A kind of pine-based biomass activated carbon and its preparation method and application in electrochemical energy storage

A biomass and activated carbon technology, applied in the direction of inorganic chemistry, chemical instruments and methods, carbon compounds, etc., can solve problems such as narrow layer spacing, difficulty in meeting the application requirements of sodium-ion battery anode materials, and slow mass transfer rate of biomass activated carbon. Achieve the effect of wide layer spacing, high economic value and benefit, and short cycle

Active Publication Date: 2020-08-28
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mass transfer rate of biomass activated carbon prepared by the existing method is slow and the interlayer distance is narrow, which is difficult to meet the application requirements of the anode material of sodium ion battery.

Method used

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  • A kind of pine-based biomass activated carbon and its preparation method and application in electrochemical energy storage
  • A kind of pine-based biomass activated carbon and its preparation method and application in electrochemical energy storage
  • A kind of pine-based biomass activated carbon and its preparation method and application in electrochemical energy storage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Activated carbon preparation:

[0034] (1) Carbon source preparation: select pine trees in Yuelu Mountain in Changsha, Hunan Province as the carbon source of the precursor, peel off the bark, take the main woody part, wash it with distilled water three times, dry it in an oven at 120°C for 24 hours, and then crush it. Sieve out 40-80 mesh pine powder.

[0035] (2) Hydrothermal treatment: Weigh 1g of NaOH in 80mL of water, transfer it to a 100mL reactor, take 1g of the carbon source in (1) in the reactor, seal it, and place it in a blast drying oven at 200°C for water Heat 6h. Hydrothermal finish, cooling, drying in blast drying box, obtains solid mixture, the scanning electron microscope of the pine tree powder before and after hydrothermal treatment is as follows: figure 1 As shown, it can be observed that the pore structure on the surface of pine powder after hydrothermal treatment is more and more uniform, indicating that the hydrothermal process has an important i...

Embodiment 2

[0052] Activated carbon preparation:

[0053] (1) Carbon source preparation: select pine trees in Yuelu Mountain in Changsha, Hunan Province as the carbon source of the precursor, peel off the bark, take the main woody part, wash it with distilled water three times, dry it in an oven at 120°C for 24 hours, and then crush it. Sieve out 40-80 mesh pine powder.

[0054] (2) Hydrothermal treatment: weigh 4g ZnCl 2 Transfer 80mL of water to a 100mL reaction kettle, take 1g of the carbon source in (1) in the reaction kettle, seal it, and place it in a forced air drying oven at 240°C for 10h. After hydrothermal completion, cool and dry in a blast drying box to obtain a solid mixture.

[0055] (3) Carbonization: take the mixed solid obtained in (2), and in an argon atmosphere, raise the temperature to 1000°C at 10°C / min, keep it warm for 1.5h, and after cooling to room temperature, the product is washed successively with concentrated hydrochloric acid and secondary water to Neutra...

Embodiment 3

[0062] Activated carbon preparation:

[0063] (1) Carbon source preparation: select pine trees in Yuelu Mountain in Changsha, Hunan Province as the carbon source of the precursor, peel off the bark, take the main woody part, wash it with distilled water three times, dry it in an oven at 120°C for 24 hours, and then crush it. Sieve out 40-80 mesh pine powder.

[0064] (2) Hydrothermal treatment: weigh 2g K 2 CO 3 Transfer 80mL of water to a 100mL reaction kettle, take 1g of the carbon source in (1) in the reaction kettle, seal it, and place it in a forced air drying oven at 180°C for 6 hours. After hydrothermal completion, cool and dry in a blast drying box to obtain a solid mixture.

[0065] (3) Carbonization: take the mixed solid obtained in (2), and in an argon atmosphere, heat up to 1200°C at 10°C / min, keep it warm for 1.5h, and after cooling to room temperature, the product is washed with concentrated hydrochloric acid and secondary water to Neutral, then filtered and...

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Abstract

The invention discloses pine-based biomass activated carbon, a method for preparing the same and application of the pine-based biomass activated carbon to electrochemical storage devices. The method includes placing pine raw material powder, activators and water in high-pressure reaction kettles and carrying out hydrothermal reaction; carrying out drying and heat treatment on products obtained inthe hydrothermal reaction to obtain the pine-based biomass activated carbon. The pine-based biomass activated carbon, the method and the application have the advantages that activated carbon materialsprepared by the aid of the method have uniform ordered porous structures and large specific surface areas and are high in mass transfer velocity, and sodium-ion batteries with high energy density andgood cycle performance or high-capacity capacitors can be obtained if the activated carbon materials are used for preparing negative electrode materials for the sodium-ion batteries or electrode materials for the double-electric-layer capacitors; the pine-based biomass activated carbon is low in preparation cost, easy to operate and short in production cycle and can be effectively scaled up, andthe industrial production requirements can be met.

Description

technical field [0001] The invention relates to a pine-based biomass activated carbon, in particular to a method for preparing porous activated carbon with a high specific surface and containing micro-mesopores by using the pine wood fiber part as a direct raw material through hydrothermal reaction combined with high-temperature carbonization, and also relates to a pine-based biomass The application of activated carbon in the field of electrochemical energy storage belongs to the field of materials and new energy technology. Background technique [0002] Activated carbon has attracted much attention due to its high specific surface area, low cost, adjustable pore structure, good electrical conductivity, electrochemical stability and thermal stability, and is widely used in energy storage, food fading, catalyst carrier, sewage treatment and harmful gas adsorption etc. At present, the raw materials for the preparation of activated carbon are mainly low-cost biomass raw materi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/324C01B32/348H01G11/44H01G11/24H01G11/34
CPCC01B32/324C01B32/348H01G11/24H01G11/34H01G11/44Y02E60/13
Inventor 纪效波邹国强侯红帅
Owner CENT SOUTH UNIV
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