Nitrogen-doped micro-mesoporous carbon/transition metal oxide composite material and preparation method thereof

A technology of transition metals and composite materials, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve problems such as uneven distribution of metal compound nanoparticles, unfavorable metal compound precursor solution infiltration, composite electrode material structure blockage, etc. , to achieve the effect of low cost, excellent performance and improved adsorption

Active Publication Date: 2021-07-27
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, how to realize the uniform dispersion of ultra-small metal compound nanoparticles in new carbon materials still faces many severe challenges.
This is mainly caused by the following two characteristics: (1) Ultra-small nanoparticles have a high specific surface energy during the formation process, making them prone to serious agglomeration, thereby destroying the pore structure inside the new carbon material, resulting in composite The structure of the electrode material is blocked or collapsed; (2) The extremely small pore structure inside the new carbon material (such as micropores below 2 nanometers) is not conducive to the infiltration of the metal compound precursor solution, resulting in uneven distribution of metal compound nanoparticles sex

Method used

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  • Nitrogen-doped micro-mesoporous carbon/transition metal oxide composite material and preparation method thereof
  • Nitrogen-doped micro-mesoporous carbon/transition metal oxide composite material and preparation method thereof
  • Nitrogen-doped micro-mesoporous carbon/transition metal oxide composite material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0045] (1) Dissolve 5g of sucrose, 40g of zinc chloride and 0.55g of concentrated sulfuric acid in 30mL of deionized water under stirring, first react the mixed solution at 100°C for 6h, after the reaction is over, continue to react at 160°C for 6h, Prepare polysaccharide / zinc chloride complex;

[0046] (2) Take the polysaccharide / zinc chloride complex in step (1) and carry out high-temperature carbonization under an argon atmosphere, at 1°C min -1 The heating rate is raised to 900°C and kept for 2 hours, zinc chloride is sublimated at high temperature, and micro-mesoporous carbon containing a small amount of zinc-based compounds is obtained;

[0047] (3) Utilize the hydrochloric acid solution that concentration is 1mol / L to carry out pickling to the micro-mesoporous carbon containing a small amount of zinc-based compound in step (2), after removing wherein remaining zinc salt, obtain micro-mesoporous carbon;

[0048] (4) Mix 200 mg of the micro-mesoporous carbon prepared in ...

Embodiment 2

[0053] Steps (1)~(4) are identical with (1)~(4) in embodiment 1;

[0054] (5) Dissolve 40.2 mg of cobalt nitrate hexahydrate in 20 mL of ethanol;

[0055] (6) Slowly add the cobalt nitrate / ethanol solution in step (5) dropwise to 100 mg of N-STC, then dry at 60°C, and finally, pyrolyze the dried powder for 3 hours under an argon atmosphere , where the pyrolysis temperature is 500°C and the heating rate is 1°C min -1 , get N-STC / Co 3 o 4 &Co.

Embodiment 3

[0057] Steps (1)~(4) are identical with (1)~(4) in embodiment 1;

[0058] (5) Dissolve 43.1mg of nickel nitrate hexahydrate in 20mL of ethanol;

[0059] (6) Slowly add the nickel nitrate / ethanol solution in step (5) dropwise to 100mg of N-STC, then dry at 60°C, and finally, pyrolyze the dried powder for 3h under an argon atmosphere , where the pyrolysis temperature is 500°C and the heating rate is 1°C min -1 , to get N-STC / Ni 2 o 3 &NiO.

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Abstract

The invention discloses a nitrogen-doped micro-mesoporous carbon / transition metal oxide composite material and a preparation method thereof, belonging to the technical field of new energy storage materials. The composite material of the invention is obtained by in-situ high-temperature pyrolysis growth of ultra-small transition metal oxide nanoparticles in a three-dimensional network structure of nitrogen-doped micro-mesoporous carbon by using various transition metal oxide salts as precursors. The nitrogen-doped micro-mesoporous carbon / transition metal oxide composite material prepared by the present invention fully utilizes the size advantage of nitrogen-doped micro-mesoporous carbon, so that the prepared composite material has a higher specific surface area and a more complex The microscopic pore structure provides paths and spaces for the transport and storage of electrolyte ions. At the same time, the successful loading of ultra-small transition metal oxide nanoparticles brings the possibility of efficient adsorption of electrolyte ions, which in turn greatly improves the electrochemical energy storage performance.

Description

technical field [0001] The invention relates to a nitrogen-doped micro-mesoporous carbon / transition metal oxide composite material and a preparation method thereof, belonging to the technical field of new energy storage materials. Background technique [0002] As a common type of energy storage device, supercapacitors have the advantages of high power density, high capacity, and high cycle life, and have been widely used in daily production and life. However, compared with battery energy storage technology, the low power density of supercapacitors greatly reduces the possibility of it being used as a gapless and long-term energy supply. In order to overcome this problem, scientists double-regulated the electrolyte and electrode materials of the supercapacitor in order to expand the potential window of the supercapacitor device, thereby increasing the power density of the overall device. At present, the commonly used electrolytes for supercapacitors are mainly aqueous electr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/26H01G11/32H01G11/46H01G11/86
CPCH01G11/26H01G11/32H01G11/46H01G11/86
Inventor 刘天西赖飞立楚凯斌秦静静
Owner JIANGNAN UNIV
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