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

Non-aqueous electrolyte solution and lithium ion battery using same

A non-aqueous electrolyte, electrolyte technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of low temperature performance and cycle performance, low temperature resistance, propylene carbonate intercalation damage and other problems, to achieve cycle performance Good, good low temperature performance

Inactive Publication Date: 2012-01-25
BYD CO LTD
View PDF3 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the technical problems of the non-aqueous electrolyte provided in the prior art, such as large low-temperature impedance, unstable SEI film, and graphite intercalation damage by propylene carbonate, which lead to poor low-temperature performance and cycle performance of the battery. A non-aqueous electrolytic solution with good cycle performance and good low-temperature performance and a battery comprising the non-aqueous electrolytic solution

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
  • Non-aqueous electrolyte solution and lithium ion battery using same
  • Non-aqueous electrolyte solution and lithium ion battery using same
  • Non-aqueous electrolyte solution and lithium ion battery using same

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0021] The present invention also provides a preparation method of non-aqueous electrolyte

[0022] The method comprises mixing an organic solvent and an additive, and then adding a lithium salt to obtain a non-aqueous electrolyte, and the additive is one or more of hydrothiophenes having the following structure:

[0023]

[0024] A and B are independently selected from one of amino, alkyl, halogen, and ester groups. In the process of configuring the non-aqueous electrolyte, based on the total weight of the non-aqueous electrolyte, lithium salts, organic solvents, and additives The weight ratio of the lithium salt, the organic solvent and the additive is 3-20:70-90:0.5-10; preferably, the weight ratio of the lithium salt, the organic solvent and the additive is 5-15:70-85:0.5-5.

[0025] The detailed steps are to first mix ethyl methyl carbonate, dimethyl carbonate, diethyl carbonate, ethylene carbonate, propylene carbonate, butylene carbonate, vinyl sulfite, propylene sulf...

Embodiment 1

[0028] This example is used to illustrate the non-aqueous electrolytic solution provided by the present invention, its preparation method and the lithium ion battery using the non-aqueous electrolytic solution.

[0029] 1) Preparation of non-aqueous electrolyte: Based on the total weight of non-aqueous electrolyte, put 30 parts of propyl carbonate (PC), 40 parts of ethyl butyrate (EB), and 30 parts of dimethyl carbonate (DMC) into Mix the high mixer for 1 hour at a speed of 50r / min to make a mixed organic solvent, then add 18 parts of lithium salt LiPF 6, and then add 0.5% of 2-aminohydrothiophene and 0.3% of 2-fluorohydrothiophene based on the total weight of the non-aqueous electrolyte, and after stirring for 2h at a stirring speed of 50r / min, the required non-aqueous electrolyte sample A1.

[0030] 2) Preparation of negative electrode: natural graphite, conductive agent acetylene black, binder PVDF (Atofina Company, 761#PVDF) in the solvent N-methyl-2-pyrrolidone in a cert...

Embodiment 2

[0034] This example is used to illustrate the non-aqueous electrolytic solution provided by the present invention, its preparation method and the lithium ion battery using the non-aqueous electrolytic solution.

[0035] 1) Preparation of non-aqueous electrolyte: Based on the total weight of non-aqueous electrolyte, put 30 parts of propyl carbonate (PC), 40 parts of ethyl butyrate (EB), and 30 parts of dimethyl carbonate (DMC) into Mix the high mixer for 1 hour at a speed of 50r / min to make a mixed organic solvent, then add 18 parts of lithium salt LiPF 6 , followed by adding 1.5 wt% 2-aminohydrothiophene and 0.9% 2-fluorohydrothiophene based on the total weight of the non-aqueous electrolyte, and stirring for 2 hours, the required non-aqueous electrolyte sample A2 was prepared.

[0036] 2) Preparation of negative electrode: natural graphite, conductive agent acetylene black, binder PVDF (Atofina Company, 761#PVDF) in the solvent N-methyl-2-pyrrolidone in a certain ratio of 100...

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 provides non-aqueous electrolyte solution and a lithium ion battery using the same. The non-aqueous electrolyte solution contains lithium salt, organic solvent and additives. The additives are one or several kinds of hydrogen thiophene with the following structure as shown in the accompanying drawing, wherein A and B are respectively and independently selected from one of amino group, alkyl group, halogen and ester group. The invention additionally provides the lithium ion battery, which comprises a cell, non-aqueous electrolyte solution and a shell, wherein the cell comprises an anode, a cathode and an isolating membrane which is arranged between the anode and the cathode, the cell and the non-aqueous electrolyte solution are contained in the shell and the electrolyte solution is the non-aqueous electrolyte solution provided by the invention.

Description

technical field [0001] The invention belongs to the field of lithium ion batteries, and relates to a nonaqueous electrolytic solution for lithium ion batteries and a lithium ion battery using the nonaqueous electrolytic solution. Background technique [0002] After entering the 21st century, with the increasing awareness of energy crisis and environmental protection, clean energy has become more and more popular and valued by people. Lithium-ion batteries have won people's favor with their unique advantages. Lithium-ion batteries have the characteristics of high working voltage, no memory, low self-discharge, and high energy density. They will gradually replace nickel-hydrogen and nickel-cadmium batteries and become the preferred energy source for various electronic products. In recent years, the launch of electric vehicles and other products has led to a research boom in lithium-ion batteries, and the country has also continuously introduced some new policies to promote the...

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
CPCY02E60/122Y02E60/10
Inventor 王圣陈辉
Owner BYD 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