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Composition, electrolyte containing composition and lithium ion battery

A composition and electrolyte technology, applied in the field of batteries, can solve problems such as low-temperature cycle improvement effect, failure to meet new needs, instability, etc., to improve high-temperature and low-temperature performance of batteries, overcome high-temperature and low-temperature performance of batteries, reduce The effect of battery internal resistance

Active Publication Date: 2021-03-02
GUANGZHOU TINCI MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to its own instability and the addition of sulfur-containing additives, although it can improve high-temperature performance and low-temperature discharge performance to a certain extent, it has a poor effect on low-temperature cycle improvement, making it unable to meet people's new needs.

Method used

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  • Composition, electrolyte containing composition and lithium ion battery
  • Composition, electrolyte containing composition and lithium ion battery
  • Composition, electrolyte containing composition and lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] In this embodiment, the additives are selected from the above chemical formula I2 and chemical formula II1, and the additives I2 and II1 account for 0.03% and 1% of the weight of the electrolyte respectively; the lithium salt is lithium hexafluorophosphate, and the lithium salt accounts for 13% of the weight of the electrolyte; the solvent is A solvent mixed with ethylene carbonate and dimethyl carbonate at a weight ratio of 1:2; the positive electrode material is LiNi 0.8 co 0.1 mn 0.1 o 2 ; Negative electrode material is artificial graphite; Diaphragm is polyethylene film. Assemble into a pouch battery according to the conventional method.

Embodiment 2

[0088] In this embodiment, the additives are selected from the above chemical formula I2 and chemical formula II1, and the additives I2 and II1 account for 1% and 0.1% of the weight of the electrolyte respectively; the lithium salt is lithium hexafluorophosphate, and the lithium salt accounts for 13% of the weight of the electrolyte; the solvent is A solvent mixed with ethylene carbonate and dimethyl carbonate at a weight ratio of 1:2; the positive electrode material is LiNi 0.8 co 0.1 mn 0.1 o 2 ; Negative electrode material is artificial graphite; Diaphragm is polyethylene film. Assemble into a pouch battery according to the conventional method.

Embodiment 3

[0090] In this embodiment, the additives are selected from the above chemical formula I2 and chemical formula II1, and the additives I2 and II1 account for 1% and 1% of the weight of the electrolyte respectively; the lithium salt is lithium hexafluorophosphate, and the lithium salt accounts for 13% of the weight of the electrolyte; the solvent is A solvent mixed with ethylene carbonate and dimethyl carbonate at a weight ratio of 1:2; the positive electrode material is LiNi 0.8 co 0.1 mn 0.1 o 2 ; Negative electrode material is artificial graphite; Diaphragm is polyethylene film. Assemble into a pouch battery according to the conventional method.

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Abstract

The present invention relates to a composition, an electrolyte containing the composition, and a lithium ion battery, the composition comprises a first component and a second component, the first component comprises at least one sulfur-containing compound having a structure represented by a formula (I), and the second component comprises at least one cyclic carbonate compound having a structure represented by a formula (II); and the composition can be added into an electrolyte as an additive, and can effectively improve the high-temperature and low-temperature performance of the battery.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a composition, an electrolyte containing the composition and a lithium ion battery. Background technique [0002] As one of the new energy storage devices, lithium-ion batteries have the advantages of high energy density, high charging efficiency, long cycle life, etc., coupled with the increasing market demand and policy orientation in recent years, lithium-ion batteries have been vigorously promoted. , are widely used in power, energy storage, aerospace, digital and other fields. [0003] The application fields and application environments of lithium-ion batteries continue to expand, and people's requirements for battery performance continue to increase, such as lower battery internal resistance, excellent high-temperature and low-temperature cycle life. Generally speaking, sulfur-containing additives have a certain effect on reducing the battery impedance, thereby improving...

Claims

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Application Information

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IPC IPC(8): H01M10/0567H01M10/0525H01M10/42
CPCH01M10/0567H01M10/0525H01M10/4235H01M2300/0025Y02E60/10
Inventor 曹哥尽范伟贞赵经纬
Owner GUANGZHOU TINCI MATERIALS TECH
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