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

A technology of graphene and carbon electrodes, which is applied in the direction of carbon preparation/purification, hybrid capacitor electrodes, etc., can solve the problems of difficult conversion of achievements, and achieve the effects of low cost, abundant raw materials, and good hierarchical pore distribution

Active Publication Date: 2017-10-13
RES INST OF XIAN JIAOTONG UNIV & SUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to many problems in the current graphene preparation process,

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

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

[0039] Step 1: Dry the rice husks at 60°C.

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

[0041] Step 3: Put the treated material in step 2 in a tube furnace, heat it up to 700°C at a temperature increase rate of 10°C / min in a nitrogen atmosphere for 1 hour, perform carbonization and catalysis, to obtain a preliminary carbonized product.

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

[0043] Step 5: Mi...

Embodiment 2

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

[0052] Step 1: Dry the rice husks at 70°C.

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

[0054] Step 3: Put the processed material in step 2 in a tube furnace, heat it up to 650°C at a heating rate of 8°C / min in a nitrogen atmosphere and hold for 1.5h, perform carbonization and catalysis, to obtain a preliminary carbonized product.

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

[0056]...

Embodiment 3

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

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

[0062] Step 2: Stir and mix the dried rice husk in an aqueous solution of nickel nitrate, soak in it for 12 hours and bake it at 65°C for 24 hours. At this time, the surface of the rice husk has no obvious moisture; the quality of nickel nitrate is the quality of the dried rice husk Of 5%.

[0063] Step 3: Put the processed material in step 2 in a tube furnace, heat it up to 750°C at a heating rate of 5°C / min in a nitrogen atmosphere, and hold for 1.5h, perform carbonization and catalysis, to obtain a preliminary carbonized product.

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

[0065] Step 5: Mix the carbo...

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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 brings new opportunities for the traditional energy crisis and the improvement of environmental problems. However, limited by the regional limitations and discontinuities of new energy sources, the development of high-performance energy storage devices has become a current research focus. 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 performance of supercapacitors such as outstanding power performance, long cycle life safety, and environmental friendliness, it not only fills the gap between ordinary secon...

Claims

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Application Information

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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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