Organic-inorganic composite electrolyte membrane as well as preparation method and application thereof

一种电解质膜、无机复合的技术，应用在电解质蓄电池制造、非水电解质蓄电池、电路等方向，能够解决电解液消耗没有相应的减少、影响电芯外观及超厚、软包电芯涨液等问题，达到提高迁移数、加强链接、增加保液能力的效果

Active Publication Date: 2018-06-08
DONGGUAN AMPEREX TECH
View PDF6 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to meet customers' requirements for higher and higher energy density of batteries, major battery manufacturers fill the same volume with as much active material as possible by increasing the compaction density of the pole piece and reducing the thickness of the separator, which makes the battery The space left for the electrolyte inside the cell is reduced, but the consumption of the electrolyte is not reduced accordingly, which causes the problem of liquid swelling in the soft package battery; and the liquid swelling will affect the appearance of the battery cell and problems such as ultra-thickness, directly affecting Cell shipments

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

[0061] Preparation of Porous Organic-Inorganic Composite Particles

[0062] The urea-formaldehyde resin was added to an appropriate amount of deionized water, magnetically stirred to form a viscous solution, and then the porous Al 2 o 3 (porosity 80%) stirring to obtain a uniform suspoemulsion, and after the suspension is spray-dried at 160° C., porous organic-inorganic composite particles with a particle size of 500-2000 nm are obtained. In the porous organic-inorganic composite particle, the percentage content of urea-formaldehyde resin is 5wt%.

[0063] Preparation of Organic-Inorganic Composite Electrolyte Membrane

[0064] After the porous organic-inorganic composite particles were dispersed in the solvent DMF by ultrasonic oscillation for 30 minutes, an appropriate amount of polymer matrix PVDF-HFP and pore-forming agent PEG-200 (polyethylene glycol with an average molecular weight of 200) was weighed and added to the dispersed solution, wherein the mass ratio of poro...

Embodiment 2

[0068] Preparation of Porous Organic-Inorganic Composite Particles

[0069] The preparation steps are the same as in Example 1, except that the porous Al used 2 o 3 The porosity is 50%.

[0070] Preparation of Organic-Inorganic Composite Electrolyte Membrane

[0071] Preparation steps and ratio of raw materials are the same as in Example 1.

[0072] Electrolyte membrane activation and parameters

[0073] The activation steps of the electrolyte membrane are the same as in Example 1.

[0074] Its ionic conductivity was tested by AC impedance method to be 2.5mS / cm. Its electrochemical stability window was tested by linear scanning method>5.4V. The breaking strength measured by tensile machine is >12MPa, the porosity is >48% measured by mercury porosimetry, the average pore diameter of the outer layer is 500nm, and the average pore diameter of the inner layer is 50nm.

Embodiment 3

[0076] Preparation of Porous Organic-Inorganic Composite Particles

[0077] The preparation steps are the same as in Example 1, except that the porous Al used 2 o 3 The porosity is 95%.

[0078] Preparation of Organic-Inorganic Composite Electrolyte Membrane

[0079] Preparation steps and ratio of raw materials are the same as in Example 1.

[0080] Electrolyte membrane activation and parameters

[0081] The activation steps of the electrolyte membrane are the same as in Example 1.

[0082] Its ionic conductivity was tested by AC impedance method to be 4.6mS / cm. Its electrochemical stability window was tested by linear scanning method>5.6V. The breaking strength measured by tensile machine is >15MPa. The porosity measured by mercury porosimetry is more than 65%, the average pore diameter of the outer layer is 600nm, and the average pore diameter of the inner layer is 80nm.

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
porosityaaaaaaaaaa
aperture sizeaaaaaaaaaa
aperture sizeaaaaaaaaaa
Login to view more

Abstract

The application discloses an organic-inorganic composite electrolyte membrane. The electrolyte membrane is a porous polymer membrane prepared from a porous organic-inorganic composite particle, wherein the porous organic-inorganic composite particle is prepared from a porous inorganic matter and thermosetting resin. The electrolyte membrane has abundant pore structures and high porosity while maintaining the low crystallinity of a polymer; thus, the ionic conductivity of the electrolyte membrane can be greatly improved, wherein the porous inorganic particle can be also used for forming abundant ion channels inside besides being capable of improving the liquid preservation capacity of the electrolyte membrane and prolonging the cycle service of a battery core; the ionic conductivity and anelectrochemical stability window of the electrolyte membrane are further improved, and the requirement of the application to a high-voltage system can be met.

Description

[0001] This application is a divisional application of an invention patent application with the application number 201410784465.0 entitled "An organic-inorganic composite electrolyte membrane, its preparation method and application" filed on December 16, 2014. technical field [0002] The application relates to an electrolyte membrane, its preparation method and application, and belongs to the field of battery materials. Background technique [0003] 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. [0004] In recent years, with the popularity of portable electronic devices and the development of electric vehicles, lithium-ion batteries as a new generation of high-energy power sources have received great attention. The gel polymer electrolyt...

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): H01M2/16H01M50/446H01M50/491
CPCH01M10/056H01M10/0565H01M10/058Y02E60/10
Inventor 黄思林陈宏浩周世波林永寿付成华
Owner DONGGUAN AMPEREX 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