Method for preparing N-doped porous carbon/ferric oxide compound powder

A technology of composite powder and iron oxide, which is applied in the manufacture of hybrid/electric double-layer capacitors and electrodes of hybrid capacitors, can solve problems such as hidden dangers in operation safety, and achieve synergistic effects of optimized structure and capacitance performance

Active Publication Date: 2016-08-10
XIAN UNIV OF SCI & TECH
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Problems solved by technology

In order to make coal pyrolysis produce more gaseous hydrocarbons, hydrogen is oft

Method used

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  • Method for preparing N-doped porous carbon/ferric oxide compound powder
  • Method for preparing N-doped porous carbon/ferric oxide compound powder
  • Method for preparing N-doped porous carbon/ferric oxide compound powder

Examples

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Example Embodiment

[0033] Example 1

[0034] The preparation method of the N-doped porous carbon / iron oxide composite powder of this embodiment includes:

[0035] Step 1. The preparation of coal-based polyaniline by in-situ polymerization includes the following steps:

[0036] Step 101: Mix 6.7 g of aniline, 25 mL of concentrated hydrochloric acid (with a mass concentration of 37%) and 60 mL of water to obtain a mixed solution A, add 10 g of coal powder to the mixed solution A, and stir and swell at 30°C for 2 hours to obtain swelling Coal sample

[0037] Step 102: Add 60 mL of ammonium persulfate aqueous solution with a concentration of 0.27 g / mL to the swelled coal sample described in step 101 in an ice water bath at 3°C ​​under stirring conditions, with a dropping rate of 1 mL / min. After the addition is complete Continue to stir for 6 hours in an ice-water bath at 3°C, filter by suction, wash the filter cake obtained by suction, and then vacuum dry the washed filter cake and grind, and pass through ...

Example Embodiment

[0042] Example 2

[0043] The preparation method of the N-doped porous carbon / iron oxide composite powder of this embodiment includes:

[0044] Step 1. The preparation of coal-based polyaniline by in-situ polymerization includes the following steps:

[0045] Step 101. Mix 5g of aniline, 25mL of concentrated hydrochloric acid (with a mass concentration of 37%) and 60mL of water to obtain a mixed solution A, add 10g of coal powder to the mixed solution A, and stir and swell at 25°C for 3h to obtain swollen coal kind;

[0046] Step 102: Add 60 mL of ammonium persulfate aqueous solution with a concentration of 0.20 g / mL to the swollen coal sample described in step 101 in an ice water bath at 0°C under stirring conditions, with a dropping rate of 2 mL / min. After the addition is complete Continue to stir for 8 hours in an ice-water bath at 0°C, filter with suction, wash the filter cake obtained by the suction filter, and then vacuum dry the washed filter cake and grind, and pass through a ...

Example Embodiment

[0051] Example 3

[0052] The preparation method of the N-doped porous carbon / iron oxide composite powder of this embodiment includes:

[0053] Step 1. The preparation of coal-based polyaniline by in-situ polymerization includes the following steps:

[0054] Step 101: Mix 3.3g of aniline, 25mL of concentrated hydrochloric acid (with a mass concentration of 37%) and 61.7mL of water to obtain a mixed solution A. Add 10g of coal powder to the mixed solution A, and stir and swell at 35°C for 2.5h. Obtain a swollen coal sample;

[0055] Step 102: Add 60 mL of ammonium persulfate aqueous solution with a concentration of 0.13 g / mL to the swollen coal sample described in step 101 in an ice water bath at 5°C under stirring conditions at a rate of 3 mL / min. After the addition is complete Continue to stir for 7 hours in an ice-water bath at 5°C, filter with suction, wash the filter cake obtained by the suction filter, and then vacuum dry the washed filter cake and grind, and pass through a 200 ...

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Abstract

The invention discloses a method for preparing N-doped porous carbon/ferric oxide compound powder. The method includes the steps of preparing coal-based polyaniline composites through in-situ polymerization, uniformly mixing ferric citrate with hot water to obtain a ferric citrate solution, adding the coal-based polyaniline composites in the ferric citrate solution, mixing, subjecting the result to vacuum thermal treatment to obtain paste, pyrolyzing the paste, and cooling the pyrolyzed paste to obtain the N-doped porous carbon/ferric oxide compound powder. The N doping amount in the N-doped porous carbon/ferric oxide compound powder is 0.122wt%-0.258wt%, the N-doped porous carbon has rich mesopores and macropores, and ferric oxide exist in the state of micro-nano spheres. When the N-doped porous carbon/ferric oxide compound powder is used as active electrode material to prepare a N-doped porous carbon/ferric oxide electrode material, the single electrode specific capacitance of the N-doped porous carbon/ferric oxide electrode material reaches 279.5F/g under the constant current density of 2.0A/g.

Description

technical field [0001] The invention belongs to the interdisciplinary technical field of mineral deep processing, energy and functional materials, and in particular relates to a preparation method of N-doped porous carbon / iron oxide composite powder. Background technique [0002] Supercapacitors not only have the characteristics of high power density, short charging time, high charge and discharge efficiency, long cycle life, and can work at ultra-low temperature of traditional batteries, but also have energy density closer to lithium batteries, so they become One of the key technologies for the promotion of power vehicles. The electrode materials of supercapacitors directly affect the performance of supercapacitors, so the preparation of electrode materials with high specific capacitance, high specific power and specific energy, and stable charge and discharge becomes the key to solving the problem. At present, the electrode materials of commercial supercapacitors are main...

Claims

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Application Information

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IPC IPC(8): H01G11/32H01G11/38H01G11/46H01G11/86
CPCH01G11/32H01G11/38H01G11/46H01G11/86Y02E60/13
Inventor 汪晓芹张永赵捷李侃社熊善新宫铭周安宁陈创前闫兰英刘鸿翔徐金鑫杨甲甲吴伯华褚佳张润兰
Owner XIAN UNIV OF SCI & TECH
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