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A kind of lithium ion battery electrolyte and lithium ion battery

A lithium-ion battery, electrolyte technology, applied in secondary batteries, circuits, electrical components, etc., can solve problems such as poor moisture and free acid effects

Active Publication Date: 2021-08-13
NANTONG CAPCHEM ELECTRONICS MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a lithium-ion battery electrolyte for the poor effect of reducing moisture and free acid in the lithium-ion battery electrolyte in the prior art

Method used

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  • A kind of lithium ion battery electrolyte and lithium ion battery
  • A kind of lithium ion battery electrolyte and lithium ion battery
  • A kind of lithium ion battery electrolyte and lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This embodiment is used to illustrate the lithium ion battery electrolyte disclosed in the present invention.

[0029] In a nitrogen-protected glove box (moisture 6 ) to a molar concentration of 1mol / L, then add 1.5% vinylene carbonate, 1% lithium difluorophosphate, 0.05% polyethylene glycol-methyl ether-capped 1,3 -bis(1-isocyanato-1-methylethyl)benzene homopolymer, after stirring evenly, obtain the lithium-ion battery electrolyte of embodiment 1.

Embodiment 2

[0031] This embodiment is used to illustrate the lithium ion battery electrolyte disclosed in the present invention.

[0032] In a nitrogen-protected glove box (moisture 6) to a molar concentration of 1mol / L, then add 1.5% vinylene carbonate, 1% lithium difluorophosphate, 0.1% polyethylene glycol-methyl ether-capped 1,3 -bis(1-isocyanato-1-methylethyl)benzene homopolymer, after stirring evenly, obtain the lithium ion battery electrolyte of embodiment 2.

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Abstract

In order to overcome the problem of poor effect of reducing moisture and free acid in the lithium-ion battery electrolyte in the prior art, a lithium-ion battery electrolyte is provided, including an organic solvent, a lithium salt and a polymer additive, and the polymer additive includes an aromatic Copolymers or homopolymers of diisocyanates. Simultaneously, the present invention also provides a lithium-ion battery using the above electrolytic solution. The lithium-ion battery adopting the electrolyte solution provided by the invention has low moisture and free acid content, and has stable cycle performance at 45°C, does not swell when stored in an oven at 60°C, has small internal resistance changes, and maintains good storage performance and cycle performance.

Description

technical field [0001] The invention relates to a lithium ion battery electrolyte capable of reducing moisture and acidity, and a lithium ion battery using the lithium ion battery electrolyte. Background technique [0002] Lithium battery electrolyte is the carrier of ion transport in lithium battery. 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. At present, the most mature lithium salt used in the production of commercial lithium-ion batteries is lithium hexafluorophosphate (LiPF 6 ), solvents are mainly carbonates, such as: ethylene carbonate (EC), propylene carbonate (PC), dimethyl carbonate (DMC), etc., and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0567H01M10/0525
CPCH01M10/0525H01M10/0567Y02E60/10
Inventor 殷俊江卫健朱帅朱风艳
Owner NANTONG CAPCHEM ELECTRONICS MATERIALS CO LTD
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