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Ceramic diaphragm for in-situ generation of composite binder, and preparation method and application of ceramic diaphragm

An in-situ generation, ceramic diaphragm technology, applied in structural parts, electrochemical generators, electrical components, etc., can solve the problems of unfavorable industrial application of diaphragms, increased cost of diaphragms, and high price of dopamine in the market

Active Publication Date: 2017-07-14
厦门益舟新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, it should be known that the market price of dopamine is expensive, which will greatly increase the cost of the diaphragm, which is very unfavorable to the industrial application of the diaphragm

Method used

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  • Ceramic diaphragm for in-situ generation of composite binder, and preparation method and application of ceramic diaphragm
  • Ceramic diaphragm for in-situ generation of composite binder, and preparation method and application of ceramic diaphragm
  • Ceramic diaphragm for in-situ generation of composite binder, and preparation method and application of ceramic diaphragm

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Example 1: Preparation of a ceramic separator with an in-situ composite binder and its application in lithium-ion batteries

[0069] Preparation of Ceramic Separators with Composite Binders:

[0070] Disperse aluminum oxide powder with a particle size of 100-200nm and a binder (styrene-butadiene rubber (SBR) and carboxymethyl cellulose (CMC) system) in a solvent, and mix thoroughly to form a ceramic slurry. Wherein, the mass ratio of each component is: aluminum oxide / SBR / CMC=95 / 3 / 2. The solvent used in present embodiment 1 is to use the water / ethanol that volume ratio is 1:1 to be solvent, and configuration pH is the 10mmol / L Tris / hydrochloric acid pH buffer solution of 8.5, and the mass ratio of liquid-solid is 90%:10%.

[0071] After the ceramic slurry is evenly mixed, catechol is dissolved in the ceramic slurry so that its concentration is 20mmol / L, and the molar ratio is: catechol / tetraethylenepentamine=4 / 1, and a quantitative amount of Tetraethylenepentamine. S...

Embodiment 2

[0081] Example 2: Preparation of a ceramic separator with an in-situ composite binder and its application in lithium-ion batteries

[0082] Preparation of Ceramic Separators with Composite Binders:

[0083] Disperse silica balls with a particle size of 200nm and a binder (gelatin and polyvinyl alcohol (PVA) system) in a solvent, and mix thoroughly to make a ceramic slurry, wherein the mass ratio of each component is: silica / gelatin / PVA=90 / 4 / 6. The solvent used in the present embodiment 2 is that water / methanol with a volume ratio of 1:1 is a solvent, and configuration pH is a 10mmol / L tris / hydrochloric acid pH buffer solution of 12, and the mass ratio of liquid to solid is 90%:10%.

[0084] After the ceramic slurry is evenly mixed, dissolve pyrogallol in the ceramic slurry so that its concentration is 200mmol / L, and the molar ratio is: pyrogallol / polyethyleneimine with a molecular weight of 600=10 / 1 , adding quantitative polyethyleneimine. Stir to fully dissolve and mix t...

Embodiment 3

[0091] Example 3: Preparation of a ceramic separator with in-situ composite binder and its application in lithium-ion batteries

[0092] Preparation of Ceramic Separators with Composite Binders:

[0093] Disperse titanium dioxide powder with a particle size of 300nm and a binder (polyacrylate terpolymer latex (LA132, LA133) system) in a solvent, and mix them thoroughly to form a ceramic slurry. The mass ratio of each component It is: titanium dioxide / LA132 / LA133=85 / 6 / 9. The solvent used in the present embodiment 3 is that water / acetone with a volume ratio of 1:1 is a solvent, and configuration pH is 10mmol / L tris / hydrochloric acid pH buffer solution, and the mass ratio of liquid to solid is 90%:10%.

[0094] After the ceramic slurry is evenly mixed, tannic acid is dissolved in the ceramic slurry so that its concentration is 2mmol / L, and the molar ratio is: tannic acid / phenylethylamine=1 / 5, and a quantitative amount of phenylethylamine is added . Stir to fully dissolve and ...

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Abstract

The invention relates to a ceramic diaphragm for in-situ generation of a composite binder. The ceramic diaphragm comprises an organic diaphragm base material, wherein the single side or two sides of the surface of the organic diaphragm base material are coated with the composite binder to form a ceramic protection layer; the composite binder is a composite monomer copolymer which is generated by adding composite monomers into ceramic paste through in-situ polymerization; and the composite monomers comprise a monomer A comprising a polyphenol functional group and a monomer B comprising an amino functional group. The invention also relates to a preparation method for the ceramic diaphragm for in-situ generation of the composite binder, and an application of the ceramic diaphragm for in-situ generation of the composite binder in a secondary battery; the secondary battery comprises a lithium ion battery; the secondary battery comprises a positive electrode and a negative electrode; and the ceramic diaphragm for in-situ generation of the composite binder is arranged between the positive electrode and the negative electrode. The prepared ceramic diaphragm for in-situ generation of the composite binder is excellent in comprehensive performance, high in innovation and practicability, and has high industrial application prospect.

Description

technical field [0001] The invention belongs to the technical field of new energy, is applied to batteries, capacitors, etc., and specifically relates to a ceramic diaphragm prepared by in-situ generation of a composite binder. More specifically, the present invention relates to directly adding composite monomers into the ceramic slurry, and after coating on one or both sides of the surface of the organic diaphragm substrate, in-situ polymerization generates a composite monomer copolymer as a binder, and The composite monomer solution enters the pores of the basement membrane and simultaneously reacts and polymerizes. The invention also relates to the application of the ceramic diaphragm prepared by the in-situ composite binder in chemical power systems such as lithium ion batteries and the battery containing the ceramic diaphragm. Background technique [0002] Lithium-ion battery is a kind of secondary battery, which is composed of positive electrode, negative electrode, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/14H01M2/16H01M10/0525H01M50/403H01M50/446H01M50/449
CPCH01M10/0525H01M50/403H01M50/449Y02E60/10
Inventor 肖冰
Owner 厦门益舟新能源科技有限公司
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