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Peanut bran-based supercapacitor electrode material and preparation method and application thereof

A technology for supercapacitors and electrode materials, applied in hybrid capacitor electrodes, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of unfriendly electrode material sources, unfavorable industrial production, and low specific capacitance, so as to improve electrochemical performance , easy access, and the effect of expanding the space between layers

Inactive Publication Date: 2020-09-18
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a supercapacitor electrode material based on peanut bran and its preparation method and application to solve the problems of low specific capacitance, poor reversibility and poor conductivity of carbon-based electrode materials in the prior art, environmental protection and the following problems: Green biomass carbon materials as raw materials for electrode materials are not widely sourced and expensive, which is not conducive to industrial production

Method used

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  • Peanut bran-based supercapacitor electrode material and preparation method and application thereof
  • Peanut bran-based supercapacitor electrode material and preparation method and application thereof
  • Peanut bran-based supercapacitor electrode material and preparation method and application thereof

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Effect test

Embodiment 1

[0037] 1. Rinse the peanut bran five times with distilled water, and dry it in an oven at 90°C for 24 hours.

[0038] 2. Crush the peanut bran into fine particles, pass through a 200-mesh sieve, place in a blast drying oven, and dry at 100°C for 24 hours to obtain peanut bran powder.

[0039] 3. Mix the above-mentioned peanut bran powder with KOH and urea at a mass ratio of 1:1:1, add distilled water and stir for 24 hours, and dry the mixture completely at 80°C.

[0040] 4. Using a tube furnace, the dried mixture was heat-treated at 800° C. for 2 h in an argon atmosphere with a heating rate of 4° C. / min, and cooled naturally to room temperature to obtain a black product.

[0041] 5. The product was washed with 1M HCl until no bubbles were generated, and then washed with distilled water until neutral pH=7. The cleaned sample was vacuum dried at 60° C. to obtain the target porous carbon material.

[0042] 6. Making electrodes: Grind the porous carbon material (active material)...

Embodiment 2

[0057] 1. Rinse the peanut bran with distilled water 8 times, put it in an oven and dry it at 110°C for 36 hours.

[0058] 2. Crush peanut bran into fine particles, pass through a 200-mesh sieve, place in a blast drying oven, and dry at 80°C for 24 hours to obtain peanut bran powder.

[0059] 3. Take the above-mentioned peanut bran powder sample and mix it with KOH and urea at a mass ratio of 1:1.5:1, add distilled water and stir for 24 hours, and dry the mixture completely at 80°C.

[0060] 4. Using a tube furnace, the dried sample was heat-treated at 800°C for 2 hours in an argon atmosphere, the heating rate was 4°C / min, and cooled naturally to room temperature to obtain a black product.

[0061] 5. The product was washed with 1M HCl until no bubbles were generated, and then washed with distilled water until neutral pH=7. The cleaned sample was vacuum dried at 60° C. to obtain the target porous carbon material.

Embodiment 3

[0063] 1. Rinse the peanut bran 7 times with distilled water, and dry it in an oven at 100°C for 36 hours.

[0064] 2. Crush peanut bran into fine particles, pass through a 200-mesh sieve, place in a forced air drying oven, and dry at 100°C for 36 hours to obtain peanut bran powder.

[0065] 3. Mix the above-mentioned peanut bran powder with KOH and urea at a mass ratio of 1:2:1, add distilled water and stir for 24 hours, and dry the mixture completely at 80°C.

[0066] 4. Using a tube furnace, the dried mixture was heat-treated at 800° C. for 2 h in an argon atmosphere with a heating rate of 4° C. / min, and cooled naturally to room temperature to obtain a black product.

[0067] 5. The product was washed with 1M HCl until no bubbles were generated, and then washed with distilled water until neutral pH=7. The cleaned sample was vacuum dried at 60° C. to obtain the target porous carbon material.

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Abstract

The invention discloses a peanut bran-based supercapacitor electrode material and a preparation method and application thereof, and belongs to the technical field of supercapacitors. The supercapacitor electrode material is prepared by taking peanut bran powder as a raw material and potassium hydroxide and urea as activators. The preparation method comprises the following steps: drying peanut bran, crushing to obtain peanut bran powder, mixing the peanut bran powder with KOH and urea according to a certain ratio, dehydrating, and carbonizing to obtain the biomass carbon material. The biomass carbon provided by the invention has rich pore channel structures and a high graphitization degree, and has the characteristics of high specific capacitance, reversibility and good conductivity when being used as an electrode material of a supercapacitor. Meanwhile, the source of raw materials is wide, the problem of energy shortage is solved, and the cost of the electrode material can be effectively reduced, and the preparation process is simple, safe to use and easy to control and scale.

Description

technical field [0001] The invention relates to the technical field of supercapacitors, in particular to a peanut bran-based supercapacitor electrode material and its preparation method and application. Background technique [0002] With the advancement of science and technology and the improvement of social civilization, energy issues have become the core of the social green and sustainable development strategy, which has greatly promoted the development of energy technology. Since the 21st century, the increasing shortage of energy and the serious deterioration of the environment have prompted people to continuously explore efficient and clean energy supply systems, and chemical energy storage has gradually become a global research hotspot. Among many chemical energy storage devices, supercapacitors have been widely used because of their safety, high efficiency and sustainable characteristics. An electric double layer supercapacitor consists of two polarized electrodes in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/348C01B32/342C01B32/324H01G11/44H01G11/34
CPCC01B32/348C01B32/342C01B32/324H01G11/44H01G11/34Y02E60/13
Inventor 樊新李良烁邓酩秦琳
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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