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Multi-stage porous carbon-based material based on reaction template, and preparation method and application thereof

A technology of carbon-based materials and hierarchical pores, which is applied in the fields of chemical instruments and methods, carbon compounds, hybrid/electric double-layer capacitors, etc., can solve the problems of difficult large-scale production, limitations in the preparation of porous carbon materials, and high preparation costs. Achieve the effect of improving the electron transmission rate, increasing the electron adsorption area, and facilitating large-scale production

Active Publication Date: 2019-11-19
BEIFANG UNIV OF NATITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Generally, the traditional template method, such as using silica and other materials as a sacrificial hard template, has problems such as single pore size, low micropore content, low purity of carbon material, complicated process, and high preparation cost, and the acid used to etch the template or Alkali is not only harmful to the human body but also pollutes the environment
However, carbon materials prepared by the commonly used KOH activation method have problems such as small pore size and low yield, and KOH is highly corrosive.
These shortcomings make the preparation of porous carbon materials very limited, and it is not easy to scale production

Method used

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  • Multi-stage porous carbon-based material based on reaction template, and preparation method and application thereof
  • Multi-stage porous carbon-based material based on reaction template, and preparation method and application thereof
  • Multi-stage porous carbon-based material based on reaction template, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] 1) First take 2g of glucose, 1g of basic zinc carbonate, and 1g of potassium carbonate and add them into an agate mortar for sufficient solid-phase mixing to obtain solid powder A;

[0044] 2) A obtained in step 1) was mixed in 200mL min -1 Under the protection of flowing inert gas, the temperature was raised to 750°C at 5°C / min and kept for 1.5h, then naturally cooled to room temperature and ground evenly to obtain catalyst precursor B;

[0045] 3) The catalyst precursor B obtained in step 2) was treated with an aqueous acid solution at room temperature for 20 h, then suction filtered and dried to obtain a carbon-based material from which the template and impurities were removed, labeled as HPC.

Embodiment 2

[0047] 1) Take 1g of disodium EDTA, 1g of basic magnesium carbonate, and 1g of potassium carbonate and add them into an agate mortar for sufficient solid-phase mixing to obtain solid powder A;

[0048] 2) A obtained in step 1) was mixed in 180mL min -1 Under the protection of flowing inert gas, the temperature was raised to 800°C at 7°C / min and kept for 1h, then naturally cooled to room temperature and ground evenly to obtain catalyst precursor B;

[0049] 3) Treat the catalyst precursor B obtained in step 2) with an aqueous acid solution at room temperature for 12 hours, and then perform suction filtration and drying to obtain a carbon-based material from which the template and impurities have been removed, which is marked as HPC;

Embodiment 3

[0051] 1) Take 2g of chitosan, 0.5g of basic nickel carbonate, and 2g of potassium carbonate and add them into an agate mortar for sufficient solid-phase mixing to obtain solid powder A;

[0052] 2) A obtained in step 1) was mixed in 250mL min -1 Under the protection of flowing inert gas, the temperature was raised to 1000°C at 4°C / min and kept for 1h, then naturally cooled to room temperature and ground evenly to obtain catalyst precursor B;

[0053] 3) Treat the catalyst precursor B obtained in step 2) with an aqueous acid solution at room temperature for 5 hours, and then perform suction filtration and drying to obtain a carbon-based material from which the template and impurities have been removed, which is marked as HPC;

[0054] 4) With the HPC obtained in step 3), in 180mL min -1 Flow reactive gas NH 3 Under protection, the temperature was raised to 900°C at 5°C / min and kept for 0.5h, and then naturally cooled to room temperature to obtain the further improved hierarc...

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Abstract

The invention specifically relates to a multi-stage porous carbon-based material based on a reaction template, and a preparation method and application thereof, belonging to the technical field of porous carbon-based materials. The multi-stage porous carbon-based material based on the reaction template mainly contains C and O elements and has a high degree of graphitization, a coral reef-like morphology, a three-dimensional pore structure, pore size distribution of 0.5 to 4.1 nm, a pore volume of 0.94 to 1.28 cm<3> / g, and a specific surface area of 900 to 2000 m<2> / g. The multi-stage pore carbon-based material is prepared from basic carbonate, a carbon precursor and carbonate under the protection of solid phase mixed-inert gas through carbonization, acid treatment and drying. The multi-stage porous carbon-based material based on the reaction template of invention has high specific capacitance, high rate performance and good cycle stability when used as a symmetrical supercapacitor electrode material, can achieve efficient and long-lasting charging and discharging in alkaline electrolyte, and has the advantages of low raw material cost, simple and easily-controllable preparation process, flexible process steps and easy large-scale production.

Description

technical field [0001] The invention belongs to the technical field of non-precious metal catalysts in electrocatalysis, and in particular relates to a hierarchical porous carbon-based material based on a reaction template and a preparation method thereof. Background technique [0002] Supercapacitors are also known as electrochemical capacitors. This new energy storage device not only has higher energy density than traditional capacitors, but also has higher power density than batteries, and its overall performance is between traditional electrolytic capacitors and batteries. Due to the unique energy storage method of supercapacitors, such as the ability to store and release a large amount in a short period of time, faster charge and discharge rates, and excellent cycle stability, it will have great potential in storing intermittent pulse energy such as solar energy and wind energy. The application prospect has been favored in recent years. Despite this, due to its low en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/348C01B32/342C01B32/318H01G11/34H01G11/26H01G11/24H01G11/86H01M4/88H01M4/96
CPCC01B32/318C01B32/342C01B32/348H01G11/24H01G11/26H01G11/34H01G11/86H01M4/8825H01M4/96Y02E60/13Y02E60/50
Inventor 严祥辉许皓梁祯薛同蒙紫薇房国丽李东沈宏芳
Owner BEIFANG UNIV OF NATITIES
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