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Preparation method of biomass charcoal-based supercapacitor electrode material

A technology for supercapacitors and electrode materials, applied in hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, chemical instruments and methods, etc., to achieve the effects of controllable pore structure, simple preparation process, and narrow pore size distribution

Active Publication Date: 2021-08-03
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, there are few literature reports on the co-carbonization of biomass carbon materials and small molecular sugars to control the pore structure and surface structure of materials, and to apply them to the performance research of electrochemical capacitors.

Method used

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  • Preparation method of biomass charcoal-based supercapacitor electrode material
  • Preparation method of biomass charcoal-based supercapacitor electrode material
  • Preparation method of biomass charcoal-based supercapacitor electrode material

Examples

Experimental program
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Effect test

Embodiment 1

[0036] The walnut shells were dried and crushed, washed several times with deionized water and 1 mol / L hydrochloric acid, and dried. A proper amount of walnut shells were put into a quartz boat, placed in a tube furnace, and carbonized in a nitrogen atmosphere. The heating rate was raised to 300 °C at a rate of 3 °C / min, and the carbonization time was 90 min to obtain carbonized walnut shells.

[0037] KOH and carbonized walnut shells were mixed according to the alkali-carbon mass ratio of 2:1, a small amount of water was added dropwise during the grinding process, and the mixture was uniformly placed in a drying oven at 70 °C for drying. The mixture was put into a quartz boat and activated in a tube furnace under the protection of nitrogen. The heating rate was raised to 600 °C at a rate of 3 °C / min, activated for 1 h, and then cooled to room temperature at a rate of 2 °C / min. mol / L hydrochloric acid solution, suction filtration, and distilled water suction filtration washing...

Embodiment 2

[0041] The melon seed shells were washed several times with deionized water and 1 mol / L hydrochloric acid, and dried. Put an appropriate amount of melon seed shells in a quartz boat, place them in a tube furnace, and carbonize them in a nitrogen atmosphere. The heating rate is raised to 350 °C at a rate of 5 °C / min, and the carbonization time is 100 min to obtain carbides.

[0042] Mix KOH and carbonized melon seed shells according to the mass ratio of alkali to carbon of 3:1, add a small amount of water dropwise during the grinding process, mix well and place them in a drying oven at 80 °C for drying. Put the mixture into a quartz boat and activate it in a tube furnace under the protection of nitrogen. The heating rate was raised to 600 °C at a rate of 3 °C / min, activated for 90 min, and then cooled to room temperature at a rate of 5 °C / min. mol / L hydrochloric acid solution, suction filtration, and distilled water suction filtration washing, after washing to neutrality, dryin...

Embodiment 3

[0046] Rhizobia were washed several times with deionized water and 1 mol / L hydrochloric acid, and dried. Put an appropriate amount of rhizobia into a quartz boat, place them in a tube furnace, and carbonize them under a nitrogen atmosphere. The heating rate was raised to 350 °C at a rate of 1 °C / min, and the carbonization time was 120 min to obtain carbonized rhizobia.

[0047] Mix KOH and carbonizing rhizobia according to the mass ratio of alkali to carbon at 2:1, add a small amount of water dropwise during the grinding process, mix well, and then place them in a drying oven at 70 °C for drying. Put the mixture into a quartz boat and activate it in a tube furnace under the protection of nitrogen. The heating rate was raised to 700 °C at a rate of 3 °C / min, activated for 60 min, and then cooled to room temperature at a rate of 6 °C / min. mol / L hydrochloric acid solution, suction filtration, and distilled water suction filtration washing, after washing to neutrality, drying to o...

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Abstract

The invention discloses a preparation method of a biomass charcoal-based supercapacitor electrode material, and relates to a preparation method of an electrode material. According to the method, biomass composite porous carbon is used as a capacitor electrode material, a biomass material is used as a carbon source, and porous carbon is prepared through carbonization and activation; and the biomass composite porous carbon electrode material with a controllable structure is prepared through modification and carbonization of micromolecular sugar. The biomass co-carbonization composite porous carbon material has the advantages of controllable pore structure, narrow pore size distribution, obviously improved pore specific surface area, stable electrical property and the like. The prepared biomass composite carbon-based activated carbon has rich and adjustable pore structures, shows excellent electrochemical performance, has good charge-discharge performance, cycling stability and capacity retention rate when being used as a capacitor electrode material, and has wide application value in the aspects of commercial supercapacitors and the like.

Description

technical field [0001] The invention relates to a method for preparing an electrode material, in particular to a method for preparing an electrode material for a biomass carbon-based supercapacitor. Background technique [0002] With the continuous acceleration of the global industrialization process, the world's population continues to grow, and traditional fossil energy is irreversibly consumed, which has brought about serious environmental pollution problems. Global warming, sea level rise and other problems are becoming more serious year by year. It is urgent to find alternative solutions. Alternative renewable energy. The emergence of environmentally friendly energy sources such as wind energy, solar energy, nuclear energy, and biomass energy has brought good news to global energy problems, but the supply of energy is limited by the natural environment, so clean renewable energy and portable energy storage devices are developed to solve The current energy issue is a to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/324C01B32/318C01B32/348C01B32/354C01B32/00H01G11/34H01G11/24H01G11/86
CPCC01B32/324C01B32/318C01B32/348C01B32/354C01B32/00H01G11/34H01G11/24H01G11/86Y02E60/13
Inventor 苏畅孙曼徐立环
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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