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Electrolyte and application thereof

An electrolyte and amine technology, applied in the field of electrolyte, can solve the problems of poor interface stability and poor wettability of pole pieces, and achieve the effects of improving wettability, improving low temperature performance, and enhancing ability

Pending Publication Date: 2022-05-27
HUBEI JINQUAN NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The electrolyte described in the above scheme has the problems of high viscosity, poor wettability of the pole piece and poor interfacial stability of the material after the battery is made. properties, thereby improving the low-temperature performance of lithium-ion batteries electrolyte is very necessary

Method used

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  • Electrolyte and application thereof
  • Electrolyte and application thereof
  • Electrolyte and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] The present embodiment provides an electrolyte, and the preparation method of the electrolyte is as follows:

[0031] In an argon-filled glove box, mix dimethyl carbonate (DMC), ethyl methyl carbonate (EMC), ethylene carbonate (EC), and ethyl propionate (EP) in a mass ratio of 30:30:30:10 Mix and prepare 1mol / L LiPF 6 Electrolyte, add vinylene carbonate (VC) and vinyl sulfate (DTD), finally add additive 5-(trifluoromethoxy)pyridine-2amine, stir well to obtain electrolyte, wherein the solubility of VC is 0.03 mol / L, the solubility of DTD is 0.02mol / L, and the solubility of 5-(trifluoromethoxy)pyridin-2amine is 0.1mol / L.

Embodiment 2

[0033] The present embodiment provides an electrolyte, and the preparation method of the electrolyte is as follows:

[0034] In an argon-filled glove box, mix dimethyl carbonate (DMC), ethyl methyl carbonate (EMC), ethylene carbonate (EC), and ethyl propionate (EP) in a mass ratio of 30:30:30:10 Mix and prepare 1mol / L LiPF 6 Electrolyte, add vinylene carbonate (VC) and vinyl sulfate (DTD), and finally add additive 5-(2,2,2-trifluoroethoxy)pyridin-2-amine, stir well to obtain electrolyte, The solubility of VC is 0.03mol / L, the solubility of DTD is 0.02mol / L, and the solubility of 5-(2,2,2-trifluoroethoxy)pyridin-2-amine is 0.2mol / L.

Embodiment 3

[0036] The present embodiment provides an electrolyte, and the preparation method of the electrolyte is as follows:

[0037] In an argon-filled glove box, mix dimethyl carbonate (DMC), ethyl methyl carbonate (EMC), ethylene carbonate (EC), and ethyl propionate (EP) in a mass ratio of 30:30:30:10 Mix and prepare 1mol / L LiPF 6 Electrolyte, add vinylene carbonate (VC) and vinyl sulfate (DTD), finally add additive 5-(trifluoromethoxy)pyridine-2amine, stir well to obtain electrolyte, wherein the solubility of VC is 0.03 mol / L, the solubility of DTD is 0.02mol / L, and the solubility of 5-(trifluoromethoxy)pyridin-2amine is 0.3mol / L.

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Abstract

According to the electrolyte and the application thereof, a polyfunctional amine compound is used as an additive, a pyridine ring, a fluorine-containing alkyl group and an ether bond are introduced, the viscosity of the electrolyte is reduced through screening and combination of solvents, the polyfunctional amine compound is introduced as the additive, and the electrolyte is prepared. The ion transmission capability of the electrolyte is enhanced, the infiltration performance to a pole piece is improved, and the interface stability of an electrode material is improved, so that the low-temperature performance of the lithium ion battery is improved.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and relates to an electrolyte and its application. Background technique [0002] With the rapid development of science and technology, human's demand for energy has increased sharply. As fossil energy such as coal and oil is increasingly depleted, natural energy such as wind energy and solar energy cannot be used stably. Efficient, clean, safe and reusable new energy has become a The focus of all mankind. Lithium-ion batteries have the advantages of high energy density, no memory effect, long service life, clean and pollution-free, etc., and are widely used in various fields, including mobile phones, notebook computers, new energy vehicles and other fields. However, with the expansion of the field of human activities, higher requirements are placed on the performance of lithium-ion batteries in specific environments, especially low-temperature performance. [0003] As an important...

Claims

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Application Information

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IPC IPC(8): H01M10/0567H01M10/0569H01M10/0525
CPCH01M10/0567H01M10/0569H01M10/0525H01M2300/0042Y02E60/10
Inventor 苑丁丁张恒张伟康李迟雷盈刘范芬张勇
Owner HUBEI JINQUAN NEW MATERIALS CO LTD