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

Isocyanate electrolyte additive containing sulfonamide structure group and application thereof

An electrolyte additive and structure-based technology, applied in the field of isocyanate-based electrolyte additives, can solve the problems of electrolyte acid value and chromaticity deterioration, poor thermal stability of vinyl sulfate, affecting high temperature performance of batteries, etc., so as to inhibit electrolyte discoloration. and acid value increase, improve high temperature cycle and high temperature storage performance, good effect of electrolyte stabilizer

Active Publication Date: 2022-02-18
VALIANT CO LTD
View PDF14 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

1,3-Propane sultone (PS) and ethylene sulfate (DTD) are representative additives containing sulfur elements respectively, which have the effect of reducing battery impedance and film-forming additives, but 1,3-Propane sultone (PS ) is controlled by EU regulations, and its use is limited. Vinyl sulfate (DTD) has poor thermal stability. If there is no stabilizer, it will lead to deterioration of the acid value and chromaticity of the electrolyte, thereby affecting the high temperature performance of the battery

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
  • Isocyanate electrolyte additive containing sulfonamide structure group and application thereof
  • Isocyanate electrolyte additive containing sulfonamide structure group and application thereof
  • Isocyanate electrolyte additive containing sulfonamide structure group and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-8 and comparative example 1～5

[0034] The method that battery embodiment 1-8 and comparative example 1~5 lithium-ion battery non-aqueous electrolytes are used for preparing lithium-ion type button battery is:

[0035] (1) Preparation of positive electrode sheet

[0036] LiNi 0.8 co 0.1 mn 0.1 o 2 Powder, carbon black (particle size 1000nm), polyvinylidene fluoride (PVDF) and N, N-dimethylpyrrolidone (NMP) were mixed to make a uniform slurry, and the slurry was uniformly coated on an aluminum foil (15 μm) set fluid, then dried and rolled to obtain LiNi 0.8 co 0.1 mn 0.1 o 2 Cathode material. Bake at 120°C for 12 hours, in the dried pole piece, LiNi 0.8 co 0.1 mn 0.1 o 2 Accounting for 94% of the total coating, the binder accounted for 4%, and carbon black accounted for 2%. Then the obtained pole piece was cut into a disc with a diameter of 8 mm as the positive pole.

[0037] (2) Negative sheet preparation

[0038] Take artificial graphite anode material as an example: artificial graphite, poly...

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 relates to an isocyanate electrolyte additive containing a sulfonamide structure group. The structural formula of the electrolyte additive is shown as a formula I, wherein R1 and R2 are the same or different; R1 and R2 are respectively and independently selected from methyl, ethyl, butyl, methoxyl, methanesulfonyl, ethanesulfonyl, fluorosulfonyl, trifluoromethanesulfonyl, perfluoroethanesulfonyl, benzenesulfonyl, alkyl-containing benzenesulfonyl, cyanogen-containing / fluorine-containing benzenesulfonyl and alkoxy-containing benzenesulfonyl, and R1 and R2 can be linked to form one of a five-membered ring or a six-membered ring. According to the electrolyte additive, sulfonyl and isocyanate structural groups are organically combined together, so that the electrolyte additive has high thermal stability, can play a role of an electrolyte stabilizer, and avoids high-temperature discoloration and acid value increase of an electrolyte. When the electrolyte containing the novel additive provided by the invention is applied to the battery, the high-temperature circulation and high-temperature storage performance is improved, and relatively low impedance is embodied.

Description

technical field [0001] The invention relates to an isocyanate electrolyte additive containing a sulfonamide structural group and an application thereof, belonging to the technical field of lithium battery nonaqueous electrolyte additives. Background technique [0002] Since the commercialization of lithium secondary batteries, due to its high specific energy and good cycle performance, it has been widely used in digital, energy storage, power, military aerospace and communication equipment and other fields. Compared with other secondary batteries, lithium secondary batteries have the advantages of high working voltage, long cycle life, low self-discharge rate, environmental friendliness, and no memory effect. [0003] In lithium-ion batteries, the oxidative decomposition of the electrolyte deteriorates battery performance, and is often accompanied by the dissolution of metal ions during cycling and high-temperature storage, resulting in a serious decline in battery performan...

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
CPCH01M10/0567H01M10/0525H01M2300/0025Y02E60/10C07D339/06C07D339/08H01M10/0569H01M10/0568C07C381/06C07C307/06H01M2300/004
Inventor 王焕杰石宇林存生张善国宣力琪姜恒
Owner VALIANT 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