Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Non-aqueous electrolyte of lithium ion battery and battery manufactured by using same

A non-aqueous electrolyte, lithium-ion battery technology, used in secondary batteries, circuits, electrical components, etc., can solve the problems of unstable film formation, capacity attenuation, etc., to improve high-temperature storage performance, improve wettability, and improve The effect of safety features

Active Publication Date: 2012-01-04
HUIZHOU CAPCHEM CHEM CO LTD
View PDF7 Cites 24 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Among them, the first route uses γBL with high flash point and high boiling point as the solvent. Although it can improve the safety performance, when it is used in a battery with graphite as the negative electrode, the film formation of γBL on the graphite negative electrode is unstable. , fast capacity decay

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
  • Non-aqueous electrolyte of lithium ion battery and battery manufactured by using same
  • Non-aqueous electrolyte of lithium ion battery and battery manufactured by using same
  • Non-aqueous electrolyte of lithium ion battery and battery manufactured by using same

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0033] One. The preparation method of embodiment electrolyte

[0034] in an argon-filled glove box (H 2 O<10ppm), high flash point, high boiling point cyclic carbonate, cyclic carboxylate and cyclic sulfite organic solvent, linear fluoroether, lithium salt, film-forming additive and fluorocarbon surfactant The electrolyte mass ratios listed in each embodiment and comparative example in Table 1 were prepared. The above-mentioned raw materials are added in sequence and fully stirred evenly to obtain the lithium-ion battery electrolyte of the present invention, which is used for flammability test and battery performance test.

[0035] Two. The manufacture method of embodiment lithium-ion battery

[0036] The non-aqueous electrolyte secondary battery of the present invention is composed of the above-mentioned non-aqueous electrolyte, a negative electrode and a positive electrode.

[0037] The active material constituting the positive electrode can be LiCoO 2 , LiMn 2 o 4 , L...

Embodiment 1

[0075] The production of the positive electrode: the LiCoO 2 , the conductive agent acetylene black and polyvinylidene fluoride are mixed in a weight ratio of 8:1:1, fully dispersed in N-methylpyrrolidone as a solvent to form a paste, and the paste mixture is uniformly coated on a 20 μm as the positive electrode collector Both sides of the strip-shaped aluminum foil of the electric body. The length of the positive electrode sheet is 413 mm, and then dried to obtain a strip-shaped positive electrode sheet with a thickness of 100 um under a pressure of 0.5-2 MPa.

[0076]Preparation of negative electrode: mix natural graphite and polyvinylidene fluoride at a weight ratio of 9:1, disperse the mixture in deionized water solvent to form a paste, and evenly coat the paste mixture on 15um to serve as the negative electrode collector Both sides of the ribbon copper foil. The length of the negative electrode sheet is 420 mm, and then dried to obtain a strip-shaped negative electrode ...

Embodiment 2

[0083] The same as the process of Example 1, the difference is that the electrolyte ratio is:

[0084] γBL:S 1 :PS=50:30:20, 1.4M LiBF 4 , VC: 1%.

[0085] The obtained electrolyte was used for flammability test and battery performance test. The test results of flammability performance, initial performance and 100 cycle capacity retention at room temperature; the capacity retention rate, capacity recovery rate and thickness expansion rate after high temperature storage are shown in Table 1.

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

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention relates to an organic composition, in particular to non-aqueous electrolyte of a lithium ion battery and a lithium ion secondary battery manufactured by using the same. The non-aqueous electrolyte comprises annular carboxylic ester, annular sulfite, electrolyte salt and isoflurane shown in the following structural formula: Rf1-O-Rf2, wherein Rf1 represents a fluorine-containing alkyl group with 3-4 carbon atoms, and Rf2 represents a fluorine-containing alkyl group with 2-5 carbon atoms. The mass percent of the isoflurane in the electrolyte is 10-50%. The non-aqueous electrolyte also comprises fluorocarbon surfactant so as to further improve the battery performance. The non-aqueous electrolyte can greatly improve the safety performance of the lithium ion battery and obviously improve the electrochemical performance such as cycle performance as well as the high-temperature conservation performance of the lithium ion battery.

Description

technical field [0001] The invention relates to an organic composition, in particular to a lithium-ion battery non-aqueous electrolyte and a lithium-ion secondary battery made thereof. Background technique [0002] Lithium-ion battery is the most competitive battery of the new generation, known as "green energy", and is the preferred technology to solve contemporary environmental pollution and energy problems. In recent years, lithium-ion batteries have achieved great success in the field of high-energy batteries, but consumers still expect batteries with higher comprehensive performance, which depends on the research and development of new electrode materials and electrolyte systems. As an important part of lithium-ion batteries, the electrolyte system of lithium-ion batteries is a key material necessary for lithium-ion batteries. Its performance greatly restricts the development of lithium-ion batteries. At present, the electrolyte of lithium-ion batteries is composed of ...

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): H01M10/0569H01M10/0567H01M10/0525
CPCY02E60/122Y02E60/10
Inventor 占孝云石桥毛玉华周艾平
Owner HUIZHOU CAPCHEM CHEM CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com