of hydroxyl groups, the hydroxyl groups are located on the main chain of the cross-linked polymer, and an epoxy group structure in the glycidyl ether polymer is located on the main chain of the cross-linked polymer; the electrolyte comprises lithium salt and a non-aqueous solvent, the lithium salt is inserted into the three-dimensional network structure of the glyceryl ether epoxy resin, and the lithium salt and the glyceryl ether epoxy resin are dispersed in the non-aqueous solvent. The invention also provides a preparation method of the lithium ion battery electrolyte.

Description

technical field [0001] The invention relates to a lithium ion battery electrolyte and a preparation method thereof, in particular to a glycerol ether epoxy resin electrolyte containing ether oxygen groups and a preparation method thereof. Background technique [0002] With the gradual development of information terminals from mainframes to wearable devices, the demand for flexible electronic devices is also increasing. As the key to flexible electronic devices, flexible energy storage devices are used as energy supply components with broad application prospects, such as wearable electronic devices, implantable medical devices, etc., and are expected to promote such applications. Compared with other energy storage devices, lithium-ion batteries (LIBs) have higher operating voltages and greater energy density, and lithium-ion batteries are considered ideal for flexible energy storage devices. [0003] Glycerol ether-based epoxy resins containing etheroxy groups have excellent...

AI Technical Summary

Problems solved by technology

However, the inherent low oxidation stability of the existing glycerol ether epoxy resin electrolytes containing etheroxy groups has not been substantially resolved, and the oxidation potential of Li-ion electrolytes is still low, which is still difficult to apply to high-voltage cathodes.

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