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Carbon material used for supercapacitor electrode material and preparation method thereof

A technology for supercapacitors and electrode materials, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double-layer capacitors, etc., can solve the problems of excessive use of organic chemical reagents, complex processes, and high costs, and achieve good electrochemical performance and process flow. The effect of short, high energy density

Active Publication Date: 2017-03-22
ZHEJIANG FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current method for preparing carbon aerogels has many problems such as excessive use of organic chemical reagents, large pollution, high cost, and complicated process. Carbon materials for high-performance supercapacitors

Method used

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  • Carbon material used for supercapacitor electrode material and preparation method thereof
  • Carbon material used for supercapacitor electrode material and preparation method thereof
  • Carbon material used for supercapacitor electrode material and preparation method thereof

Examples

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preparation example Construction

[0031] figure 1 A block diagram showing a method for preparing a carbon material provided by an embodiment of the present invention, such as figure 1 Shown, a kind of preparation method of carbon material, comprises the steps:

[0032] S101: subjecting biomass raw materials to hydrothermal treatment to obtain a hydrogel;

[0033] Specifically: Put the paste or block biomass raw materials into the reactor, which is usually lined with polytetrafluoroethylene, seal the reactor and place it in an oven at 150-300°C for 6-48 hours, then carry out hydrothermal treatment , cooling the reaction kettle after hydrothermal treatment, usually naturally cooling to room temperature, taking out the product in the kettle to obtain a hydrogel. The type of raw materials, the conditions of hydrothermal treatment, etc. all have certain influence on the performance of carbon materials. In order to further improve the electrochemical performance of carbon materials, the raw materials are preferabl...

Embodiment 1

[0042] The preparation method of the carbon material provided in this embodiment adopts the following steps:

[0043] S101: Pound the kiwi fruit into a paste, take 40ml of the paste and put it into a polytetrafluoroethylene-lined reactor with a capacity of 100ml, seal the reactor well, put it in an oven at 180°C for 24 hours, and carry out hydrothermal reaction , after the reaction kettle is naturally cooled to room temperature, the product in the kettle is taken out to obtain a massive hydrogel;

[0044] S102: Soak the block hydrogel obtained in S101 in a 50% ethanol aqueous solution to remove impurities, soak for 24 hours and then filter, then soak the block hydrogel for a second time to remove impurities, and co-immerse to remove impurities 4 times, each soaking time is 24h, to obtain the semi-purified block gel, and then soak the semi-purified block gel in deionized water, each soaking 5h, soaking 2 times in total, Obtain block hydrogel after impurity removal;

[0045] S...

Embodiment 2～7

[0049] The preparation methods of the carbon materials provided in Examples 2-7 are similar to those in Example 1, with some parameters changed, see Table 1 for details, and the parameters not listed are the same as those in Example 1.

[0050] Important parameters involved in the preparation method of the carbon material provided in Table 1 Examples 1-7

[0051]

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Abstract

The invention relates to a carbon material used for a supercapacitor electrode material and a preparation method of the carbon material. The preparation method comprises the following steps: S101, putting biomass raw materials into a reaction kettle for carrying out hydro-thermal treatment so as to obtain a hydrogel; S102, soaking the hydrogel into an ethanol water solution and water in sequence for carrying out impurity removal so as to obtain a hydrogel after impurity removal; S103, carrying out drying treatment on the hydrogel after impurity removal so as to obtain an aerogel; and S104, calcining the aerogel in an atmosphere of nitrogen or rare gas so as to obtain the carbon material. The preparation method of the carbon material provided by the invention is simple, low in cost, clean and environmentally-friendly, and accords with a green and sustainable principle; and the prepared carbon material has a reasonably distributed three-dimensional porous structure with relatively high specific surface area, has the characteristics of great specific capacitance and high cycling stability when serving as the supercapacitor electrode material, is applicable to high-performance supercapacitors, and has relatively high practical values.

Description

technical field [0001] The invention relates to the technical field of supercapacitor carbon-based electrode materials, in particular to a carbon material used for supercapacitor electrode materials and a preparation method thereof. Background technique [0002] With the promotion and rapid development of electric vehicles, people have put forward new requirements for the performance of mobile chemical power sources, not only requiring higher energy density to provide lasting power, but also requiring higher power density to meet the needs of fast start-up and High power demands during acceleration and hill climbing. Therefore, new chemical power sources with high specific energy and high power density have become research hotspots worldwide. The specific energy of the battery system is high, but the power density is often not enough. Capacitors are the representative of high-power storage devices. However, the ability of physical capacitors to store charges is very weak, ...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/24H01G11/44
CPCH01G11/24H01G11/44H01G11/86Y02E60/13
Inventor 孙庆丰王超金春德熊业范必涛
Owner ZHEJIANG FORESTRY UNIVERSITY
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