Electrolyte for lithium-ion battery made of ternary cathode materials and lithium-ion battery made of ternary cathode materials

A lithium-ion battery and cathode material technology, applied in the field of ternary cathode material lithium-ion battery electrolyte, ternary cathode material lithium-ion battery, can solve the problem of affecting battery performance, ternary material specific surface area, battery cycle performance, high temperature Storage performance can not be satisfied and other problems, to achieve good infiltration and diffusion effect, improve high temperature performance, and improve the effect of long-life cycle performance

Active Publication Date: 2016-02-24
DONGGUAN SHANSHAN BATTERY MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the ternary power battery electrolyte of 4.35V and above on the market is still immature. The main problem is that the ternary material has a large specific surface area and the Ni element with stronger oxidizing ability in the system can chemically interact with the electrolyte, thereby Affect the performance of the battery, especially the cycle performance and high temperature storage performance of the battery cannot be satisfied

Method used

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  • Electrolyte for lithium-ion battery made of ternary cathode materials and lithium-ion battery made of ternary cathode materials
  • Electrolyte for lithium-ion battery made of ternary cathode materials and lithium-ion battery made of ternary cathode materials
  • Electrolyte for lithium-ion battery made of ternary cathode materials and lithium-ion battery made of ternary cathode materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] In a glove box filled with argon (moisture 6 , and stirred until it was completely dissolved to obtain the lithium-ion battery electrolyte of Example 1.

[0047] The lithium-ion battery electrolyte prepared above is respectively injected into a soft-packed lithium-ion battery in which the positive electrode active material is nickel cobalt manganese oxide, and the negative electrode active material is graphite. Sub-encapsulation, capacity separation and other processes to obtain the ternary cathode material lithium-ion battery to be tested.

Embodiment 2

[0049] In a glove box filled with argon (moisture 6 , and stirred until it was completely dissolved to obtain the lithium-ion battery electrolyte of Example 2.

[0050] The lithium-ion battery electrolyte prepared above is respectively injected into a soft-packed lithium-ion battery in which the positive electrode active material is nickel cobalt manganese oxide, and the negative electrode active material is graphite. Sub-encapsulation, capacity separation and other processes to obtain the ternary cathode material lithium-ion battery to be tested.

Embodiment 3

[0052] In a glove box filled with argon (moisture 6 , and stirred until it was completely dissolved to obtain the lithium-ion battery electrolyte of Example 3.

[0053] The lithium-ion battery electrolyte prepared above is respectively injected into a soft-packed lithium-ion battery in which the positive electrode active material is nickel cobalt manganese oxide, and the negative electrode active material is graphite. Sub-encapsulation, capacity separation and other processes to obtain the ternary cathode material lithium-ion battery to be tested.

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Abstract

The invention relates to the technical field of lithium-ion batteries, in particular to electrolyte for a lithium-ion battery made of ternary cathode materials and the lithium-ion battery made of the ternary cathode materials. The electrolyte for the lithium-ion battery comprises a non-aqueous organic solvent, lithium salt and additives, and the additives comprise fluoroethylene carbonate, sulfur-containing organic matters and fluoro-ether. By comparison with the prior art, due to the synergistic effect of the three additives including fluoroethylene carbonate, sulfur-containing organic matters and fluoro-ether, the lithium-ion battery made of the ternary cathode materials has excellent cycle performance and high-temperature storage performance under the high-potential condition of 4.35 V or higher, thus, the lithium-ion battery has a wide application prospect in a ternary battery system.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a ternary positive electrode material lithium ion battery electrolyte and a ternary positive electrode material lithium ion battery. Background technique [0002] Lithium-ion batteries are widely used in 3C digital products, electric vehicles and other fields due to their high working voltage, high energy density, long cycle life, and environmental friendliness. The application of lithium-ion batteries in new energy vehicles will show a trend of heavy growth in the next few years. According to the "Energy Saving and New Energy Vehicle Industry Development Plan", power batteries require an energy density of 300Wh / Kg by 2020. Therefore, it is imperative to develop battery systems with high energy density. [0003] At present, there are mainly two types of lithium-ion batteries used in the field of new energy vehicles, one is lithium iron phosphate (LFP) batteries as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M10/0567
CPCH01M10/0525H01M10/0567H01M2300/0042Y02E60/10
Inventor 周文超朱学全姜彬杨春容
Owner DONGGUAN SHANSHAN BATTERY MATERIALS
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