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Method for preparing supercapacitor carbon material by adopting bio-oil

A technology for supercapacitors and bio-oils, applied in hybrid capacitor electrodes, carbon preparation/purification, etc., can solve the problems of underdeveloped mesoporous and macroporous structures, poor rate performance, uneven pore size distribution, etc., and achieve excellent electrochemical performance. , the effect of efficient conversion, excellent rate performance

Pending Publication Date: 2019-07-19
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology allows for creating tiny holes on regular meshes made from various types of organic matter such as wood or coal by burning them under controlled conditions at very low temperatures without causing damage. These small openings allow gas molecules (oxygen) to pass through while keeping other substances out. By controllably reducing pressure during heat treatment, this process makes it possible to produce highly specialized pores that are even smaller than traditional methods used for making charcoal. Additionally, these new techniques have potential applications in energy storage devices like batteries due their ability to store large amounts of electrical power efficiently compared to existing battery technologies.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving the properties or quality of activated charcoal made with natural sources like bamboo roots while also addressing issues associated with unconventional methods that use expensive starting materials (such as sorghum).

Method used

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  • Method for preparing supercapacitor carbon material by adopting bio-oil
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  • Method for preparing supercapacitor carbon material by adopting bio-oil

Examples

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Embodiment 1

[0023] The bio-oil of this embodiment prepares supercapacitor carbon material BHPC 1∶1 The preparation process is as follows:

[0024] (1) Preparation of bio-oil: take 300g of dry pine molding particles and place them in a large fixed bed. 2 The pine wood was pyrolyzed under the atmosphere, and the condensable gas produced was condensed by condensed water at 0°C to obtain bio-oil with a mass yield of about 41.67%. Among them, the pyrolysis conditions are as follows: heating rate is 16°C / min, pyrolysis temperature is 500°C, holding time is 1h, N 2 The flow rate was 400 mL / min.

[0025] (2) Preparation of bio-oil and template mixture: Weigh 10 g of bio-oil obtained in step (1), dissolve it in 20 g of ethanol solution, and weigh 10 g of magnesium acetate tetrahydrate template and mix it with bio-oil ethanol solution, and the overall temperature is 105°C After magnetically stirring for 6 hours in an oil bath, take it out, cool to room temperature, and obtain a mixture of bio-oi...

Embodiment 2

[0029] The bio-oil of this embodiment prepares supercapacitor carbon material BHPC 2∶1 The specific preparation process is as follows:

[0030] (1) Preparation of bio-oil: implement according to the same method as step (1) in Example 1.

[0031] (2) Preparation of bio-oil and templating agent mixture: implement according to the same method as step (2) in Example 1. The difference is that the dosage of magnesium acetate tetrahydrate template is 20g, and the resulting bio-oil-based porous carbon is marked as BHPC 2∶1 .

[0032] (3) Preparation of supercapacitor carbon material from bio-oil: implement in the same manner as step (3) in Example 1.

[0033] (4) Electrochemical performance test of bio-oil-based porous carbon: the same method as step (4) in Example 1 was implemented. The resulting BHPC 2∶1 The electrode material is in 6M KOH electrolyte, at a current density of 0.5A / g, its specific capacitance is 344F / g, and at a current density of 50A / g, its specific capacitance...

Embodiment 3

[0035] The bio-oil of this embodiment prepares supercapacitor carbon material BHPC 3∶1 The specific preparation process is as follows:

[0036] (1) Preparation of bio-oil: implement according to the same method as step (1) in Example 1.

[0037] (2) Preparation of bio-oil and templating agent mixture: implement according to the same method as step (2) in Example 1. The difference is that the dosage of magnesium acetate tetrahydrate template is 30g, and the obtained bio-oil-based porous carbon is marked as BHPC 3∶1 .

[0038] (3) Preparation of supercapacitor carbon material from bio-oil: implement in the same manner as step (3) in Example 1.

[0039] (4) Electrochemical performance test of bio-oil-based porous carbon: the same method as step (4) in Example 1 was implemented. The resulting BHPC 3∶1 The electrode material is in 6M KOH electrolyte, and its specific capacitance is 207F / g at a current density of 0.5A / g, and its specific capacitance is 182F / g at a current densi...

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Abstract

The invention discloses a method for preparing a supercapacitor carbon material by adopting bio-oil, which comprises the following steps: firstly, preparing a mixture of the bio-oil and a template agent by using the bio-oil as a carbon precursor and magnesium acetate tetrahydrate as the template agent; carrying out high-temperature carbonization on the mixture in an inert gas atmosphere to obtaina carbonized product MgO/C, and carrying out acid pickling on the carbonized product MgO/C; and finally, carrying out suction filtration, washing with deionized water and drying to obtain the bio-oil-based porous carbon. Compared with the activation method for preparing the biomass-based porous carbon, the method has the advantages that the morphology, the structure and the pore size distributionof the porous carbon can be more easily and accurately regulated and controlled, and the product has higher specific capacitance and excellent rate capability. 6M KOH is used as an electrolyte, and the specific capacitance reaches up to 344F/g under the current density of 0.5 A/g. When the current density is 50A/g, the specific capacitance is kept at 182F/g.

Description

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Claims

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Application Information

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Owner SOUTHEAST UNIV
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