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Gel polymer lithium-ion electrolyte and battery containing same

A technology of gel polymer and electrolyte, which is applied in the field of electrolyte, can solve the problems of liquid analysis failure, etc., and achieve the effect of strong wrapping ability, good low temperature performance and good adaptability

Inactive Publication Date: 2017-05-03
DEYANG JIUDING ZHIYUAN INTPROP OPERATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adding a liquid organic solvent with high dielectric constant and low relative molecular mass such as PC to the solid polymer electrolyte can greatly improve the solubility of the conductive salt. The electrolyte formed is the GPE gel polymer electrolyte, which has a high Excellent ionic conductivity, but it will fail due to liquid separation during use

Method used

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  • Gel polymer lithium-ion electrolyte and battery containing same

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0019] Polymerize terephthalic acid with 1,2-propylenediamine and ethylenediamine at a molar ratio of 1:1 to form two prepolymers, and the molecular weight of the prepolymers can be controlled at less than 3000 .

[0020] Mix ethylene carbonate lithium ion solvent, crosslinking agent divinylbenzene, initiator, terephthalic acid, 1,2-propylenediamine, and ethylenediamine in proportion.

[0021] Stir evenly, at room temperature, use vacuum liquid injection equipment to infiltrate the separator and positive and negative electrode materials; seal the above mixture, and fully infiltrate the separator for more than 1 hour; polymerize at 60°C-70°C to form a colloid.

[0022] Wherein the parts by weight of each component are as follows:

[0023] Lithium ion solvent: 100 parts (1.15mol / L, lithium salt is LiBF4), 10 parts of terephthalic acid monomer; parts; two prepolymers were 10 parts and the normal amount of cross-linking agent and initiator.

specific Embodiment 2

[0025] Isophthalic acid is polymerized with tetramethylpropylenediamine and N,N'-bis(3-aminopropyl)-1,4-butanediamine respectively according to a molar ratio of 1:1 to form two kinds of pre- Polymer, the molecular weight of the prepolymer can be controlled at less than 3000.

[0026] Propylene carbonate lithium ion solvent, crosslinking agent divinylbenzene, initiator, isophthalic acid monomer and tetramethylpropylenediamine, N,N'-bis(3-aminopropyl)-1,4 -Butanediamine mixed in proportion.

[0027] Stir evenly, at room temperature, use vacuum liquid injection equipment to infiltrate the separator and positive and negative materials; seal the above mixture, and fully infiltrate the separator for more than 1 hour; polymerize at 30°C-70°C to form a colloid.

[0028] Wherein the parts by weight of each component are as follows:

[0029] Lithium ion solvent: 100 parts (1.8mol / L, lithium salt is LiClO4), 10 parts of isophthalic acid monomer; tetramethylpropanediamine, N,N'-bis(3-am...

specific Embodiment 3

[0031] Two kinds of prepolymers are formed by polymerizing phthalic acid with 1,3-propylenediamine and distearylethylenediamine respectively at a molar ratio of 1:1, and the molecular weight of the prepolymers is controlled at less than 3000 is enough.

[0032] Mix dimethyl carbonate lithium ion solvent, crosslinking agent divinylbenzene, initiator, phthalic acid, 1,3-propylenediamine, and distearylethylenediamine in proportion.

[0033] Stir evenly, at room temperature, use vacuum liquid injection equipment to infiltrate the separator and positive and negative electrode materials; seal the above mixture, and fully infiltrate the separator for more than 1 hour; polymerize at 35°C to form a colloid.

[0034] Lithium ion solvent: 100 parts (1.7mol / L, LiAsF6), 10 parts of phthalic acid monomer; parts; two prepolymers were 10 parts and the normal amount of cross-linking agent and initiator.

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Abstract

The invention discloses a gel polymer lithium-ion electrolyte and a battery containing the electrolyte, and belongs to the field of lithium batteries. The provided electrolyte is good in low-temperature performance and high in conductivity. The electrolyte comprises an inorganic salt, an organic solvent, a polymer, a cross-linking agent and an initiator, and is characterized in that monomer raw materials of the polymer comprise one binary acid monomer containing a benzene ring structure and two diamine monomers.

Description

technical field [0001] The invention relates to the field of lithium batteries, in particular to an electrolyte. Background technique [0002] Electrolyte is one of the four key materials of lithium-ion batteries (positive electrode, negative electrode, diaphragm, and electrolyte). It is known as the "blood" of lithium-ion batteries and plays the role of conducting electrons between the positive and negative electrodes in the battery. Guarantee of high voltage, high specific energy and other advantages. The electrolyte is generally prepared from high-purity organic solvents, electrolyte lithium salts (such as lithium hexafluorophosphate, LiFL6), necessary additives and other raw materials under certain conditions and in a certain proportion. [0003] The organic solvent is the main part of the electrolyte and is closely related to the performance of the electrolyte. Generally, a high dielectric constant solvent and a low viscosity solvent are used in combination. [0004] ...

Claims

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Application Information

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IPC IPC(8): H01M10/0565H01M10/0525H01M10/058
CPCH01M10/0525H01M10/0565H01M10/058H01M2300/0085Y02E60/10Y02P70/50
Inventor 陈福彦
Owner DEYANG JIUDING ZHIYUAN INTPROP OPERATION CO LTD
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