Porous carbon material and preparation method thereof and supercapacitor

A technology of porous carbon materials and potassium bicarbonate, applied in hybrid capacitor electrodes, chemical instruments and methods, carbon compounds, etc., can solve the problems of waste of activators and failure to maximize the activation effect of activators

Active Publication Date: 2021-07-06
GUANGZHOU AUTOMOBILE GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, the activation effect of the activator is not maximized because the coal powder and the activator are simply dry-mixed, resulting in waste of the activator

Method used

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  • Porous carbon material and preparation method thereof and supercapacitor
  • Porous carbon material and preparation method thereof and supercapacitor
  • Porous carbon material and preparation method thereof and supercapacitor

Examples

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preparation example Construction

[0036] (1) Preparation of two-electrode organic capacitor electrodes: activated carbon (80wt%), Super P (10wt%, as a conductive agent) and a binder shared by CMC and SBR (10wt%, CMC:SBR=1:2) The three samples were stirred in deionized water until uniform, coated on aluminum foil with a spatula, and dried overnight in a vacuum oven at 60°C. Gained pole pieces were cut into discs with a diameter of 12 mm, and were further dried and put into a glove box for subsequent use.

[0037] (2) Assembling two-electrode organic capacitors: the button cell uses a CR2032 button cell shell, and a lithium sheet with a diameter of 16 mm is used as the counter electrode. Using propylene carbonate (PC) dissolved in 1mol / L TEATFB as the electrolyte, and Celgard 2300PP / PE / PP three-layer microporous composite membrane as the diaphragm, the positive and negative electrode sheets and the diaphragm were stacked and assembled, and then punched and sealed. All assembly procedures were performed in a dry g...

Embodiment 1

[0040] An embodiment of the preparation method of the porous carbon material described in the present invention, the preparation method of the porous carbon material described in this embodiment comprises the following steps:

[0041] (1) Immerse 100g of macroporous acrylic adsorbent resin in dilute hydrochloric acid, filter after soaking for a period of time, then add it to 400mL of cobalt chloride aqueous solution with a concentration of 0.2mol / L, stir for 2 hours, and then put it in an 80°C water bath for stirring Evaporate to dryness, and continue to dry in an 80°C blast drying oven for 12 hours to obtain a resin that adsorbs cobalt ions; after drying, pass through a 200-mesh sieve;

[0042] (2) Dissolve 50g of calcium hydroxide in 800mL of deionized water to form a calcium hydroxide solution, add the product obtained in step (1) and 100g of potassium bicarbonate into the calcium hydroxide solution, put into an 80°C oil bath and stir to evaporate, and wait After the mixtur...

Embodiment 2

[0047] An embodiment of the preparation method of the porous carbon material described in the present invention, the preparation method of the porous carbon material described in this embodiment comprises the following steps:

[0048] (1) Immerse 100g of the pretreated macroporous acrylic adsorbent resin in dilute hydrochloric acid, filter after soaking for a period of time, then add it to 400mL of cobalt chloride aqueous solution with a concentration of 0.2mol / L, stir for 2 hours and put Stir in a water bath at 80°C and evaporate to dryness, then continue to dry in an 80°C blast drying oven for 12 hours to obtain a resin that adsorbs cobalt ions; pass through a 200-mesh sieve after drying;

[0049] (2) Dissolve 100g of calcium hydroxide in 800mL of deionized water to form a calcium hydroxide solution, add the product obtained in step (1) and 100g of potassium bicarbonate into the calcium hydroxide solution, put into an 80°C oil bath and stir to evaporate, and wait After the m...

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Abstract

The invention provides a preparation method of a porous carbon material. The method comprises the following steps: (1) putting a large-grid resin into a transition metal salt solution, stirring, and drying; (2) adding the product obtained in the step (1) and potassium bicarbonate into a calcium hydroxide solution, stirring and drying; and (3) carbonizing the product obtained in the step (2) in an inert atmosphere to obtain the porous carbon material. The preparation method of the porous carbon material has the advantages that the process is simple, later template etching is not needed, non-carbon residues are easy to remove, the cost is low, part of raw materials can be recycled, and large-scale production is easy to achieve; calcium hydroxide and potassium bicarbonate are adopted as pore-forming agents, and the pore structure in the carbon material can be regulated and controlled by regulating and controlling the ratio of the resin to the two alkalis; activated carbon has the advantages of few layers, large specific surface area, high conductivity, low density, difficulty in re-stacking and the like; and the liquid absorption amount is low, and the pole piece coating process performance is good.

Description

technical field [0001] The invention relates to a carbon material and a preparation method thereof, in particular to a porous carbon material, a preparation method thereof and a supercapacitor. Background technique [0002] Supercapacitors are a new class of energy storage devices that are widely used. At present, supercapacitors have great potential application value in many fields, such as mobile communication, consumer electronics, electric vehicles, aerospace and so on. While the performance of supercapacitors mainly depends on the electrode active materials, these materials are still difficult to meet many needs of the current society due to their relatively low energy density. At present, the industry mainly uses the KOH activation method to chemically activate petroleum coke and biomass to obtain activated carbon, although the KOH method can obtain 2000m 2 Activated carbon above / g, but this method is highly corrosive and will cause corrosion to the prepared equipme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/312C01B32/348H01G11/24H01G11/34
CPCC01B32/312C01B32/348H01G11/24H01G11/34Y02E60/13
Inventor 曹树彬刘凡顾晓瑜殷先德长世勇
Owner GUANGZHOU AUTOMOBILE GROUP CO LTD
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