Preparation method of supercapacitor carbon material

A technology of supercapacitors and carbon materials, applied in the manufacture of hybrid/electric double layer capacitors, electrodes of hybrid capacitors, etc., can solve the problems of excessive use of organic chemical reagents, small specific volume of electrode materials, and no practical application value, etc., to achieve easy large-scale Batch preparation and industrial production, the effect of increasing specific volume and large specific volume

Active Publication Date: 2014-11-19
JIANGSU SUPERBIO LIFE SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that the current preparation of carbon aerogels has many problems such as the use of organic chemical reagents, heavy pollution, high production costs, and complicated processes. If some cheap biomass can be used as raw materials and a clean and simple process can be used to prepare carbon aerogels Rubber mate

Method used

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  • Preparation method of supercapacitor carbon material
  • Preparation method of supercapacitor carbon material
  • Preparation method of supercapacitor carbon material

Examples

Experimental program
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Example Embodiment

[0025] Example 1:

[0026] A method for preparing a carbon material for supercapacitors, comprising the following steps:

[0027] ①Water Heat: Set the volume to 3cm 3 The radish pieces were completely immersed in a reactor containing 30 ml of thiourea solution with a concentration of 10% by mass, the reactor was sealed and placed in an oven at 200 ° C for 6 hours, then cooled to room temperature, and the block water was taken out. gel;

[0028] ②Removal of impurities: soak the bulk hydrogel obtained in ① in anhydrous ethanol and pure water for 3 times, each time for 8 hours to remove impurities;

[0029] ③ Freeze-drying: pre-freeze the bulk hydrogel obtained in ② at -50°C for 6 hours, and then freeze-dry it at -60°C and 1Pa pressure for 48 hours to obtain the bulk aerogel;

[0030] ④Calcination: calcine the bulk aerogel obtained in ③ at 850°C for 1.5 hours under argon atmosphere, and grind the aerogel into gel powder after cooling;

[0031] ⑤Activation: Mix the gel powde...

Example Embodiment

[0033] Example 2:

[0034] A method for preparing a carbon material for supercapacitors, comprising the following steps:

[0035] ①Water Heat: Set the volume to 4cm 3 The lumpy grapefruit peel was completely immersed in a reactor containing 60ml of thiourea solution with a concentration of 5% by mass, the reactor was sealed and placed in an oven at 220 ° C for 4 hours, then cooled to room temperature, and the block was taken out. hydrogel;

[0036] ②Removal of impurities: soak the bulk hydrogel obtained in ① in anhydrous ethanol and pure water for 3 times, each time for 8 hours to remove impurities;

[0037] ③ Freeze-drying: pre-freeze the bulk hydrogel obtained in ② at -50°C for 6 hours, and then freeze-dry it at -60°C and 1Pa pressure for 48 hours to obtain the bulk aerogel;

[0038] ④Calcination: calcine the bulk aerogel obtained in ③ at 800°C for 2 hours under argon atmosphere, and grind the aerogel into gel powder after cooling;

[0039] ⑤Activation: Mix the gel pow...

Example Embodiment

[0041] Example 3:

[0042] A method for preparing a carbon material for supercapacitors, comprising the following steps:

[0043] ①Water Heat: Set the volume to 6cm 3 The sweet potato pieces were completely immersed in the reactor containing 30ml of thiourea solution with a mass percentage concentration of 15%, the reactor was sealed and placed in an oven at 190 ° C for 8 hours, then cooled to room temperature, and the block water was taken out. gel;

[0044] ②Removal of impurities: soak the bulk hydrogel obtained in ① in anhydrous ethanol and pure water for 3 times, each time for 8 hours to remove impurities;

[0045]③ Freeze-drying: pre-freeze the bulk hydrogel obtained in ② at -50°C for 6 hours, and then freeze-dry it at -60°C and 1Pa pressure for 48 hours to obtain the bulk aerogel;

[0046] ④ Calcination: calcine the bulk aerogel obtained in ③ at 900° C. for 1 hour under an argon atmosphere, and grind the aerogel into gel powder after cooling;

[0047] ⑤Activation: ...

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Abstract

The invention provides a preparation method of a supercapacitor carbon material. In the method, cheap and easily available biomass such as pericarp, vegetables and the like is taken as raw materials, and the supercapacitor carbon material is obtained through steps including thiourea hydro-thermal processing, impurity removing processing, freeze drying processing, calcining processing, alkali/microwave activation processing and the like. The material has the characteristics of a layered structure and a large specific surface area. Since a thiourea hydro-thermal step is carried out in a preparation process, S and N in thiourea molecules are introduced, the specific volume of the material is effectively improved, and an electrode prepared by use of the material has the advantages of large specific volume and good circulating stability. According to the invention, wastes such as watermelon peel, shaddock peel and the like and cheap vegetables such as sweet potatoes, radishes and the like are taken as the raw materials, such that the production cost is decreased, and the preparation method also accords with the strategy of sustainable development for environmental protection and has an important popularization value.

Description

technical field [0001] The invention belongs to the field of supercapacitor electrode materials, and in particular relates to a preparation method of a carbon material for supercapacitors. [0002] Background technique [0003] Supercapacitors are a new type of green energy storage device between batteries and traditional capacitors. They have the advantages of high power density, short charging time, and long cycle life. They are widely used as driving power for electric vehicles and backup power for mobile communication equipment. wait. The performance of supercapacitors mainly depends on their electrode materials. Commonly used supercapacitor electrode materials mainly include carbon materials, transition metal (hydr) oxides, and some conductive polymers, among which carbon materials have attracted extensive attention because of their good charge-discharge stability. At present, the carbon materials used in supercapacitors mainly consist of activated carbon, carbon nan...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/26
CPCY02E60/13
Inventor 雷惊雷李凌杰徐静张洁葛梦琪黄涛潘复生
Owner JIANGSU SUPERBIO LIFE SCI CO LTD
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