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Phosphor-doped porous carbon material for super capacitor and preparation method thereof

A technology of porous carbon materials and supercapacitors, applied in the field of materials, can solve the problems of low specific capacitance and high cost, and achieve high specific surface area, low cost and environmental friendliness

Active Publication Date: 2014-04-09
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention aims to solve the technical problems of high cost and low specific capacitance of existing materials, and provides a phosphorus-doped porous carbon material for supercapacitors with simple process and low cost and its preparation method

Method used

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  • Phosphor-doped porous carbon material for super capacitor and preparation method thereof
  • Phosphor-doped porous carbon material for super capacitor and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Add 2g of glucose, 1g of phosphoric acid and 0.2g of sulfuric acid into 5g of deionized water respectively, and then stir at 100r / min for 5 hours.

[0019] The homogeneous mixed solution was pre-reacted for 48 hours in a forced air drying oven at a temperature of 100° C. to obtain a solid mixture.

[0020] The pre-reaction product was placed in a high-temperature carbonization furnace, and the temperature was raised to 800°C at a heating rate of 7°C / min under a nitrogen atmosphere, carbonized at a constant temperature for 0.5 hours, and then naturally cooled to room temperature to prepare a phosphorus-doped porous carbon material .

[0021] Thoroughly mix phosphorus-doped porous carbon material (80wt%), conductive carbon black Super-P (10wt%) and polyvinylidene fluoride (10wt%) through mortar grinding, and then add 50 times the mass of polyvinylidene fluoride In the N-methylpyrrolidone, stir well to form a paste. Using a platinum sheet as a current collector, the abov...

Embodiment 2

[0023] Add 2g of glucose, 1g of phosphoric acid and 1g of sulfuric acid into 10g of deionized water respectively, and then stir at 500r / min for 1 hour.

[0024] The homogeneous mixed solution was pre-reacted for 24 hours in a forced air drying oven at a temperature of 150° C. to obtain a solid mixture.

[0025] The pre-reaction product was placed in a high-temperature carbonization furnace, and the temperature was raised to 800°C at a heating rate of 5°C / min under a nitrogen atmosphere, carbonized at a constant temperature for 1 hour, and then naturally cooled to room temperature to obtain a phosphorus-doped porous carbon material .

[0026] Thoroughly mix phosphorus-doped porous carbon material (80wt%), conductive carbon black Super-P (10wt%) and polyvinylidene fluoride (10wt%) through mortar grinding, and then add 50 times the mass of polyvinylidene fluoride In the N-methylpyrrolidone, stir well to form a paste. Using a platinum sheet as a current collector, the above-ment...

Embodiment 3

[0028] Add 2 g of fructose, 0.5 g of phosphoric acid and 1 g of sulfuric acid into 10 g of deionized water respectively, and then stir at 300 r / min for 3 hours.

[0029] The homogeneous mixed solution was pre-reacted for 12 hours in a forced air drying oven at a temperature of 200° C. to obtain a solid mixture.

[0030] The pre-reaction product was placed in a high-temperature carbonization furnace, and the temperature was raised to 800°C at a heating rate of 10°C / min under a nitrogen atmosphere, carbonized at a constant temperature for 2 hours, and then naturally cooled to room temperature to obtain a phosphorus-doped porous carbon material .

[0031] Thoroughly mix phosphorus-doped porous carbon material (80wt%), conductive carbon black Super-P (10wt%) and polyvinylidene fluoride (10wt%) through mortar grinding, and then add 50 times the mass of polyvinylidene fluoride In the N-methylpyrrolidone, stir well to form a paste. Using a platinum sheet as a current collector, the...

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Abstract

The invention relates to a phosphor-doped porous carbon material for a super capacitor and a preparation method thereof, and helps to solve the technical problems that the cost of conventional materials is high and specific capacitance is low. The phosphor-doped porous carbon material for the super capacitor comprises 65-98wt% carbon, 1.5-23wt% oxygen and 0.5-12wt% phosphor. The invention also provides a preparation method of the phosphor-doped porous carbon material. The phosphor-doped porous carbon material can be widely used in the field of preparation of the super capacitor material.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a phosphorus-doped porous carbon material for supercapacitors and a preparation method thereof. Background technique [0002] Supercapacitor has high specific energy, high power density, and long service life. It is a high-performance energy storage device between secondary batteries and traditional capacitors. Supercapacitors are widely used in microelectronic devices, automobile starting devices, solar energy, wind power storage and other fields. The depletion of petrochemical energy has prompted unprecedented attention to new energy products such as supercapacitors and lithium-ion batteries. [0003] Porous carbon materials are the most widely used electrode materials for supercapacitors due to their large specific surface area, stable physical and chemical properties, controllable structure, and relatively low price. At present, the methods for preparing porous carbon m...

Claims

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Application Information

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IPC IPC(8): H01G11/38C01B31/02C01B32/05
CPCY02E60/13
Inventor 于运花晏晓东杨小平
Owner BEIJING UNIV OF CHEM TECH
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