Preparation method and application of biomass-based porous nitrogen-doped carbon material

A nitrogen-doped carbon and biomass technology, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of low energy density of supercapacitors, high cost of supercapacitors, and high preparation costs, and achieve cycle stability. The effect of long immersion, high rate capability, high energy density

Active Publication Date: 2020-12-15
NANJING FORESTRY UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention provides a preparation method of a biomass-based porous nitrogen-doped carbon material, which solves the problems of high preparation cost, complicated process and low yield; further provides a biomass-based porous nitrogen-doped carbon material used in a supercapacitor The application of supercapacitors solves the problems of high cost, non-environmental protection, and low energy density of supercapacitors

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  • Preparation method and application of biomass-based porous nitrogen-doped carbon material
  • Preparation method and application of biomass-based porous nitrogen-doped carbon material

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Embodiment 1

[0029] S1. Pretreatment of biomass raw materials: Wash the fresh Jinpan star anise seeds and soak them in a mixed solution of ethanol and water with a mass ratio of 1:2. After soaking for 1.5 hours, take out the Jinpan star anise seeds and immerse them in hydrochloric acid solution until the solution is dark and the surface of the seeds fades, then wash the seeds with deionized water until the seeds are soaked in deionized water for 2 hours and the aqueous solution test is neutral, then dry the seeds to obtain pretreated biomass raw materials.

[0030] S2. Prepare a mixed solution: mix the pretreated biomass raw material and melamine in step S1 to obtain a mixed solution; the mass ratio of the biomass raw material and melamine in the mixed solution is 1:5.

[0031] S3. Preparation of nitrogen-doped carbon material: adding the mixed solution in step S2 into an autoclave at 300° C. for 12 hours, and then drying for 12 hours to obtain nitrogen-doped carbon material.

[0032] S4....

Embodiment 2

[0034] S1. Pretreatment of biomass raw materials: Wash the fresh Jinpan star anise seeds and soak them in a mixed solution of ethanol and water with a mass ratio of 1:2. After soaking for 1 hour, take out the Jinpan star anise seeds and immerse them in hydrochloric acid solution, until the solution is dark and the surface of the seeds fades, then wash the seeds with deionized water, until the aqueous solution test is neutral after soaking the seeds in deionized water for 1.5 hours, then dry the seeds to obtain pretreated biomass raw materials.

[0035] S2. Prepare a mixed solution: mix the pretreated biomass raw material and melamine in step S1 to obtain a mixed solution; the mass ratio of the biomass raw material and melamine in the mixed solution is 1:4.

[0036]S3. Preparation of nitrogen-doped carbon material: adding the mixed liquid in step S2 into an autoclave at 300° C. for 12 hours, and then drying for 11 hours to obtain nitrogen-doped carbon material.

[0037] S4. Pr...

Embodiment 3

[0039] S1. Pretreatment of biomass raw materials: Wash the fresh Jinpan star anise seeds and soak them in a mixed solution of ethanol and water with a mass ratio of 1:2. After soaking for 2 hours, take out the Jinpan star anise seeds and then immerse them in hydrochloric acid solution until the solution is dark and the surface of the seeds fades, then wash the seeds with deionized water until the seeds are soaked in deionized water for 2 hours and then the aqueous solution test is neutral, then dry the seeds to obtain a pretreated biomass raw material .

[0040] S2. Prepare a mixed solution: mix the pretreated biomass raw material and melamine in step S1 to obtain a mixed solution; the mass ratio of the biomass raw material and urea in the mixed solution is 1:1.

[0041] S3. Preparation of nitrogen-doped carbon material: adding the mixed liquid in step S2 into an autoclave at 300° C. for 12 hours, and then drying for 10 hours to obtain nitrogen-doped carbon material.

[0042]...

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Abstract

The invention discloses a preparation method of a biomass-based porous nitrogen-doped carbon material, which comprises the following steps: carrying out hydrothermal reaction and high-temperature activation on a biomass raw material, a nitrogen source chemical substance and an activator according to a certain mass ratio to obtain the biomass-based porous nitrogen-doped carbon material, and has theadvantages of simple preparation technique and high operability. The porous nitrogen-doped carbon material with high energy density, high rate capability and long cycle life can be obtained. The biomass raw material is Fatsia japonica seeds, the pretreatment process is simple, the cost is effectively reduced, the yield is improved, and the method is green and sustainable. The invention further discloses application of the biomass-based porous nitrogen-doped carbon material to preparation of an electrode in a super capacitor, and the specific capacitance and cycle life of the super capacitor electrode material are effectively improved.

Description

technical field [0001] The invention belongs to the technical field of carbon materials, and in particular relates to a preparation method and application of a biomass-based porous nitrogen-doped carbon material. Background technique [0002] Porous carbon materials have the characteristics of high specific surface area, adjustable porosity and pore size, good electrical conductivity, and surface modification. Compared with traditional carbon materials, porous carbon materials prepared from biomass have the advantages of abundant resources, lower cost and surface modification. [0003] At present, many researchers use different biomass raw materials (such as cellulose, lignin, fruit shell, animal hair, etc.), different nitrogen source materials for doping, and use different techniques to prepare porous nitrogen-doped carbon materials. . Different biomass materials and nitrogen source materials, as well as the adoption of different process technologies will affect the yield...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/318C01B32/348H01G11/34H01G11/26H01G11/44
CPCC01B32/348C01B32/318H01G11/34H01G11/26H01G11/44Y02E60/13
Inventor 蒋少华李慧玲段改改魏蕊寒
Owner NANJING FORESTRY UNIV
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