Preparation method and application of pomegranate-like porous carbon microsphere material

A porous carbon and pomegranate-shaped technology, which is applied in the field of preparation of pomegranate-shaped porous carbon microsphere materials, can solve the problems of failure to meet the requirements of excellent electrode performance for supercapacitors, low specific surface area and capacitance, and complicated preparation methods, and achieve suitable Large-scale production, strong electrical conductivity, and simple preparation of raw materials

Active Publication Date: 2022-03-11
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation method is relatively complicated and time-consuming, and the specific surface area and capacitance value of the obtained product are low, which fails to meet the excellent electrode performance requirements of supercapacitors

Method used

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  • Preparation method and application of pomegranate-like porous carbon microsphere material
  • Preparation method and application of pomegranate-like porous carbon microsphere material
  • Preparation method and application of pomegranate-like porous carbon microsphere material

Examples

Experimental program
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Effect test

Embodiment 1

[0039] (1) Weigh 1.5g of m-aminophenol, add 1.52ml of 37wt% formaldehyde solution, and 150ml of deionized water, and mix and stir for ten minutes to form a milky white solution;

[0040] (2) The solution obtained in step (1) is injected by a peristaltic pump and spray-dried to obtain a powder sample. The sampling rate of the peristaltic pump is 1.5ml / min, and the drying temperature is 120°C;

[0041] (3) The powder sample obtained in step (2) was sintered and carbonized under an inert atmosphere for 2 hours to obtain a precursor, and the sintering temperature was 500° C.;

[0042] (4) Mix the precursor obtained in step (3) with potassium hydroxide, and activate it under an inert atmosphere for 2 hours, the mass ratio of the precursor potassium hydroxide is 1:3, and the activation temperature is 700°C;

[0043] (5) The mixture obtained in step (4) is centrifugally washed and dried to obtain a pomegranate-shaped porous carbon microsphere material.

[0044] Such as figure 1 As ...

Embodiment 2

[0050] (1) Weigh 2.5g of m-aminophenol, add 3.3ml of 37wt% formaldehyde solution, 250ml of deionized water, and mix and stir for ten minutes to form a milky white solution;

[0051] (2) The solution obtained in step (1) is injected by a peristaltic pump and spray-dried to obtain a powder sample. The sampling rate of the peristaltic pump is 2ml / min, and the drying temperature is 140°C;

[0052] (3) The powder sample obtained in step (2) was sintered and carbonized under an inert atmosphere for 2 hours to obtain a precursor, and the sintering temperature was 500° C.;

[0053] (4) Mix the precursor obtained in step (3) with potassium hydroxide, and activate it under an inert atmosphere for 2 hours, the mass ratio of the precursor potassium hydroxide is 1:3, and the activation temperature is 700°C;

[0054] (5) The mixture obtained in step (4) is centrifugally washed and dried to obtain a pomegranate-shaped porous carbon microsphere material.

Embodiment 3

[0056] (1) Weigh 0.5g of m-aminophenol, add 0.8ml of 37wt% formaldehyde solution, 60ml of deionized water, mix and stir for ten minutes, and form a milky white solution;

[0057] (2) The solution obtained in step (1) is injected by a peristaltic pump and spray-dried to obtain a powder sample. The sampling rate of the peristaltic pump is 1ml / min, and the drying temperature is 130°C;

[0058] (3) The powder sample obtained in step (2) was sintered and carbonized under an inert atmosphere for 2 hours to obtain a precursor, and the sintering temperature was 500° C.;

[0059] (4) Mix the precursor obtained in step (3) with potassium hydroxide, and activate it under an inert atmosphere for 2 hours, the mass ratio of the precursor potassium hydroxide is 1:3, and the activation temperature is 700°C;

[0060] (5) The mixture obtained in step (4) is centrifugally washed and dried to obtain a pomegranate-shaped porous carbon microsphere material.

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Abstract

The invention discloses a preparation method and application of a pomegranate-shaped porous carbon microsphere material, and relates to the technical field of nanometer materials and electrochemical devices. The synthesized polymer resin spheres are self-assembled into pomegranate-like microspheres under the promotion of capillary force through the spray drying process. After carbonization and activation in the later stage, pomegranate-like porous micron carbon spheres with high specific surface area are obtained, which have high energy density. Performance, greatly improved capacitance, in 6M KOH solution, 1A g ‑1 Under the current density, it can reach 382F g ‑1 mass specific capacity and 312F cm ‑3 volume ratio capacity. at up to 50A g ‑1 Under the current density, it can even be maintained at 298F g ‑1 The mass specific capacity and 228F cm ‑3 volume ratio capacity. The method is simple, efficient, and time-consuming, can effectively reduce production costs, and is suitable for large-scale production.

Description

technical field [0001] The invention relates to the technical field of nanometer materials and electrochemical devices, in particular to a preparation method and application of a pomegranate-shaped porous carbon microsphere material. Background technique [0002] Carbon spheres have been widely studied due to their good structural stability, regular geometric configuration, and simple production process. At present, 80% of commercial supercapacitors use carbon materials as electrode materials, and focus on nano-scale research and production, but the nano-effect leads to a particularly serious problem of material agglomeration, and the drastic drop in tap density caused by size reduction affects the specific capacity. And other problems directly restrict the application of carbon materials in supercapacitors. [0003] Chinese patent (application publication number CN107731557A), which discloses the preparation method and application of nitrogen-oxygen co-doped porous carbon ...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C01B32/348C01B32/318H01G11/44H01G11/86
CPCH01G11/44H01G11/86C01B32/318C01B32/348Y02E60/13
Inventor周亮冯世豪麦立强
OwnerWUHAN UNIV OF TECH