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A kind of lithium battery electrolyte and its preparation method and lithium battery

A technology of electrolyte and lithium battery, which is applied in the field of lithium battery electrolyte and its preparation, can solve the problems of electrolyte stability reduction, temperature sensitivity, safety hazards, etc., achieve high and low temperature performance and safety, prolong service life, good job effect

Active Publication Date: 2022-02-11
HUIZHOU WES NEW ENERGY LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing lithium battery electrolyte has poor stability and is sensitive to temperature, especially in a high temperature environment, the stability of the lithium battery electrolyte will decrease sharply, posing a great potential safety hazard

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh the following raw materials in parts by weight according to the ratio: 60 parts of lithium hexafluorophosphate, 6 parts of borosilicate glass powder, 120 parts of organic solvent, 10 parts of film-forming additives, 15 parts of modified silica nanoparticles, 4 parts of multilayer graphene parts, 8 parts of modified polyethylene glycol, and 13 parts of phase-change energy storage materials. First, fully stir and mix lithium hexafluorophosphate, borosilicate glass powder, and organic solvent to obtain mixture A, which can be effectively adsorbed by borosilicate glass powder Fluoride ions play a passivation role, prevent it from reacting with water molecules to produce excessive hydrofluoric acid, reduce the corrosion effect of hydrofluoric acid on the positive and negative electrodes, and prolong the service life of the product. Then, the modified silica nanoparticles, Multi-layer graphene, modified polyethylene glycol, and phase-change energy storage materials are f...

Embodiment 2

[0038] Weigh the following raw materials in parts by weight according to the ratio: 65 parts of lithium hexafluorophosphate, 7 parts of borosilicate glass powder, 125 parts of organic solvent, 12 parts of film-forming additives, 18 parts of modified silica nanoparticles, 5 parts of multilayer graphene parts, 10 parts of modified polyethylene glycol, and 14 parts of phase-change energy storage materials. First, fully stir and mix lithium hexafluorophosphate, borosilicate glass powder, and organic solvent to obtain mixture A, which can be effectively adsorbed by borosilicate glass powder Fluoride ions play a passivation role, prevent it from reacting with water molecules to produce excessive hydrofluoric acid, reduce the corrosion effect of hydrofluoric acid on the positive and negative electrodes, and prolong the service life of the product. Then, the modified silica nanoparticles, Multi-layer graphene, modified polyethylene glycol, and phase-change energy storage materials are ...

Embodiment 3

[0046] Weigh the following raw materials in parts by weight according to the ratio: 70 parts of lithium hexafluorophosphate, 8 parts of borosilicate glass powder, 130 parts of organic solvent, 13 parts of film-forming additives, 20 parts of modified silica nanoparticles, 6 parts of multilayer graphene parts, 10 parts of modified polyethylene glycol, and 15 parts of phase-change energy storage material. First, fully stir and mix lithium hexafluorophosphate, borosilicate glass powder, and organic solvent to obtain mixture A, which can be effectively adsorbed by borosilicate glass powder Fluoride ions play a passivation role, prevent it from reacting with water molecules to produce excessive hydrofluoric acid, reduce the corrosion effect of hydrofluoric acid on the positive and negative electrodes, and prolong the service life of the product. Then, the modified silica nanoparticles, Multi-layer graphene, modified polyethylene glycol, and phase-change energy storage materials are f...

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Abstract

The invention discloses a lithium battery electrolyte, which relates to the technical field of lithium batteries, and comprises the following raw materials: lithium hexafluorophosphate, borosilicate glass powder, organic solvents, film-forming additives, modified silicon dioxide nanoparticles, multilayer graphene, Modified polyethylene glycol, phase change energy storage material, the invention also discloses the preparation method of the lithium battery electrolyte, through the modification of silica nanoparticles, the particle size is easy to control, the particle size distribution is narrow, and the biophysical Good chemical stability, good thermal stability, etc., can be stably and evenly dispersed in the electrolyte, improve the high and low temperature performance and safety of the electrolyte, and modify polyethylene glycol to make various substances in the electrolyte system of lithium batteries form The network structure is evenly distributed in the system, which improves the stability of the product, and the synergy between the modified silica nanoparticles and the modified polyethylene glycol further improves the thermal stability; the borosilicate glass powder can Effective adsorption of fluoride ions, prolonging the service life of the product.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a lithium battery electrolyte, a preparation method thereof, and a lithium battery. Background technique [0002] Lithium battery electrolyte is the carrier of ion transport in the battery. Generally composed of lithium salt and organic solvent. The electrolyte plays the role of conducting ions between the positive and negative electrodes of the lithium battery, which is the guarantee for the high voltage and high specific energy of the lithium ion battery. The electrolyte is generally prepared from high-purity organic solvents, electrolyte lithium salts, necessary additives and other raw materials under certain conditions and in a certain proportion. [0003] The existing lithium battery electrolyte has poor stability and is sensitive to temperature. Especially in a high temperature environment, the stability of the lithium battery electrolyte will decrease sharply, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0525H01M10/056H01M10/058
CPCH01M10/0525H01M10/056H01M10/058Y02P70/50Y02E60/10
Inventor 肖世玲龙梅宋金涛胡红英陈日宇
Owner HUIZHOU WES NEW ENERGY LIMITED
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