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Preparation method and application of organic and inorganic hybrid thin film

An inorganic and organic technology, applied in the field of preparation and application of organic-inorganic hybrid films, to achieve the effects of improving stability, easy mass production, and good toughness

Active Publication Date: 2019-06-14
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no report on the preparation of organic-inorganic hybrid thin films by this method and its application in metal lithium batteries

Method used

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  • Preparation method and application of organic and inorganic hybrid thin film
  • Preparation method and application of organic and inorganic hybrid thin film
  • Preparation method and application of organic and inorganic hybrid thin film

Examples

Experimental program
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Embodiment 1

[0031] A method for preparing an organic-inorganic hybrid film, the specific preparation steps are as follows:

[0032] Step 1: Mix 10mL of 2mg / mL ethanol solution of graphene oxide with 5mL of 30wt.% ethanol solution of ferric 4-ethylbenzenesulfonate with a mass fraction of 30wt.% and ultrasonically mix for 1h, and the dispersion power is 600w to obtain a mixed solution ;

[0033] Step 2: Heat the mixed solution obtained in Step 1 to 80°C in a polytetrafluoroethylene bottle and dry it for 1 hour to form a film;

[0034] Step 3: Place the film obtained in step 2 in pyrrole steam for 30 minutes to polymerize the pyrrole monomer, then wash it twice in ethanol solution and once in dimethyl carbonate solution to obtain an organic film with a thickness of about 10 μm. Sulfonated polypyrrole covalently modified inorganic graphene oxide membrane, that is, organic-inorganic hybrid thin film.

[0035] from figure 1 It can be seen that the synthesized organic-inorganic hybrid film pr...

Embodiment 2

[0039] A method for preparing an organic-inorganic hybrid film, the specific preparation steps are as follows:

[0040]Step 1: 5 mL of 5 mg / mL ethanol solution of graphene oxide and 5 mL of 50% ethanol solution of ferric 4-ethylbenzenesulfonate with a mass fraction of 50% were ultrasonically mixed for 1 hour, and the dispersion power was 600w to obtain a mixed solution;

[0041] Step 2: Using a glass fiber diaphragm as a filter membrane, the mixed solution in step 1 is filtered by a water pump for 10 hours under reduced pressure to form a thin film;

[0042] Step 3: Place the membrane obtained in step 2 in pyrrole steam for 1.5 hours to polymerize the pyrrole monomer, and then wash it in acetonitrile solution for 3 times to obtain inorganic graphite oxide covalently modified with organic sulfonated polypyrrole with a thickness of about 20 μm Alkene films, that is, organic-inorganic hybrid films.

[0043] Such as Figure 4 As shown, the organic-inorganic hybrid film was place...

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Abstract

The invention discloses a preparation method and application of an organic and inorganic hybrid thin film. The preparation method comprises the following steps: step 1, evenly mixing graphene oxide solution and oxidation agent solution in solvent, thereby obtaining mixed solution; step 2, processing the mixed solution obtained in the step 1 into film through suction filtration or drying the mixedsolution into film in a teflon bottle; step 3, adding the film obtained in the step 2 in pyrrole vapor to polymerize pyrrole monomers, after cleaning, obtaining an organic sulfonated polypyrrole covalently modified inorganic graphene oxide film, namely, the organic and inorganic hybrid thin film. The method is simple in technique, low-cost and environmental-friendly, and can realize large-scale production. The obtained sulfonated polypyrrole and graphene oxide hybrid thin film have excellent lithium ion conduction capability, as artificial SEI film, diaphragm modification layer, and so on, canremarkably restrain lithium metal dendritic crystal growth and polysulfide lithium shuttling, and can improve operating stability and safety of a lithium metal battery.

Description

technical field [0001] The invention relates to a preparation method and application of an organic-inorganic hybrid thin film for inhibiting the growth of lithium dendrites in lithium metal batteries and the shuttling effect of polysulfides in lithium-sulfur batteries. Background technique [0002] With the increasing demand for large-capacity energy storage batteries, high specific energy lithium metal batteries have become one of the frontier research hotspots in the field of energy storage today. The specific capacity of lithium metal is about 3860mAh / g, more than 10 times that of graphite negative electrode, and because it contains lithium itself, the positive electrode of the battery can be made of lithium-free materials, such as sulfur / carbon composite materials, etc. Battery material selection range. However, when lithium metal is used as the negative electrode, lithium ions are deposited unevenly on the surface, which induces the growth of dendrite lithium on the su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/134H01M10/052H01M10/42C01B32/194
CPCY02E60/10
Inventor 袁涛郑时有杨俊和赵雅慧张鹏程宋程威郑帅
Owner UNIV OF SHANGHAI FOR SCI & TECH
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