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Composite material interlayer for battery as well as preparation method and application of composite material interlayer

A composite material and interlayer technology, applied in the field of composite materials, can solve the problems of lithium dendrites with fast migration of lithium ions, uneven temperature distribution of lithium-sulfur batteries, local temperature, persulfide shuttle, etc., to improve mechanical properties and improve electrochemical performance. Reaction rate, the effect of promoting electron transfer

Active Publication Date: 2021-07-23
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006]Aiming at the defects of the prior art, the purpose of the present invention is to provide a lithium-sulfur battery composite interlayer with heat conduction and catalytic functions, aiming to solve the internal problems of lithium-sulfur batteries. Uneven temperature distribution, resulting in excessive local temperature, serious persulfide shuttle, fast lithium ion migration, rapid growth of lithium dendrites, etc.

Method used

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  • Composite material interlayer for battery as well as preparation method and application of composite material interlayer
  • Composite material interlayer for battery as well as preparation method and application of composite material interlayer
  • Composite material interlayer for battery as well as preparation method and application of composite material interlayer

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preparation example Construction

[0046] A kind of preparation method of composite material interlayer for battery provided by the invention comprises the following steps:

[0047] (1) Dissolving the catalytic material precursor in the aqueous solution of graphene oxide, stirring to obtain a uniformly dispersed graphene oxide-catalytic material precursor mixed dispersion;

[0048] (2) The graphene oxide-catalyzed material precursor mixed dispersion obtained in step (1) is prepared by the ice template method to obtain the graphene oxide / catalyzed material precursor aerogel;

[0049] (3) heat-treating the graphene oxide / catalytic material precursor aerogel obtained in step (2) under a protective atmosphere to obtain graphene / catalytic material aerogel;

[0050] (4) the organic solution of macromolecule material is perfused in the Graphene / catalyst material aerogel that step (3) obtains, makes the pore of the Graphene / catalyst material aerogel that step (3) obtains be covered by macromolecule material The organi...

Embodiment 1

[0067] A composite material interlayer with heat conduction and catalytic functions, the composite material interlayer is a polyethylene oxide / graphene / vanadium pentoxide composite interlayer with a thickness of 5 μm; wherein the graphene has a honeycomb airgel network structure, and vanadium pentoxide is dispersed in the honeycomb airgel network structure; the polyethylene oxide is filled in the pores of the honeycomb airgel network structure; polyethylene oxide, graphene and The mass ratio of vanadium pentoxide is 90:2:8; the relative molecular mass of polyethylene oxide is 100,000.

[0068] The preparation method of the composite interlayer with heat conduction and catalytic functions comprises the following steps:

[0069](1) 1g ammonium metavanadate is dissolved in 0.1L concentration and is the aqueous solution of graphene oxide of 10g / L, through 1h ultrasonic stirring, obtains the graphene oxide-ammonium metavanadate mixed dispersion liquid of uniform dispersion;

[007...

Embodiment 2

[0076] A composite interlayer with heat conduction and catalytic functions, the composite interlayer is a polyethylene oxide / graphene / molybdenum disulfide composite interlayer with a thickness of 5 μm, wherein the graphene has a honeycomb airgel network structure, and Molybdenum disulfide is dispersed in the honeycomb airgel network structure; polyethylene oxide is filled in the pores of the honeycomb airgel network structure; the mass ratio of polyethylene oxide, graphene and molybdenum disulfide It is 90:5:5; the relative molecular mass of polyethylene oxide is 100,000.

[0077] The preparation method of the composite interlayer with heat conduction and catalytic functions comprises the following steps:

[0078] (1) 1g ammonium tetrathiomolybdate is dissolved in 0.1L concentration and is the aqueous solution of the graphene oxide of 10g / L, through 1h ultrasonic stirring, obtains the graphene oxide-ammonium tetrathiomolybdate mixed dispersion liquid uniformly dispersed;

[0...

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Abstract

The invention belongs to the technical field of composite materials and more particularly relates to a composite material interlayer for a battery as well as a preparation method and application of the composite material interlayer. The composite material interlayer is an interlayer with heat conduction and catalysis functions and comprises a polymer material capable of transmitting lithium ions, graphene and a catalysis material, wherein the graphene with high heat conduction exists in a continuous network structure, a good heat conduction path is constructed, the heat conduction capability of the composite material is improved, and heat in the battery can be uniformly dissipated; meanwhile, the polymer material is beneficial to conduction of lithium ions and can block shuttling of polysulfide; and the catalytic material can promote conversion of polysulfide in the battery and improve the electrochemical performance of the battery. The composite material interlayer provided by the invention is mainly applied to a lithium-sulfur battery, and uniform dissipation of heat in the battery and improvement of the battery performance can be realized at the same time.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and more specifically relates to a composite material interlayer for batteries, its preparation method and application. Background technique [0002] Energy issues have always been a key issue related to national and social development. my country has a large population and low per capita energy resources. With the continuous expansion of economic scale, resource constraints are becoming increasingly tight. However, my country's current energy development methods are extensive and fossil energy reserves are limited, resulting in serious environmental pollution and energy crises. New energy has the advantages of being clean, environmentally friendly and renewable, and can significantly alleviate the current environmental and energy problems. However, due to the limitation of natural conditions, some new energy cannot provide continuous and stable energy. Therefore, it is necessary to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/403H01M50/414H01M50/431H01M50/449H01M50/489H01M50/497H01M10/653H01M10/654H01M10/052
CPCH01M10/653H01M10/654H01M10/052Y02E60/10
Inventor 周兴平常晨叶昀昇裴会杰石清璇解孝林
Owner HUAZHONG UNIV OF SCI & TECH
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