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Non-aqueous electrolyte and lithium ion battery

A non-aqueous electrolyte, lithium-ion battery technology, used in secondary batteries, secondary battery repair/maintenance, circuits, etc., to achieve the effects of improving cycle performance, reducing flammability, and suppressing flammability

Active Publication Date: 2019-06-11
天津新宙邦电子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problems of safety and circulation in the existing lithium-ion non-aqueous electrolyte, the invention provides a non-aqueous electrolyte and a lithium-ion battery

Method used

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  • Non-aqueous electrolyte and lithium ion battery
  • Non-aqueous electrolyte and lithium ion battery

Examples

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Embodiment 1

[0070] This embodiment is used to illustrate a kind of non-aqueous electrolytic solution disclosed by the present invention, lithium ion battery and its preparation method, comprising the following steps:

[0071] The positive electrode preparation step is: mix the positive electrode active material LiNi according to the mass ratio of 95:3:2 0.8 mn 0.1 co 0.1 o 2 , conductive carbon black and binder polyvinylidene fluoride are dispersed in N-methyl-2-pyrrolidone to obtain positive electrode slurry, and the positive electrode slurry is evenly coated on both sides of the aluminum foil, after drying, calendering and Vacuum drying, and welding aluminum lead wires with an ultrasonic welder to obtain a positive plate, the thickness of the positive plate is between 120-150 μm.

[0072] Negative electrode preparation steps are: mix graphite, conductive carbon black, binder styrene-butadiene rubber and carboxymethyl cellulose according to the mass ratio of 94:1:2.5:2.5, disperse in ...

Embodiment 2

[0078] This embodiment is used to illustrate a kind of non-aqueous electrolytic solution disclosed by the present invention, lithium ion battery and its preparation method, including most of the operation steps in embodiment 1, and its difference is:

[0079] In the electrolyte, 1% of the compound 32 is used to replace 1% of the compound 31 based on the total mass of the electrolyte.

Embodiment 3

[0081] This embodiment is used to illustrate a kind of non-aqueous electrolytic solution disclosed by the present invention, lithium ion battery and its preparation method, including most of the operation steps in embodiment 1, and its difference is:

[0082] In the electrolyte, 1% of compound 31 by the total mass of the electrolyte is replaced by 1% of the compound 33 by the total mass of the electrolyte.

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Abstract

The invention provides a non-aqueous electrolyte for overcoming the problems of safety and recyclability of an existing lithium ion non-aqueous electrolyte; the non-aqueous electrolyte comprises a phosphazene compound, wherein the phosphazene compound comprises a composite group and a phosphazene group comprising a -P=N- group, wherein the composite group is selected from boron trifluoride and / orphosphorus pentafluoride; and boron trifluoride and / or phosphorus pentafluoride is in connection with N chemical bond in the phosphazene group. According to the non-aqueous electrolyte provided by theinvention, the cycling performance of the lithium ion battery can be improved, or the flammability of the battery can be inhibited.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and relates to a nonaqueous electrolytic solution and a lithium ion battery. Background technique [0002] Compared with other batteries, lithium-ion batteries have the advantages of light weight, small size, high working voltage, high energy density, high output power, high charging efficiency, no memory effect and long cycle life. For 3C consumer electronics market. And with the development of new energy vehicles, non-aqueous electrolyte lithium-ion batteries are becoming more and more popular as the power supply system of vehicles. However, traditional electrolytes have potential safety hazards due to the use of flammable carbonate solvents. Adding additives that can suppress the flammability of the electrolyte has become a research hotspot in new energy power batteries. With the continuous improvement of the mileage requirements of new energy vehicles, there is an increasing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567H01M10/0525H01M10/42
CPCY02E60/10
Inventor 熊得军石桥曹伟丁祥欢
Owner 天津新宙邦电子材料有限公司
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