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

Aluminum oxide modified polymer electrolyte thin film and preparation method thereof

An electrolyte film and polymer technology, applied in circuits, electrical components, secondary batteries, etc., can solve the problems of long process flow, complicated operation, easy agglomeration, etc., and achieve the effect of simplifying process, simple synthesis process, and preventing agglomeration

Inactive Publication Date: 2011-07-27
CENT SOUTH UNIV
View PDF7 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the plasticization / extraction method can improve the microporous structure of the polymer membrane, and the ionic conductivity of the electrolyte can also meet the requirements of battery applications, but this method has problems such as long process flow, complicated operation, and high cost.
The study found that adding inorganic oxide nanoparticles to the polymer electrolyte can not only improve the mechanical properties, but also increase the ionic conductivity. However, due to the strong surface effect of the nanoparticles, they tend to agglomerate easily.

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
  • Aluminum oxide modified polymer electrolyte thin film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Vinylidene fluoride and hexafluoropropylene copolymer PVDF-HFP (produced by Atochem, KYNAR2801, the same below) are mixed with aluminum isobutoxide by ball milling, and then the pore-forming agent polyvinylpyrrolidone (PVP) is added, wherein PVDF-HFP, The mass ratio of aluminum isobutoxide and PVP is 100:3:20; the solvent dimethylformamide (DMAC) is added and mixed, the mass ratio of PVDF-HFP and DMAC is 1:8, and DMAC is stirred at 10°C for 5h to obtain Uniform gel, let it stand, vacuumize to remove the air bubbles in the gel, apply the gel evenly on the aluminum foil, volatilize the solvent at 80°C to form a film, and obtain nano-alumina (containing part of aluminum oxyhydroxide) generated in situ ) Modified PVDF-HFP / PVP polymer electrolyte membrane.

[0022] The resulting PVDF-HFP / PVP / Al 2 o 3 The polymer electrolyte film was treated with 1mol / L LiPF 6 After the EC-DMC-EMC solution was soaked, activated and plasticized, its ion conductivity was tested by AC impedan...

Embodiment 2

[0024] Mix vinylidene fluoride and hexafluoropropylene copolymer PVDF-HFP with aluminum isobutoxide by ball milling, then add pore-forming agent polyvinylpyrrolidone (PVP), wherein the mass ratio of PVDF-HFP, aluminum isobutoxide, and PVP is 100 : 10:10; add solvent dimethylformamide (DMAC) and mix, the mass ratio of PVDF-HFP and DMAC is 1:9, DMAC and DMAC are stirred at 30°C for 3h to obtain a uniform gel, stand still, and vacuumize to remove the gel The air bubbles in the glue, the gel is evenly coated on the aluminum foil, and the solvent is volatilized at 50°C to form a film, and the PVDF-HFP / PVP polymer modified by nano-alumina (containing part of aluminum oxyhydroxide) generated in situ is obtained. Electrolyte film.

[0025] The resulting PVDF-HFP / PVP / Al 2 o 3 The polymer electrolyte film was treated with 1mol / L LiPF 6 After the EC-DMC-EMC solution was soaked, activated and plasticized, the ionic conductivity was tested by AC impedance method to be 2.6mS / cm. Cyclic ...

Embodiment 3

[0027] Mix vinylidene fluoride and hexafluoropropylene copolymer PVDF-HFP with aluminum isobutoxide by ball milling, then add pore-forming agent polyvinylpyrrolidone (PVP), wherein the mass ratio of PVDF-HFP, aluminum isobutoxide, and PVP is 100 : 20:5; add solvent dimethylformamide (DMAC) and mix, the mass ratio of PVDF-HFP and DMAC is 1:7, DMAC and DMAC are stirred at 40°C for 1 hour to obtain a uniform gel, let it stand, and vacuumize to remove the gel. The air bubbles in the glue, the gel is evenly coated on the aluminum foil, and the solvent is volatilized at 30°C to form a film, and the PVDF-HFP / PVP polymer modified by nano-alumina (containing part of aluminum oxyhydroxide) generated in situ is obtained. Electrolyte film.

[0028] The resulting PVDF-HFP / PVP / Al 2 o 3 The polymer electrolyte film was treated with 1mol / L LiPF 6 After the EC-DMC-EMC solution was soaked, activated and plasticized, its ion conductivity was tested by AC impedance method to be 3.1mS / cm. Cycl...

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
Ionic conductivityaaaaaaaaaa
Electrochemical stability windowaaaaaaaaaa
Ionic conductivityaaaaaaaaaa
Login to View More

Abstract

The invention provides an aluminum oxide modified polymer electrolyte thin film and a preparation method thereof. The preparation method comprises: mixing polyvinylidene fluoride (PVDF) and hexafluoropropylene (HFP) polymer with aluminum-iso-butoxide, polyvinyl pyrrolidone (PVP) and dimethylacetamide (DMAC), stirring to obtain uniform gel, standing, vacuumizing to remove air bubbles from the gel, uniformly coating the gel on a substrate, controlling temperature to volatilize solvent to obtain a film, namely the nano aluminum oxide modified PVDF-HFP / PVP polymer electrolyte thin film generated in situ. After being soaked in lithium salt solution ofcarbonate(EC)-dimethyl carbonate (DMC)-ethylmethyl carbonate (EMC) to be activated and plasticized, the polymer electrolyte thin film demonstrates high electrochemical performance. The polymer electrolyte thin film prepared by the invention has high mechanical strength, high flexibility, high ionic conductivity and high electrochemical performance and is easy for industrial production.

Description

technical field [0001] The invention belongs to the field of lithium ion battery materials, and in particular relates to a polymer electrolyte film and a preparation method. Background technique [0002] With the increasingly prominent problems of environmental pollution, energy crisis and resource shortage, countries all over the world are paying more and more attention to the development of high-efficiency, clean, renewable energy and electric vehicles and other related technologies. [0003] Lithium-ion batteries stand out among many secondary batteries due to their high energy density and excellent electrochemical performance, and have developed rapidly in recent years. Among them, the polymer lithium-ion battery has the advantages of high specific energy, safety, flexible shape, can inhibit the growth of dendrites, buffer the electrode volume change during charging and discharging, and eliminate the battery safety problems related to liquid electrolytes. An important d...

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): C08J9/28C08J9/26C08J5/18C08L27/16C08L27/20C08K3/22H01M10/0565
CPCY02E60/12Y02E60/10
Inventor 郭华军李新海王志兴黄思林杨波彭文杰胡启阳张云河
Owner CENT SOUTH UNIV
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