Unlock instant, AI-driven research and patent intelligence for your innovation.

Lithium ion battery gel polymer electrolyte doped with nanometer particle and preparation method thereof

A gel polymer, lithium-ion battery technology, used in secondary batteries, circuits, electrical components, etc., can solve the problems of an unsatisfactory electrochemical stability window, a need for further improvement in mechanical strength, and a lack of liquid electrolytes. Excellent liquid absorption and liquid holding capacity, wide temperature range, high production efficiency

Active Publication Date: 2010-09-01
SOUTH CHINA NORMAL UNIVERSITY
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polymer electrolytes still have the following problems: (1) the conductivity at room temperature is low, which has not reached the level of liquid electrolytes; (2) the mechanical strength needs to be further improved
The Chinese invention patent with the application number 200610043125.8 discloses "a method for preparing nano-silica / polymethyl methacrylate gel polymer electrolyte by one-step polymerization initiation", but the highest ion conductivity is only 3.44×10 -4 S cm -1 , the electrochemical stability window is still not ideal, the highest is only 4.2V (vs.Li / Li + ), the applicable temperature range is also narrow

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
  • Lithium ion battery gel polymer electrolyte doped with nanometer particle and preparation method thereof
  • Lithium ion battery gel polymer electrolyte doped with nanometer particle and preparation method thereof
  • Lithium ion battery gel polymer electrolyte doped with nanometer particle and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) The monomers methyl methacrylate (MMA), acrylonitrile (AN) and vinyl acetate (VAc) used in the polymerization are all analytically pure, and the polymerization inhibitor in the monomer is removed by distillation before polymerization. (other embodiments all have this step before polymerization)

[0037] in N 2 Under the protection of the atmosphere, 1.5 parts by mass of emulsifier sodium lauryl sulfate was added to 65 parts by mass of deionized water for dissolution, and then 33.3 parts by mass of monomers MMA, AN and VAc were added (The mass ratio of MMA, AN and VAc is 2:4:2, stir evenly, add 0.2 parts by mass of initiator sodium persulfate at 55°C with a constant pressure funnel to react (add in two times), The stirring speed is controlled at 1000r / min; the white emulsion is obtained after 6 hours of reaction, and the white emulsion is poured into 1 times the above reaction volume, Al 2 (SO 4 )3 3 parts by mass of Al 2 (SO 4 ) 3 Stir in the solution to break...

Embodiment 2

[0041] (1) in N 2 Under the protection of the atmosphere, 3 parts by mass of emulsifier potassium lauryl sulfate was added to 61.6 parts by mass of deionized water for dissolution, and then 35 parts by mass of monomers MMA, AN and VAc were added (The mass ratio of MMA, AN and VAc is 2:8:1), stir evenly, and add 0.4 parts by mass of initiator potassium persulfate at 60°C with a constant pressure funnel to react (add in two times) , the stirring speed is controlled at 800r / min; after 7 hours of reaction, a white emulsion is obtained, and the white emulsion is poured into 1 times of the above reaction volume, Al 2 (SO 4 ) 3 The mass part is 3.5 parts of Al 2 (SO 4 ) 3 Stir in the solution to break the emulsion, and then wash with deionized water at a temperature of 60°C for 3 times, and then with absolute ethanol for 3 times to remove any incompletely reacted monomer or emulsifier. The obtained white polymer P(MMA-AN-VAc) powder was dried in a vacuum oven at 60° C. for 28 h...

Embodiment 3

[0045] (1) in N 2 Under atmosphere protection, the emulsifier lauryl ammonium sulfate that is 1 part by mass part is added to the deionized water dissolving of 68.65 mass parts, then adds the monomer MMA, AN and VAc of 30 mass parts (wherein MMA, AN and The mass ratio of VAc is 4:8:1), stir evenly, and add 0.35 mass parts of initiator ammonium persulfate at 60°C with a constant pressure funnel to react (adding in two times), and the stirring speed is controlled at 800r / min; After reacting for 6.5 hours, a white emulsion was obtained, and the white emulsion was poured into 1.5 times of the above-mentioned reaction volume, Al 2 (SO 4 ) 3 4 parts by mass of the solution was stirred to break the emulsion, and then washed 4 times with deionized water at a temperature of 60° C., and then washed 4 times with absolute ethanol to remove any incompletely reacted monomer or emulsifier. The obtained white polymer P(MMA-AN-VAc) powder was dried in a vacuum oven at 65° C. for 30 hours. ...

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

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a lithium ion battery gel polymer electrolyte mixed with nanometer grains and a preparation method thereof, namely, mixing the nanometer grains in a poly (acrylonitrile-methyl methacrylate-vinyl acetate); after the nanometer grains are completely dissolved, the obtained ropy liquor is coated on a glass plate and the thickness of a membrane is fixed; then the glass plate isdipped into a de-ionized water slot, thus obtaining a white membrane; the membrane is arranged in floating water and washed for 1 to 5 hours; then the membrane is dipped into the de-ionized water for1 to 3 hours; finally the membrane is arranged in a vacuum drying box and dried for 20 to 30 hours, thus obtaining the lithium ion battery gel polymer membrane mixed with nanometer grains; then the lithium ion battery gel polymer membrane mixed with nanometer grains is dipped into an electrolyte for 20 to 40 minutes, thus obtaining the lithium ion battery gel polymer electrolyte mixed with nanometer grains. The manufacture technique is simple; the time is short; the production efficiency is high; the decomposing voltage, the ionic conductivity and the mechanical intensity are higher.

Description

technical field [0001] The invention relates to the field of lithium ion batteries, in particular to a lithium ion battery gel polymer electrolyte doped with nanoparticles and a preparation method thereof. Background technique [0002] Lithium-ion batteries have the advantages of high energy density, high working voltage, long cycle life, low self-discharge, and no memory effect. They are more widely used than other rechargeable and dischargeable batteries. However, liquid lithium-ion batteries have an Achilles' heel—safety issues caused by the leakage of liquid organic solvent electrolytes. Gel polymer electrolyte (GPE) uses a polymer matrix to directly convert liquid organic solvents into gels, which fundamentally solves the safety problem; at the same time, it can be ultra-thin and arbitrary in shape, ensuring The full contact inside the battery greatly improves the flexibility of the battery design, and the polymer battery has better cycle life, film forming, thermal st...

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): C08J5/18C08K3/34C08K3/36H01M10/38C08F220/44C08K3/22C08K3/24C08L33/20H01M10/40
CPCY02E60/122Y02E60/10Y02P70/50
Inventor 廖友好饶睦敏李伟善
Owner SOUTH CHINA NORMAL UNIVERSITY