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Silicon dioxide layer coated conductive polyaniline composite material and preparation method thereof

A conductive polyaniline and silicon dioxide technology, which is applied in the manufacture of hybrid/electric double layer capacitors, secondary batteries, circuits, etc., can solve problems such as uneven force, uneven adhesion of large particles, and reduced life of energy storage equipment. , to achieve the effect of avoiding accumulation

Active Publication Date: 2020-03-03
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyaniline and silicon dioxide are one of the important electrode materials for lithium-ion batteries and supercapacitors. The uneven adhesion of such large particles is not conducive to buffering the mechanical stress generated by the composite material during the electrochemical process, but will lead to poor stress. Uniformity, so that the life of energy storage equipment is significantly reduced

Method used

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  • Silicon dioxide layer coated conductive polyaniline composite material and preparation method thereof
  • Silicon dioxide layer coated conductive polyaniline composite material and preparation method thereof
  • Silicon dioxide layer coated conductive polyaniline composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Dissolve 1 milliliter of aniline in 1mol / L hydrochloric acid solution, stir evenly, then add 100 milliliters of 1mol / L hydrochloric acid solution containing 0.4679g potassium hydrogen iodate, then add 5 milliliters of 5% sodium hypochlorite solution dropwise quickly, stand still Obtain dark green precipitate in 30 minutes, filter, pickle, dry and set aside;

[0035] (2) Measure 15 ml of tetraethyl orthosilicate solution, pour it into a beaker, then take 0.1 g of polyaniline nanofibers in step (1), add it to the tetraethyl orthosilicate solution, and finally place the beaker in a 40°C water bath In the pot, let stand for 24 hours. Then filter and dry.

[0036] (3) Immerse the dried product in step (2) in 1mol / L hydrochloric acid solution, let it stand for half an hour, and then filter and dry to obtain the conductive polyaniline nanofiber@silicon dioxide composite material.

Embodiment 2

[0038] The difference between embodiment 2 and embodiment 1 is: the tetraethyl orthosilicate measured in step (2) is 10 milliliters, and other steps are identical with embodiment (1).

Embodiment 3

[0040]The difference between Example 3 and Example 1 is that the resting time in the water bath in step (2) is 24 hours to 86 hours, and other steps are the same as in Example (1).

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Abstract

The invention discloses a silicon dioxide layer coated conductive polyaniline composite material and a preparation method thereof. The preparation method comprises the steps of: firstly preparing high-conductivity polyaniline fibers through a chemical polymerization method as a matrix, then, dispersing the dried conductive polyaniline fibers into a tetraethoxysilane aqueous solution, carrying outhydrolytic polycondensation on tetraethoxysilane under the action of hydrogen ions on the surface of protonated polyaniline, and uniformly coating the surfaces of the polyaniline fibers with generatedsilicon dioxide through electrostatic interaction, and drying and re-dispersing into a hydrochloric acid solution to re-dope polyaniline to finally obtain the silicon dioxide layer coated conductivepolyaniline composite material, which is mainly used in the fields of supercapacitors, lithium ion batteries and the like.

Description

technical field [0001] The invention belongs to the field of nanostructure materials, and more specifically relates to a silicon dioxide layer-coated conductive polyaniline (PANIFs@SiO 2 ) composite material and its preparation method. Background technique [0002] Compared with other conductive polymers, polyaniline has a unique doping mechanism and unique structure. There are three typical oxidation states of polyaniline: fully reduced leucoemeraldine base (LEB), semi-oxidized emeraldine base (EB) and fully oxidized pernigraniline base (PE). Different oxidation states can be transformed into each other through oxidation or reduction, accompanied by changes in color and properties. The conductivity of conductive polyaniline is maximized when the half-oxidized state of EB (emeraldine base) undergoes 50% doping (resulting in emeraldine salt), protonating all quinone rings. However, the protonated PE and LEB lack chain regularity and form very few polarons, so the doped PE ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/48H01M10/0525H01G11/24H01G11/26H01G11/86
CPCH01M4/366H01M4/38H01M4/48H01M10/0525H01G11/24H01G11/26H01G11/86Y02E60/13Y02E60/10
Inventor 郭瑞松罗亚妮厉婷婷李福运董琳琳
Owner TIANJIN UNIV