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Preparation method and application of graphene-like structure carbon electrode material

A graphene and carbon electrode technology, which is applied in the preparation/purification of carbon, hybrid capacitor electrodes, etc., can solve the problems of difficult conversion of results, and achieve the effects of low cost, large specific surface, and good graded pore distribution.

Active Publication Date: 2020-03-20
RES INST OF XIAN JIAOTONG UNIV & SUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to many problems in the current graphene preparation process, it is difficult to convert graphene laboratory results into actual products.

Method used

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  • Preparation method and application of graphene-like structure carbon electrode material
  • Preparation method and application of graphene-like structure carbon electrode material
  • Preparation method and application of graphene-like structure carbon electrode material

Examples

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Effect test

Embodiment 1

[0038] A method for preparing a graphene-like structure carbon electrode material using biomass rice husks as a raw material, comprising the following steps:

[0039] Step 1: drying the rice hulls at 60°C.

[0040] Step 2: Stir and mix the dried rice hulls in an aqueous solution of nickel nitrate evenly, soak them in it for 12 hours and then bake them at 60°C for 24 hours. At this time, there is no obvious moisture on the surface of the rice hulls; the mass of nickel nitrate is the mass of dried rice hulls 5%.

[0041] Step 3: Put the substance treated in Step 2 in a tube furnace, raise the temperature to 700° C. for 1 hour at a rate of 10° C. / min in a nitrogen atmosphere, carry out carbonization and catalysis, and obtain a preliminary carbonized product.

[0042]Step 4: soak and stir the preliminary carbonized product in Step 3 in 1 mol / L nitric acid solution for 24 hours, filter with suction, wash with water, and dry at 80° C. for 12 hours to obtain the carbonized product. ...

Embodiment 2

[0051] A method for preparing a graphene-like structure carbon electrode material using biomass rice husks as a raw material, comprising the following steps:

[0052] Step 1: drying the rice hulls at 70°C.

[0053] Step 2: Stir and mix the dried rice husks in an aqueous solution of nickel chloride evenly, soak them for 12 hours and then bake them at 55°C for 36 hours. At this time, there is no obvious moisture on the surface of the rice husks; 5% of shell mass.

[0054] Step 3: Put the substance treated in Step 2 in a tube furnace, raise the temperature to 650°C at a heating rate of 8°C / min in a nitrogen atmosphere and keep it for 1.5h for carbonization and catalysis to obtain a preliminary carbonized product.

[0055] Step 4: soak and stir the preliminary carbonized product in step 3 in 0.5 mol / L hydrochloric acid solution for 24 hours, suction filter, wash with water, and dry at 100° C. for 12 hours to obtain the carbonized product.

[0056] Step 5: Mix and stir the carbon...

Embodiment 3

[0060] A method for preparing a graphene-like structure carbon electrode material using biomass rice husks as a raw material, comprising the following steps:

[0061] Step 1: drying the rice husks at 80°C.

[0062] Step 2: Stir and mix the dried rice husks in an aqueous solution of nickel nitrate evenly, soak them in it for 12 hours and then bake them at 65°C for 24 hours. At this time, there is no obvious moisture on the surface of the rice husks; the mass of nickel nitrate is the mass of dried rice husks 5%.

[0063] Step 3: Put the substance treated in Step 2 in a tube furnace, raise the temperature to 750°C at a heating rate of 5°C / min in a nitrogen atmosphere and keep it for 1.5h for carbonization and catalysis to obtain a preliminary carbonized product.

[0064] Step 4: soak and stir the preliminary carbonized product in step 3 in 5 mol / L nitric acid solution for 24 hours, suction filter, wash with water, and dry at 120°C for 12 hours to obtain the carbonized product. ...

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Abstract

The invention relates to a preparation method of a graphene-like structured carbon electrode material. The method comprises the following steps: immersing dried shell biomasses in an aqueous solution of a nickel salt, and drying the shell biomasses I; charring the shell biomasses in an inert atmosphere at 650-750 DEG C, immersing the charred shell biomasses in an aqueous solution of an acid, and filtering the obtained product to obtain a charred product; and immersing the charred product in an aqueous solution of an alkali, drying the obtained charred product, activating the dried charred product in an inert atmosphere at 650-750 DEG C, and cooling and washing the activated charred product until the product is neutral in order to obtain the graphene-like structured carbon electrode material. The invention also discloses an application of the graphene-like structured carbon electrode material, prepared through the method, as a capacitor. Raw materials are economical and can be easily obtained, and are processed through a simple catalytic activation technology to prepare the graphene-like structured carbon electrode material; and a research direction is provided for the large-scale production of carbon electrode supercapacitors from the shell biomasses.

Description

technical field [0001] The invention relates to the field of new energy materials, in particular to a preparation method and application of a graphene-like structure carbon electrode material. Background technique [0002] The development of new green energy such as solar energy, wind energy, and tidal energy has brought new opportunities for the improvement of traditional energy crises and environmental problems. However, limited by the regional limitations and discontinuity of new energy sources, the development of high-performance energy storage devices has become a current research hotspot. According to different energy storage mechanisms and application fields, energy storage devices can be roughly divided into secondary batteries, fuel cells, and supercapacitors. In recent years, due to the outstanding power performance, long cycle life, safety, and environmental friendliness of supercapacitors, it not only fills the gap between ordinary secondary batteries and tradit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/05H01G11/44H01G11/24H01G11/34
CPCC01P2002/72C01P2002/82C01P2004/04C01P2004/30C01P2006/40H01G11/24H01G11/34H01G11/44Y02E60/13
Inventor 吴世超金宏徐慧王小兰胡景鹏
Owner RES INST OF XIAN JIAOTONG UNIV & SUZHOU
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