Preparation method of organic electrolyte capable of improving heat stability of lithium-ion battery

A lithium-ion battery and organic electrolyte technology, which is applied in the field of organic electrolyte preparation, can solve the problems of flammability and explosion of lithium-ion battery electrolyte, and achieve the benefits of storage and service life, increased stability, and improved safety performance Effect

Inactive Publication Date: 2016-01-27
SHANDONG HONGZHENG BATTERY MATERIAL TECH
View PDF3 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the lithium-ion battery electrolyte is flammable and explosive when heated, and to provide a method for preparing an organic electrolyte that can improve the thermal stability of the lithium-ion 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
  • Preparation method of organic electrolyte capable of improving heat stability of lithium-ion battery
  • Preparation method of organic electrolyte capable of improving heat stability of lithium-ion battery
  • Preparation method of organic electrolyte capable of improving heat stability of lithium-ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A preparation method of an organic electrolyte capable of improving thermal stability of lithium-ion batteries, comprising the following steps:

[0026] 1) Remove impurities and purify EC, BC and DME organic solvents at room temperature and mix them in an equal mass ratio to obtain a mixed solvent.

[0027] 2) Stir the mixed solvent continuously and add lithium salt LiPF6 to obtain an electrolyte solution without additives; the molar concentration range of lithium salt in the electrolyte solution is 0.8mol / L.

[0028] 3) the flame retardant additive

[0029]

[0030] Adding it into the above-mentioned electrolyte solution without additives can obtain a lithium-ion battery electrolyte solution with better thermal stability, wherein the mass of the flame retardant additive is 0.5% of the mass of the solvent.

Embodiment 2

[0032] A preparation method of an organic electrolyte capable of improving thermal stability of lithium-ion batteries, comprising the following steps:

[0033] 1) Remove impurities and purify EC, MPC and EMC organic solvents at room temperature and mix them in equal mass ratios to obtain a mixed solvent.

[0034] 2) Stir the mixed solvent continuously and add lithium salt LiPF 6 , to obtain an additive-free electrolyte; the molar concentration range of the lithium salt in the electrolyte is 1mol / L.

[0035] 3) the flame retardant additive

[0036]

[0037] Adding it to the above-mentioned electrolyte solution without additives can obtain a lithium-ion battery electrolyte solution with better thermal stability, wherein the mass of the flame retardant additive is 1% of the mass of the solvent. Further, other functional additives vinylene carbonate (VC) and biphenyl (BP) are added to the electrolyte to obtain a lithium-ion battery electrolyte with better thermal stability. ...

Embodiment 3

[0039] A preparation method of an organic electrolyte capable of improving thermal stability of lithium-ion batteries, comprising the following steps:

[0040] 1) Remove impurities and purify EC, PC and DEC organic solvents at room temperature and mix them in equal mass ratios to obtain a mixed solvent.

[0041] 2) Stir the mixed solvent continuously and add lithium salt LiBF4 to obtain an electrolyte solution without additives; the molar concentration range of lithium salt in the electrolyte solution is 1mol / L. ,

[0042] 3) the flame retardant additive

[0043]

[0044] Adding it into the above-mentioned electrolyte solution without additives can obtain a lithium-ion battery electrolyte solution with better thermal stability, wherein the mass of the flame retardant additive is 0.5% of the mass of the solvent. Then add other functional additives 1,3-propane sultone (PS) and fluoroethylene carbonate (FEC) into the above electrolyte to obtain a lithium-ion battery electrol...

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 preparation method of an organic electrolyte capable of improving heat stability of a lithium-ion battery. The method comprises the following steps: (1) mixing two or more organic solvents at a room temperature at equal mass ratio after removing impurities, so as to obtain a mixed solvent; (2) lastingly stirring the mixed solvent and adding various lithium salts with different contents to obtain a series of electrolytes without an additive; and (3) adding a flame-retardant additive and other functional additives to the electrolytes without the additive, so as to obtain the lithium-ion battery electrolyte with relatively good heat stability. According to the preparation method, the heat stability of the electrolyte can be improved; the safety performance and the cycle performance of the electrolyte at a high temperature can be improved; prolonging of the cycle lifetime and the storage lifetime of the lithium-ion battery is facilitated; and the method is simple in technique, low in cost, suitable for industrial production, and relatively wide in application prospect.

Description

Technical field: [0001] The invention relates to a method for preparing an organic electrolytic solution capable of improving the thermal stability of a lithium-ion battery, and belongs to the technical field of battery materials. Background technique: [0002] With the increasingly serious energy and environmental problems, people's awareness of environmental protection is increasing, and the requirements for energy storage equipment are becoming more and more stringent. Lithium-ion batteries are used in mobile phones, Portable electronic devices such as notebook computers are widely used in the market. The current popular lithium-ion battery electrolyte system uses a mixed solution of high dielectric constant, high-viscosity cyclic carbonate and low dielectric constant, low-viscosity chain carbonate as the solvent, lithium hexafluorophosphate as the lithium salt, and adding Some other functional additives enable the comprehensive performance index of the electrolyte to me...

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): H01M10/0567H01M10/058
CPCH01M10/0567H01M10/058Y02E60/10Y02P70/50
Inventor 董苗苗谷秀娟许日勤王群峰梁振洋
Owner SHANDONG HONGZHENG BATTERY MATERIAL 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