A kind of electrolyte of lithium ion battery and lithium ion battery

A lithium-ion battery and electrolyte technology, applied in the field of electrochemistry, to achieve the effect of improving cycle life, high safety, and suppressing swelling

Active Publication Date: 2017-02-22
ZHANGJIAGANG GUOTAI HUARONG NEW CHEM MATERIALS CO LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, there is currently no lithium-ion full battery that can take into account the high-voltage cycle and safety performance above 4.85V.

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The organic solvent is ethylene carbonate, 3-fluorophenyl methyl sulfone, and ethyl methyl carbonate (the mass ratio of the three is 30:30:40); the lithium salt is LiPF 6 , and the concentration of lithium salt is 1mol / L, the film-forming additives are vinylene carbonate and 1,3-propane sultone, accounting for 1% of the total mass of the electrolyte, and the anti-overcharge additive is cyclohexylbenzene, accounting for 1% of the total electrolyte. 0.1% of the total mass of the electrolyte, and the positive electrode protection additive is N,N-dicyclohexylcarbodiimide, accounting for 0.2% of the total mass of the electrolyte.

Embodiment 2

[0053] The organic solvent is ethylene carbonate, 3-fluorophenyl methyl sulfone, dimethyl sulfoxide, and ethyl methyl carbonate (the mass ratio of the four is 30:20:10:40); the lithium salt is LiPF 6 , and the concentration of lithium salt is 1mol / L, the film-forming additives are vinylene carbonate and 1,3-propane sultone, accounting for 1% of the total mass of the electrolyte, and the anti-overcharge additive is cyclohexylbenzene, accounting for 1% of the total electrolyte. 0.1% of the total mass of the electrolyte, and the positive electrode protection additive is N,N-dicyclohexylcarbodiimide, accounting for 0.2% of the total mass of the electrolyte.

Embodiment 3

[0055] The organic solvent is ethylene carbonate, 3-fluorophenyl methyl sulfone, tetramethyl sulfoxide, and ethyl methyl carbonate (the mass ratio of the four is 30:20:10:40); the lithium salt is LiPF 6 , and the concentration of lithium salt is 1mol / L, the film-forming additives are vinylene carbonate and 1,3-propane sultone, accounting for 1% of the total electrolyte mass respectively, and the anti-overcharge additive is biphenyl, which accounts for 1% of the total electrolyte mass. 0.1% of the total mass of the electrolyte, and the positive electrode protection additive is N,N-dicyclohexylcarbodiimide, accounting for 0.2% of the total mass of the 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 lithium-ion battery electrolyte and a lithium-ion battery. The lithium-ion battery electrolyte includes lithium salt, an organic solvent and additives, wherein the organic solvent is a mixed solvent of sulfones and / or sulfoxides and other organic solvents; the mass ratio of sulfones and / or sulfoxides to other organic solvents ranges from 0.1 to 1:1; the additives include a film-forming additive, an overcharge protection additive and an anode protection additive. The lithium-ion battery electrolyte provided by the invention can greatly prolong the cycle life of the lithium-ion battery at a high voltage of over 4.85 V and can suppress battery bulging. The lithium-ion battery using the lithium-ion battery electrolyte provided by the invention does not explode or fire when being stabbed in a fully-charged state and is highly safe.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to an electrolyte for a lithium ion battery with a working voltage above 4.85V and a lithium ion battery. Background technique [0002] In recent years, lithium-ion batteries have gradually replaced traditional batteries such as lead-acid, nickel-cadmium, and nickel-metal hydride due to their high energy density, long cycle life, and environmental friendliness. However, with the development of portable electronic products towards miniaturization and multi-function, the requirements for the energy density of lithium-ion batteries are getting higher and higher, and increasing the operating voltage of lithium-ion batteries is one of the most effective ways to improve its energy density. At present, the commonly used carbonate solvents have a narrow electrochemical window and are easy to decompose at high voltages. At the same time, the reaction between the positive...

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 Patents(China)
IPC IPC(8): H01M10/0569H01M10/0525
CPCH01M10/0525H01M10/0567H01M10/0569H01M2300/0037Y02E60/10
Inventor 陈黎甘朝伦袁翔云舒亚飞方剑慧赵世勇
Owner ZHANGJIAGANG GUOTAI HUARONG NEW CHEM MATERIALS 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