Unlock instant, AI-driven research and patent intelligence for your innovation.

Electrolyte and battery containing same

An electrolyte and battery technology, which is applied in the field of electrolyte, can solve the problems of battery performance deterioration, low battery thickness expansion rate, and reduce high-temperature storage gas production, so as to facilitate ion migration, improve high-temperature storage performance, and suppress reduction reactions. Effect

Active Publication Date: 2022-05-13
ZHUHAI COSMX BATTERY CO LTD
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to improve a series of problems in the prior art, such as the deterioration of battery performance caused by the strong oxidation of high-nickel positive electrode materials, the present invention provides an electrolyte and a battery containing the electrolyte. The electrolyte is suitable for assembly of high-nickel positive electrode materials. battery, and the battery assembled with the electrolyte has excellent high-temperature cycle performance and high-temperature storage life, which can significantly reduce the gas production during high-temperature storage (the thickness expansion rate of the battery after high-temperature storage is low), and the battery also has good Thermal shock performance and low temperature discharge performance

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Electrolyte and battery containing same
  • Electrolyte and battery containing same
  • Electrolyte and battery containing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] This embodiment provides an electrolyte, which is composed of cyclic carbonates, chain carbonates, lithium salts and additives.

[0070] The additives include a first additive and a second additive, the first additive is selected from compound 1, the second additive is selected from compounds shown in formula III, the cyclic carbonate is ethylene carbonate, and the chain The carbonate is dimethyl carbonate, and the lithium salt is LiPF 6 .

[0071] The mass ratio of the cyclic carbonate to the chain carbonate is 1:2.5; the quality of the lithium salt is 13wt% of the total mass of the electrolyte; the quality of the first additive is 13wt% of the electrolyte 0.3 wt% of the total mass; the mass of the second additive is 1.2 wt% of the total mass of the electrolyte.

[0072] The present invention provides a preparation method of the above-mentioned electrolyte, which comprises the following steps: stirring and mixing the formulated amount of cyclic carbonate, chain carbo...

Embodiment 2

[0074] This embodiment provides an electrolyte, which is composed of cyclic carbonates, chain carbonates, lithium salts and additives.

[0075] The additives include a first additive and a second additive, the first additive is selected from compound 2, the second additive is selected from compounds shown in formula III, the cyclic carbonate is gamma-butyrolactone, the Chain carbonate is ethyl methyl carbonate, and the lithium salt is LiPF 6 .

[0076] The mass ratio of the cyclic carbonate to the chain carbonate is 1:2; the quality of the lithium salt is 13wt% of the total mass of the electrolyte; the quality of the first additive is 13wt% of the electrolyte. 0.3 wt% of the total mass; the mass of the second additive is 1.2 wt% of the total mass of the electrolyte.

[0077] The present invention provides a preparation method of the above-mentioned electrolyte, which comprises the following steps: stirring and mixing the formulated amount of cyclic carbonate, chain carbonate...

Embodiment 3

[0079] This embodiment provides an electrolyte, which is composed of cyclic carbonates, chain carbonates, lithium salts and additives.

[0080] The additives include a first additive and a second additive, the first additive is selected from compound 3, the second additive is selected from compounds shown in formula III, the cyclic carbonate is propylene carbonate, and the chain The carbonate is diethyl carbonate, and the lithium salt is LiPF 6 .

[0081] The mass ratio of the cyclic carbonate and chain carbonate is 1:3; the quality of the lithium salt is 13wt% of the total mass of the electrolyte; the quality of the first additive is 13wt% of the electrolyte 0.3 wt% of the total mass; the mass of the second additive is 1.2 wt% of the total mass of the electrolyte.

[0082] The present invention provides a preparation method of the above-mentioned electrolyte, which comprises the following steps: stirring and mixing the formulated amount of cyclic carbonate, chain carbonate,...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides an electrolyte and a battery containing the electrolyte, the electrolyte comprises an electrolyte salt, an organic solvent and an additive, and the additive comprises a first additive and a second additive; the first additive is selected from sulfonamide compounds, and the second additive is selected from sulfonate compounds. Through the synergistic effect of the first additive and the second additive, a film can be formed on the surface of a positive electrode, direct contact between an electrode material and an electrolyte is avoided, the microstructure of the electrode material is stabilized, dissolution of transition metal elements at high temperature is reduced, and an SEI film can be formed on the surface of a negative electrode material; the reduction reaction of the solvent on a negative electrode interface is inhibited, and the high-temperature storage performance, the high-temperature cycle performance, the low-temperature discharge performance and the thermal shock performance of the battery can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of batteries, and relates to an electrolytic solution and a battery containing the electrolytic solution. Background technique [0002] In many application fields, people put forward higher requirements for battery life. In order to improve the energy density of batteries, it is one of the effective ways to develop positive electrode materials for batteries with high specific capacity. [0003] High-nickel cathode materials have become a research hotspot due to their higher theoretical specific capacity than other cathode materials. Currently common high-nickel cathode materials include NCM811 (LiNi 0.8 co 0.1 mn 0.1 o 2 ), NCA (LiNi 0.8 co 0.15 al 0.05 o 2 )Wait. [0004] However, the high content of nickel metal in the high-nickel cathode material makes it highly oxidizable, causing the electrolyte to easily undergo electrochemical oxidation reactions on the surface of the cathode, and at the same...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567H01M10/0525
CPCH01M10/0567H01M10/0525H01M2300/0025Y02E60/10
Inventor 王海李素丽李俊义徐延铭
Owner ZHUHAI COSMX BATTERY CO LTD