High-stability lithium ion battery electrolyte

A power battery and electrolyte technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of reduced battery performance and cycle performance, increased electrolyte acidity and chroma, poor thermal stability of lithium hexafluorophosphate, etc., to achieve color suppression The effect of increasing

Active Publication Date: 2016-12-21
ZHEJIANG JINKAILAI NEW ENERGY TECH
View PDF7 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, lithium hexafluorophosphate has poor thermal stability and is easily decomposed into lithium fluoride and phosphorus pentafluoride. Due to the active chemical properties of phosphorus pentafluoride, it can react with trace proton impurities in the electrolyte, thereby causing electrolyte acidity And the rapid rise of chroma will deteriorate the quality of electrolyte, reduce the performance of battery capacity and cycle 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
  • High-stability lithium ion battery electrolyte
  • High-stability lithium ion battery electrolyte
  • High-stability lithium ion battery electrolyte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] In the embodiment of the present invention, a highly stable lithium-ion power battery electrolyte is composed of 14% lithium hexafluorophosphate, 79% non-aqueous organic solvent, 3.5% electrolyte stabilizer and 3.5% additives in terms of mass percentage; the non-aqueous organic The solvent is isopropyl acetate; the electrolyte stabilizer is composed of hexamethyldisilazane, ethanolamine and triphenyl phosphite, and the molar ratio of hexamethyldisilazane, ethanolamine and triphenyl phosphite is 1:0.5:0.35; the additive is methylene disulfonate.

Embodiment 2

[0020] In the embodiment of the present invention, a highly stable lithium-ion power battery electrolyte is composed of 18% lithium hexafluorophosphate, 71% non-aqueous organic solvent, 6% electrolyte stabilizer and 5% additive in terms of mass percentage; the non-aqueous organic The solvent is a halogenated carbonate; the electrolyte stabilizer is composed of hexamethyldisilazane, ethanolamine and triphenyl phosphite, and the molar ratio of hexamethyldisilazane, ethanolamine and triphenyl phosphite is 1:0.68:0.25; the additive is ammonium acetate.

Embodiment 3

[0022] In the embodiment of the present invention, a highly stable lithium-ion power battery electrolyte is composed of 15% lithium hexafluorophosphate, 78% non-aqueous organic solvent, 3.5% electrolyte stabilizer and 3.5% additives in terms of mass percentage; the non-aqueous organic The solvent is an aromatic hydrocarbon; the electrolyte stabilizer is composed of hexamethyldisilazane, ethanolamine, and triphenyl phosphite, and the molar ratio of hexamethyldisilazane, ethanolamine, and triphenyl phosphite is 1: 0.6:0.3; the additive is methyl trifluoropropionate.

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 discloses a high-stability lithium ion battery electrolyte. The high-stability lithium ion battery electrolyte is prepared from, by mass, 14-18% of lithium hexafluorophosphate, 71-79% of a non-aqueous organic solvent, 3.5-6% of an electrolyte stabilizer and 3.5-5% of additives, wherein the non-aqueous organic solvent is at least one of carboxylic ester, halogenated carbonate, aromatic hydrocarbon and aryl halides, and halogen substitutes in the halogenated carbonate and the aryl halides are at least one of F, Cl and Br; the electrolyte stabilizer is formed by combination of hexamethyl disilazane, ethanol amine and triphenyl phosphate in a mole ratio of 1:(0.5-0.68):(0.25-0.35); the additives are at least one of maleic anhydride, methylene methanedisulfonate, ammonium acetate, fluorocarbonate, fluoroether and phosphazene and derivatives thereof. The high-stability lithium ion battery electrolyte is stable in chromaticity, and prepared batteries are excellent in cycle performance.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a highly stable electrolyte solution for lithium ion power batteries. Background technique [0002] Lithium-ion batteries are widely used in 3C digital products, electric vehicles, military aerospace and other fields due to their high working voltage, high energy density, long cycle life, and environmental friendliness. With the improvement of people's living standards, higher requirements are put forward for the working environment, energy density, and fast charging and discharging of lithium-ion batteries. [0003] As an important part of lithium-ion batteries, the electrolyte plays a role in transporting charges between the positive and negative electrodes of the battery, and is crucial to the capacity performance, cycle performance and high and low temperature performance of the battery. Lithium hexafluorophosphate is currently the only lithium salt used commer...

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): H01M10/0566H01M10/0567
CPCH01M10/0566H01M10/0567Y02E60/10
Inventor 梁文明
Owner ZHEJIANG JINKAILAI NEW ENERGY TECH
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