Lithium ion battery electrolyte and secondary battery containing lithium ion battery electrolyte

A lithium-ion battery and electrolyte technology, applied in the field of electrochemistry, can solve problems such as safety, capacity, and cycle performance attenuation, and achieve the effects of improving charge/discharge cycle performance, widening the electrochemical window, and increasing battery capacity

Inactive Publication Date: 2014-04-09
JIANGXI YOULI NEW MATERIALS
View PDF4 Cites 27 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The requirements of the future market for batteries are: high energy density, long-term power supply; good cycle performance, long service life; wide electrochemical window, the difference in temperature between north and s

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
  • Lithium ion battery electrolyte and secondary battery containing lithium ion battery electrolyte

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] Preparation method of battery:

[0032] Positive electrode preparation: mix according to the positive electrode formula above, and then disperse in N-methyl-2-pyrrolidone to prepare a slurry. The slurry is coated on a thin aluminum foil and dried to make a positive electrode sheet.

[0033] Negative electrode preparation: mix according to the above-mentioned negative electrode formula, and then disperse in N-methyl-2-pyrrolidone to prepare a slurry. The slurry is coated on a thin copper foil and dried to make a negative electrode sheet.

[0034] Electrolyte preparation: According to the above electrolyte formula, under the protection of argon, prepare the electrolyte according to the above ratio in a glove box, and strictly control the influence of moisture and other substances.

[0035] The positive electrode sheet, negative electrode sheet and electrolyte of the lithium ion battery prepared above were manufactured by a conventional method to manufacture a model 5234...

Embodiment 1

[0037] Except that the electrolyte composition is inconsistent with the comparative example, its implementation steps are the same as those described in the comparative example.

[0038] Electrolyte composition: The electrolyte contains organic solvents, lithium salts and functional additives. The components of the organic solvent and additives and their mass percentages are: the organic solvent is ethylene carbonate (EC): dimethyl carbonate (DMC): ethylmethyl carbonate (EMC) (mass ratio 1:1:1), Lithium salt is LiPF 6 Mix it with LiODFB in a ratio of 10:1.2, the concentration of the substance in the electrolyte is 1 mol / L, then add 3% 1,3-propene sultone of the total weight of the electrolyte to the solution, the electrolyte 1% of the total weight of vinylene carbonate, add p-fluorotoluene according to 10% of the total weight of the electrolyte, add fluoroalkylsulfonic acid according to 0.15% of the total weight of the electrolyte, and add hexamethasone according to 0.5% of t...

Embodiment 2

[0041] Except that the electrolyte composition is inconsistent with the comparative example, its implementation steps are the same as those described in the comparative example.

[0042] Electrolyte composition: The electrolyte contains organic solvents, lithium salts and functional additives. The components of the organic solvent and additives and their mass percentages are: the organic solvent is ethylene carbonate (EC): dimethyl carbonate (DMC): ethylmethyl carbonate (EMC) (mass ratio 1:1:1), Lithium salt is LiPF 6Mix it with LiODFB at a ratio of 10:1.2, and the concentration of its substance in the electrolyte is 1 mol / L, then add 1% vinyl sulfite of the total weight of the electrolyte to the solution, and 1.5% of the total weight of the electrolyte Vinyl vinylene carbonate, add 2-fluorotoluene according to 5% of the total weight of the electrolyte, add fluoroalkylsulfonic acid according to 0.15% of the total weight of the electrolyte, add toluenesulfonic acid according t...

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 a lithium ion battery electrolyte and a secondary battery containing the lithium ion battery electrolyte, and relates to the technical field of electrochemistry. The lithium ion battery electrolyte contains a lithium salt, an organic solvent, 0.5-5% by weight of a film-forming additive, 1-15% by weight of a fluorobenzene compound, 0.01-0.5% of a wetting agent, and 0.01-2% of a stabilizer. The lithium ion secondary battery comprises a positive electrode material, a negative electrode material and an electrolyte, wherein the positive electrode material comprises, by mass, 85% of LiCoO2, 7.5% of polyvinylidene fluoride (PVDF) and 7.5% of conductive carbon black SP, and the negative electrode material comprises, by mass, 90% of high compactness graphite, 7% of polyvinylidene fluoride (PVDF) and 3% of conductive carbon black SP. According to the present invention, the battery capacity can be increased, the charge/discharge cycle performance can be improved, and the electrochemical window can be widened.

Description

technical field [0001] The invention relates to the technical field of electrochemistry, in particular to an electrolyte solution for a lithium ion battery and a secondary battery containing the electrolyte solution. Background technique [0002] With the shortage of oil and other resources and the deterioration of the environment, lithium-ion secondary batteries have become one of the new green energy sources, and have been widely used in electronic equipment, mobile communication equipment, transportation equipment and other fields. [0003] The performance of lithium-ion batteries is greatly affected by the performance of the positive electrode, negative electrode, and electrolyte. The positive active material is mainly lithium cobalt oxide (LiCoO 2 ), lithium manganate (LiMn 2 o 4 ), ternary, etc., reversibly deintercalate lithium ions with the electrolyte, showing a high reversible electrode potential. The negative electrode active material is mainly selected from c...

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
IPC IPC(8): H01M10/056H01M10/0525H01M10/058
CPCY02E60/122H01M10/0525H01M10/0567Y02E60/10Y02P70/50
Inventor 李雪铖王超颜果春齐爱
Owner JIANGXI YOULI NEW MATERIALS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap