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Organic-inorganic composite electrolyte, preparation method thereof, and application in solid lithium ion secondary battery

An inorganic composite and electrolyte technology, applied in the field of communication, can solve the problems of lack of ion-conducting ability, large interface impedance, and low conductivity, and achieve the effect of improving room temperature conductivity, reducing interface impedance, and easy winding

Active Publication Date: 2019-02-01
SUZHOU QINGTAO NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

PEO has high crystallinity and low electrical conductivity at room temperature; PVDF and PMMA do not have the ability to conduct ions, and at room temperature, the combination of rigid materials and pole pieces is relatively loose, the pole pieces are easy to slide, and the interface impedance is large.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] An organic-inorganic composite electrolyte, the composite electrolyte is composed of medium temperature viscoelastic transition polymer, lithium salt and fast ion conductor ceramic powder, the mass parts of the above components are: medium temperature viscoelastic transition polymer: 60 parts; lithium salt bistrifluoromethanesulfonylimide lithium (LiTFSI): 20 parts; fast ion conductor ceramic powder lithium lanthanum zirconium oxide (LLZO): 50 parts.

[0024] The medium-temperature viscoelastic transformation polymer includes a hard monomer, an ethoxy-containing soft monomer, an initiator and an organic solvent, and the mass parts of the above components are: 20 parts of hard monomer methyl methacrylate; 20 parts of ethoxy-containing soft monomer methoxy polyethylene glycol acrylate; 0.2 parts of dibenzoyl peroxide initiator; 60 parts of organic solvent butyl acetate.

[0025] A method for preparing an organic-inorganic composite electrolyte, comprising the following pr...

Embodiment 2

[0034] An organic-inorganic composite electrolyte, the composite electrolyte is composed of medium temperature viscoelastic transition polymer, lithium salt and fast ion conductor ceramic powder, the mass parts of the above components are: medium temperature viscoelastic transition polymer: 40 parts; lithium salt lithium trifluoromethanesulfonate (LiCF 3 SO 3 ): 20 parts; fast ion conductor ceramic powder lithium lanthanum titanium oxide (LLTO): 80 parts.

[0035] The medium-temperature viscoelastic transformation polymer includes a hard monomer, an ethoxy-containing soft monomer, an initiator and an organic solvent, and the mass parts of the above-mentioned components are respectively: 30 parts of hard monomer acrylonitrile; 15 parts of ethoxy ethoxy ethyl acrylate based soft monomer; 0.2 parts of initiator azobisisobutyronitrile; 50 parts of organic solvent toluene.

[0036] A method for preparing an organic-inorganic composite electrolyte, comprising the following prepara...

Embodiment 3

[0045] An organic-inorganic composite electrolyte, the composite electrolyte is composed of medium temperature viscoelastic transition polymer, lithium salt and fast ion conductor ceramic powder, the mass parts of the above components are: medium temperature viscoelastic transition polymer: 60 Parts; Lithium salt bis(trifluoromethylsulfonyl)imide lithium (LiN(CF 3 SO 2 ) 2 ): 20 parts; fast ion conductor ceramic powder lithium lanthanum titanium oxide (LLTO): 40 parts.

[0046] The medium-temperature viscoelastic transformation polymer includes hard monomers, ethoxy-containing soft monomers, initiators and organic solvents, and the mass parts of the above components are respectively: 10 parts of hard monomer methyl methacrylate, 10 parts of styrene; 20 parts of ethoxy-containing soft monomer ethoxyethoxyethyl acrylate; 0.2 parts of initiator lauryl peroxide; 60 parts of organic solvent methyl ethyl ketone.

[0047] A method for preparing an organic-inorganic composite elect...

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PUM

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Abstract

An organic-inorganic composite electrolyte is disclosed and is composed of a medium-temperature viscoelastic-transformable polymer, lithium salt, and a fast ion conductor ceramic powder, wherein the medium-temperature viscoelastic-transformable polymer includes a hard monomer, a soft monomer containing ethoxyl group, an initiator, and an organic solvent. The organic and inorganic phases of the composite electrolyte film both have ion-conductivity, thus increasing room-temperature conductivity. The organic-inorganic composite electrolyte film has no viscosity at room temperature, so that the film is easy to reel and be composited with an electrode plate in a multilayer manner. The organic-inorganic composite electrolyte is suitable for industrial production.

Description

technical field [0001] The invention relates to the communication field, relates to an organic-inorganic composite electrolyte, and also relates to a preparation method of the organic-inorganic composite electrolyte, in particular to the application of an organic-inorganic composite electrolyte in a solid-state lithium ion secondary battery. Background technique [0002] Solid-state batteries have attracted much attention due to their advantages of high energy density, high safety and flexibility. The use of organic-inorganic composite solid electrolytes is an important method for preparing lithium-ion solid secondary batteries. At present, the organic materials commonly used in organic-inorganic composite solid electrolytes are mainly polyethylene oxide (PEO), polyvinylidene fluoride (PVDF), polymethyl methacrylate (PMMA), etc., but all of the above organic materials have certain defects. . PEO has high crystallinity and low electrical conductivity at room temperature; PV...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0562H01M10/0565H01M10/0525
CPCH01M10/0525H01M10/0562H01M2300/0065H01M2300/0088Y02E60/10
Inventor 李峥冯玉川何泓材车荣升杨帆南策文
Owner SUZHOU QINGTAO NEW ENERGY TECH CO LTD
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