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N-doped porous carbon/NiO composite material and preparation method therefor

A composite material and porous carbon technology, which can be used in the manufacture of hybrid/electric double-layer capacitors, hybrid capacitor electrodes, etc., and can solve the problems of narrow potential window, high price, and dense structure.

Active Publication Date: 2015-10-07
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Metal oxides have high specific capacitance, but poor conductivity, dense structure, narrow potential window and expensive

Method used

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  • N-doped porous carbon/NiO composite material and preparation method therefor
  • N-doped porous carbon/NiO composite material and preparation method therefor
  • N-doped porous carbon/NiO composite material and preparation method therefor

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Experimental program
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Effect test

Embodiment 1

[0039] The preparation method of the N-doped porous carbon / NiO composite material of this embodiment includes:

[0040] Step 1, preparing coal-based polyaniline by in-situ polymerization, specifically comprising the following steps:

[0041] Step 101. Mix 10 g of aniline, 30 mL of concentrated hydrochloric acid (37% in mass concentration) and 60 mL of water to obtain a mixed solution B, add 10 g of coal powder to the mixed solution B, stir and swell at 30°C for 3 hours to obtain swollen coal Sample;

[0042] Step 102. Add 80 mL of ammonium persulfate aqueous solution with a concentration of 0.30 g / mL dropwise to the swollen coal sample described in step 101 in a 3° C. ice-water bath with stirring at a rate of 2 mL / min. After the dropwise addition is completed, Continue to stir for 6 hours under the condition of ice-water bath at 3°C, filter with suction, wash the filter cake obtained by suction filtration, then vacuum-dry the filter cake after washing, grind it, and pass it t...

Embodiment 2

[0048] The preparation method of the N-doped porous carbon / NiO composite material of this embodiment includes:

[0049] Step 1, preparing coal-based polyaniline by in-situ polymerization, specifically comprising the following steps:

[0050] Step 101: Mix 20g of aniline, 30mL of concentrated hydrochloric acid (37% in mass concentration) and 50mL of water to obtain a mixed solution B, add 10g of coal powder to the mixed solution B, stir and swell at 35°C for 2h to obtain swollen coal Sample;

[0051] Step 102. Add 100 mL of ammonium persulfate aqueous solution with a concentration of 0.48 g / mL dropwise to the swollen coal sample described in step 101 under agitation in an ice-water bath at 0° C. at a rate of 3 mL / min. After the dropwise addition is completed, Continue to stir for 8 hours under the condition of an ice-water bath at 0°C, filter with suction, wash the filter cake obtained by suction filtration, then dry the washed filter cake in vacuum, grind it, and pass it thro...

Embodiment 3

[0057] The preparation method of the N-doped porous carbon / NiO composite material of this embodiment includes:

[0058] Step 1, preparing coal-based polyaniline by in-situ polymerization, specifically comprising the following steps:

[0059] Step 101. Mix 10g of aniline, 25mL of concentrated hydrochloric acid (37% in mass concentration) and 55mL of water to obtain a mixed solution B, add 8g of coal powder to the mixed solution B, stir and swell at 25°C for 2.5h to obtain a swollen coal sample;

[0060] Step 102. Add 60 mL of ammonium persulfate aqueous solution with a concentration of 0.40 g / mL dropwise to the swollen coal sample described in step 101 in an ice-water bath at 5° C. with stirring at a rate of 1 mL / min. After the dropwise addition is completed, Continue to stir for 7 hours under the condition of ice-water bath at 5°C, filter with suction, wash the filter cake obtained by suction filtration, then vacuum-dry the filter cake after washing, grind it, and pass it thr...

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Abstract

The invention discloses a N-doped porous carbon / NiO composite material and a preparation method therefor. The preparation method comprises the following steps: first, coal-based polyaniline is prepared through a in-situ polymerization method; second, nickle powder and coal-based polyaniline are mixed uniformly to obtain a mixture, the mixture is subjected to pyrolysis and a N-doped porous carbon / Ni composite material is obtained; third, hydrogen peroxide and sulfuric acid are mixed uniformly and a mixed solution A is obtained; fourth, the N-doped porous carbon / Ni composite material is added in the mixed solution A, after mixing processing is carried out, the pH value is adjusted to 7-8 through ammonium hydroxide, next a urea aqueous solution is added drop by drop, insulation stirring is carried out, pumping filtration is carried out after cooling, a filter cake is washed, the filter cake is calcined, and a N-doped porous carbon / NiO composite material is obtained. N-doped porous carbon in the N-doped porous carbon / NiO composite material prepared through the method shows pore structure characteristics of meso pores as the main and macropores as the part and NiO in the composite material exists in a form of nanosheets or nanospheres.

Description

technical field [0001] The invention belongs to the interdisciplinary technical field of energy materials, functional materials and mineral processing, and specifically relates to a N-doped porous carbon / NiO composite material and a preparation method thereof. Background technique [0002] Supercapacitors have been widely studied because they can be used in parallel with batteries as auxiliary power sources to make up for the power shortage of batteries when starting, braking and climbing electric vehicles, to balance battery loads, and to prolong battery life. 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 supercapacitors are mainly divided into: carbon materials, metal oxides and conductive polymers. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/26H01G11/44H01G11/46
CPCY02E60/13H01G11/24H01G11/30H01G11/32H01G11/44H01G11/46H01G11/86
Inventor 汪晓芹李侃社熊善新周安宁宫铭褚佳吴伯华张永操植刘鸿翔刘静张润兰
Owner XIAN UNIV OF SCI & TECH
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