Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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
View PDF2 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to make coal pyrolysis produce more gaseous hydrocarbons, hydrogen is often passed through during pyrolysis, which brings hidden dangers to operation safety

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • 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

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0035] Step 1, preparing coal-based polyaniline by in-situ polymerization, specifically comprising the following steps:

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

[0037] Step 102. Add 60 mL of ammonium persulfate aqueous solution with a concentration of 0.27 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 1 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 th...

Embodiment 2

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

[0044] Step 1, preparing coal-based polyaniline by in-situ polymerization, specifically comprising the following steps:

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

[0046] Step 102. In an ice-water bath at 0°C, add 60 mL of ammonium persulfate aqueous solution with a concentration of 0.20 g / mL dropwise to the swollen coal sample described in step 101 under agitation at a rate of 2 mL / min. 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 through a 200-mesh screen to obtain coal-bas...

Embodiment 3

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

[0053] Step 1, preparing coal-based polyaniline by in-situ polymerization, specifically comprising the following steps:

[0054] Step 101, mix 3.3g of aniline, 25mL of concentrated hydrochloric acid (37% in mass concentration) and 61.7mL of water to obtain a mixed solution A, add 10g of coal powder to the mixed solution A, 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 dropwise to the swollen coal sample described in step 101 under stirring in an ice-water bath at 5° C. at a rate of 3 mL / min. After the addition is complete, 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 throu...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Average pore sizeaaaaaaaaaa
Specific surfaceaaaaaaaaaa
Pore volumeaaaaaaaaaa
Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com