High-voltage lithium battery electrolyte

An electrolyte and lithium battery technology, which is applied to secondary batteries, circuits, electrical components, etc., can solve problems that affect the safety of batteries, reduce battery life, increase battery internal pressure, etc., achieve high energy density, improve compatibility performance and long cycle life

Inactive Publication Date: 2017-05-31
OPTIMUM BATTERY CO LTD
View PDF3 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the battery voltage reaches about 4.5V (vs. Li/Li+), it is very easy to cause the electrolyte to undergo an oxidation reaction on the surface of the positive electrode material, and then a large amo

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-voltage lithium battery electrolyte
  • High-voltage lithium battery electrolyte
  • High-voltage lithium battery electrolyte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1: at room temperature, ethylene carbonate (EC), dimethyl carbonate (DMC), and ethyl methyl carbonate (EMC) are mixed according to a mass ratio of 1:1:1 in a glove box full of argon, and A phosphazene additive with a mass percentage of 0.5% is added, and lithium hexafluorophosphate (LiPF6) is added to dissolve to a concentration of 1.0 mol / L to prepare an electrolyte.

Embodiment 2

[0033] Embodiment 2: At room temperature, ethylene carbonate (EC), dimethyl carbonate (DMC), and ethyl methyl carbonate (EMC) are mixed according to a mass ratio of 1:1:1 in a glove box full of argon, and A phosphazene additive with a mass percentage of 1% was added, and lithium hexafluorophosphate (LiPF6) was added to dissolve to a concentration of 1.0 mol / L to prepare an electrolyte.

Embodiment 3

[0034] Embodiment 3: at room temperature, ethylene carbonate (EC), dimethyl carbonate (DMC), and ethyl methyl carbonate (EMC) are mixed according to a mass ratio of 1:1:1 in a glove box full of argon, and A phosphazene additive with a mass percentage of 1.5% is added, and lithium hexafluorophosphate (LiPF6) is added to dissolve to a concentration of 1.0 mol / L to prepare an electrolyte.

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 a high-voltage lithium battery electrolyte. The high-voltage lithium battery electrolyte comprises a non-aqueous organic solvent, a lithium salt, an additive and a negative electrode film forming agent, wherein the negative electrode film forming agent is arbitrary one of or a combination of several kind of vinylene carbonate, vinylethylene carbonate, 1,3-propane sultone or fluoroethylene carbonate. The high-voltage lithium battery electrolyte has an effect of protecting an electrode, the compatibility of the electrolyte and a high-voltage battery material is improved, and the cycle performance of a battery is greatly improved; and meanwhile, the promotion and the application of a high-energy-density lithium ion battery are also convenient, and the high-voltage lithium battery electrolyte has important significance to development of a power battery with high safety, high energy density and long cycle lifetime.

Description

[0001] 【Technical field】 [0002] The invention relates to the technical field of electric vehicle batteries, in particular to a high-voltage lithium battery electrolyte. [0003] 【Background technique】 [0004] At this stage, lithium batteries, as the power source of electric vehicles, have also become a hot issue of concern. The development of electric vehicle industrialization has put forward higher requirements for the safety, energy density and cycle life of power batteries. Therefore, a lithium battery with high safety, high energy density and long cycle life is currently needed to meet the development needs of electric vehicles. In order to obtain high energy density, in addition to increasing the specific capacity of the battery material, the voltage of the battery cathode material can also be increased. At present, several main high-voltage cathode materials include LiCoPO4 (4.8V), LiNi0.5Mn1.5O4 (4.7V), three Element material LiNi1-xyCoxMnyO (0≤x, y≤1, x+y≤1) and ...

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): H01M10/0567H01M10/0525
CPCH01M10/0525H01M10/0567Y02E60/10
Inventor 王振峰王海涛饶睦敏
Owner OPTIMUM BATTERY CO LTD
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