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Preparation method of nitrogen-doped porous biochar and method for preparing electrode material

A biological carbon and nitrogen doping technology, applied in chemical instruments and methods, hybrid capacitor electrodes, carbon compounds, etc., can solve the problems of complex preparation process and high cost, achieve simple preparation process, high energy density, and improve buffer storage. Effect

Pending Publication Date: 2022-03-22
JIANGSU TAIHU BOILER
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  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problems of complex preparation process and high cost of the existing nitrogen-doped porous carbon, the present invention provides a preparation method of nitrogen-doped porous carbon, which can simplify the preparation process and reduce the cost. At the same time, the present invention also provides A method for making electrode materials using the nitrogen-doped porous biocarbon

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  • Preparation method of nitrogen-doped porous biochar and method for preparing electrode material
  • Preparation method of nitrogen-doped porous biochar and method for preparing electrode material
  • Preparation method of nitrogen-doped porous biochar and method for preparing electrode material

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preparation example Construction

[0024] A method for preparing nitrogen-doped porous biochar, comprising the following steps:

[0025] (1) Raw material pretreatment: The terrestrial biomass and algae biomass are mixed and pretreated according to the mass ratio of 1:0.2~1:5. Both the terrestrial biomass and the algal biomass are in the form of dry powder. The terrestrial biomass includes reeds and reed flowers. , bagasse, taro stalk, catkins, algal biomass including kelp, Enteromorpha, Sargassum, laver, hijiki and other large seaweeds and chlorella, Scenedesmus obliques, spirulina, For microalgae such as cyanobacteria, the mixing methods include dry mixing method and hydrothermal method; the dry mixing method is to put a certain proportion of terrestrial biomass and algal biomass into a mortar or ball mill for full grinding, so that the terrestrial biomass and algal biomass fully contact , to obtain pretreated raw materials; the hydrothermal method is to put a certain proportion of the mixture of terrestrial b...

Embodiment 1

[0031] Preparation of nitrogen-doped porous biochar:

[0032] (1) Raw material pretreatment: Grind and mix 1g of bagasse and 0.5g of Scenedesmus obliquus evenly;

[0033] (2) Add activator: Grind the pretreated raw material and potassium hydroxide according to the mass ratio of 1:1 to mix them evenly;

[0034] (3) Carbonization and pickling: put the mixture in step (2) in a tube furnace, raise the temperature to 700°C at a rate of 3°C / min in an argon atmosphere, keep it warm for 1h, and then cool it naturally to room temperature , to obtain nitrogen-doped porous carbon; then put the obtained nitrogen-doped porous carbon into 200ml of 1mol / L hydrochloric acid solution, stir at room temperature for 24h; finally, wash the nitrogen-doped porous carbon with deionized water Wash until neutral, and dry in an oven at 105° C. for 24 hours to obtain a nitrogen-containing porous carbon material for supercapacitors.

[0035] Preparation of electrode materials in the three-electrode test...

Embodiment 2

[0039] Preparation of nitrogen-doped porous biochar:

[0040] (1) Raw material pretreatment: Grind and mix 1g reed powder and 1.2g chlorella evenly;

[0041] (2) Add activator: Grind the pretreated raw material and potassium bicarbonate according to the mass ratio of 1:4 to mix them evenly;

[0042] (3) Carbonization and pickling: put the mixture in step (2) in a tube furnace, raise the temperature to 800°C at a rate of 5°C / min under an argon atmosphere, keep it warm for 2 hours, and then cool to room temperature; Put the sample obtained above into 150ml of 2mol / L hydrochloric acid solution, stir at room temperature for 24h; finally, wash the acid-washed material to neutrality, and dry it in an oven at 105°C for 24h to obtain a nitrogen-containing porous carbon material.

[0043] Preparation of electrode materials in the three-electrode test system:

[0044] Put 0.003g of nitrogen-doped porous biochar into a centrifuge tube, add 1ml of absolute ethanol, put it into the ultr...

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Abstract

The invention relates to the technical field of capacitor electrode production, in particular to a preparation method of nitrogen-doped porous biochar and a method for preparing an electrode material, and the method comprises the following steps: (1) raw material pretreatment: mixing and pretreating algae biomass and terrestrial biomass; (2) adding an activating agent: mixing the pretreated raw materials with the activating agent; and (3) carbonizing and pickling: carbonizing the mixture obtained in the step (2) under the protection of inert gas, pickling the obtained biochar until the biochar is neutral after the reaction is finished, and drying to obtain the nitrogen-doped porous biochar.

Description

technical field [0001] The invention relates to the technical field of capacitor electrode production, in particular to a method for preparing nitrogen-doped porous bio-carbon and a method for making electrode materials. Background technique [0002] With the development and utilization of new energy technology, the problem of energy storage has gradually attracted people's attention. The development of new energy storage devices can solve the problem of energy instability, so that energy can be output in an efficient and stable form, so as to meet people's growing needs. increasing energy demand. As a new type of energy storage components, supercapacitors have been paid close attention to by researchers. Biomass-derived carbon material (hereinafter referred to as biochar) is a carbon material with a unique pore structure, which has the advantages of developed pore structure, large specific surface area, good electrical conductivity, high temperature resistance, and corrosi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/348C01B32/324H01G11/30H01G11/32H01G11/86
CPCC01B32/348C01B32/324H01G11/30H01G11/32H01G11/86Y02E60/13
Inventor 钟珊袁川王爽罗晖
Owner JIANGSU TAIHU BOILER
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