Preparation method of flexible spinning hollow carbon self-supporting electrode

A self-supporting electrode, hollow carbon technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of affecting the electrochemical performance of electrode materials, inability to fold, bulky and other problems, achieve good metal ion adsorption and storage capacity, improve electricity. The effect of high controllability of chemical reaction kinetics and operation steps

Pending Publication Date: 2022-04-22
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Traditional batteries, supercapacitors and other products are not only bulky, but also cannot be folded. When the volume changes too much, it will even cause a short circuit between the positive and negative electrodes, causing thermal runaway and causing serious safety problems. The emergence of flexible electrodes provides The key to its wide application in real life is the ability to develop flexible and compressible energy storage devices, and the development of flexible electrodes is a key issue that limits its development
Common commercial electrode materials are usually mixed with active materials, binders, and conductive agents and evenly coated on the metal current collector. The active material loading of this electrode material is usually relatively low, and it is easy to fold when the electrode occurs. Cause the active material to fall off, seriously affect the electrochemical performance of the electrode material

Method used

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  • Preparation method of flexible spinning hollow carbon self-supporting electrode

Examples

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Effect test

Embodiment 1

[0024] A method for preparing a flexible spinning hollow carbon self-supporting electrode, specifically comprising the following steps:

[0025] (1), add 1.6g resorcinol and 2.24ml formaldehyde solution into the mixed solution of 280ml ethanol and 40ml water and stir, the stirring temperature is 30°C, the stirring time is 24h, the stirring speed is 500r / min, after stirring The obtained phenolic resin was centrifuged and washed three times with ethanol and water respectively, and then dried in an ordinary oven at 80°C for 24 hours to obtain a yellow solid powder, which was transferred to a tube furnace and heated to 800 °C under the protection of argon gas. ℃, the heating rate is 5°C / min, and the holding time is 2h, a black solid powder is obtained, and after the black solid powder is etched by hydrofluoric acid (HF) with a mass fraction of 10%, hollow carbon spheres are obtained;

[0026] (2), weigh 0.2835g hollow carbon spheres and 0.567g polyacrylonitrile respectively and jo...

Embodiment 2

[0030] A method for preparing a flexible spinning hollow carbon self-supporting electrode, specifically comprising the following steps:

[0031] (1), add 1.6g resorcinol and 2.24ml formaldehyde solution into the mixed solution of 280ml ethanol and 40ml water and stir, the stirring temperature is 30°C, the stirring time is 24h, the stirring speed is 500r / min, after stirring The obtained phenolic resin was centrifuged and washed three times with ethanol and water respectively, and then dried in an ordinary oven at 80°C for 24 hours to obtain a yellow solid powder, which was transferred to a tube furnace and heated to 800 °C under the protection of argon gas. ℃, the heating rate is 5°C / min, and the holding time is 2h, a black solid powder is obtained, and after the black solid powder is etched by hydrofluoric acid (HF) with a mass fraction of 10%, hollow carbon spheres are obtained;

[0032] (2), weigh 0.1134g hollow carbon spheres and 0.567g polyacrylonitrile respectively and jo...

Embodiment 3

[0035] A method for preparing a flexible spinning hollow carbon self-supporting electrode, specifically comprising the following steps:

[0036] (1), add 1.6g resorcinol and 2.24ml formaldehyde solution into the mixed solution of 280ml ethanol and 40ml water and stir, the stirring temperature is 30°C, the stirring time is 24h, the stirring speed is 500r / min, after stirring The obtained phenolic resin was centrifuged and washed three times with ethanol and water, and then dried in a common oven at 80°C for 24 hours to obtain a yellow solid powder, which was transferred to a tube furnace and heated to 800 °C under the protection of argon gas. ℃, the heating rate is 5°C / min, and the holding time is 2h, a black solid powder is obtained, and after the black solid powder is etched by hydrofluoric acid (HF) with a mass fraction of 10%, hollow carbon spheres are obtained;

[0037] (2), weigh 0.063g hollow carbon spheres and 0.567g polyacrylonitrile respectively and join in the DMF sol...

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Abstract

The invention discloses a preparation method of a flexible spinning hollow carbon self-supporting electrode, which comprises the following steps: carbonizing phenolic resin at high temperature to obtain solid carbon spheres, etching with hydrofluoric acid to obtain hollow carbon spheres, uniformly mixing the hollow carbon spheres with polyacrylonitrile, obtaining a flexible spinning composite material through an electrostatic spinning technology, and finally, preparing the flexible spinning hollow carbon self-supporting electrode. The flexible spinning composite material is subjected to pre-oxidation and high-temperature carbonization to obtain the flexible self-supporting electrode. The prepared flexible spinning composite material is mainly formed by compounding hollow carbon spheres and polyacrylonitrile, the pore size distribution and the specific surface area of the flexible spinning composite material can be effectively changed by controlling the proportion of the hollow carbon spheres, and then the electrochemical performance of the flexible spinning composite material is regulated and controlled; meanwhile, polyacrylonitrile can provide a good three-dimensional flexible conductive framework after high-temperature carbonization, so that the conductivity is improved, the cycling stability of the self-supporting electrode is improved, and the volume expansion and shrinkage performance of the self-supporting electrode in the ion transmission process is relieved.

Description

technical field [0001] The invention relates to the technical field of flexible batteries, in particular to a method for preparing a flexible spinning hollow carbon self-supporting electrode. Background technique [0002] In recent years, with the rapid development of electronic technology, more and more electronic devices are becoming thinner and more flexible. Wearable electronic devices have attracted more and more attention, which has stimulated the field of bendable and flexible batteries. Research. Traditional batteries, supercapacitors and other products are not only bulky, but also cannot be folded. When the volume changes too much, it will even cause a short circuit between the positive and negative electrodes, causing thermal runaway and causing serious safety problems. The emergence of flexible electrodes provides The key to its wide application in real life is to be able to develop flexible and compressible energy storage devices, and the development of flexible...

Claims

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Application Information

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IPC IPC(8): H01M4/587H01M4/133H01M4/1393
CPCH01M4/587H01M4/133H01M4/1393
Inventor 程圆圆熊辉樊煜王世旭左文卿
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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