Preparation method and application of biomass graphitized porous carbon material

A technology for porous carbon materials and biomass materials, which is applied in the field of preparation of biomass graphitized porous carbon materials, can solve problems such as damage and corrosive environment of production equipment, and achieve the effects of low cost, shortened production cycle and abundant sources.

Inactive Publication Date: 2017-10-20
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the above-mentioned activators and catalysts are highly corrosive or toxic

Method used

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  • Preparation method and application of biomass graphitized porous carbon material
  • Preparation method and application of biomass graphitized porous carbon material
  • Preparation method and application of biomass graphitized porous carbon material

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Take some fresh bamboo poles, chop them up, wash them, dry them, and then transfer them to a tube furnace for carbonization at 400°C for 2 hours under the protection of argon to obtain carbonized bamboo materials; 0.60g of carbonized materials, 0.99 g potassium ferrate (K 2 FeO 4 ) and 45ml of water were uniformly mixed, and then dried; the above mixture was transferred to a tube furnace for heat treatment, and kept at 800°C for 2 hours under the protection of argon; Substance graphitized porous carbon material.

[0036] The above biomass graphitized porous carbon material was observed by scanning electron microscope (SEM), and its morphology is as follows: figure 1 shown. Depend on figure 1 It can be seen that the prepared biomass graphitized porous carbon material has an obvious three-dimensional porous structure. Specific surface area test is carried out to described biomass graphitized porous carbon material, obtain the N of this material 2 Adsorption-desorpti...

Embodiment 2

[0038] Take some fresh bamboo poles, chop them up, wash them, dry them, and transfer them to a tube furnace for carbonization at 500°C for 1 hour under the protection of argon to obtain carbonized bamboo materials; 0.60 g of carbonized materials, 0.99 g potassium ferrate (K 2 FeO 4 ) and 45ml of water were uniformly mixed, and then dried; the above mixture was transferred to a tube furnace for heat treatment, and kept at 1000°C for 1 hour under the protection of argon; Substance graphitized porous carbon material.

[0039] Weigh the biomass graphitized porous carbon material, acetylene black and polyvinylidene fluoride (PVDF) with a mass ratio of 8:1:1, transfer it to a mortar, add a small amount of N-methylpyrrolidone (N -Methylpyrrolidone, NMP) as a solvent, fully ground to a paste, and the mixture was coated on a nickel foam sheet with a size of 2 mm * 1 mm, then vacuum-dried at 120°C for 12 hours, and finally pressed at a pressure of 10Mpa for 1 Minutes to get supercapa...

Embodiment 3

[0042] Take the discarded corn stalks, chop them up, wash them, dry them, and transfer them to a tube furnace for carbonization at 400°C for 4 hours under the protection of nitrogen to obtain carbonized materials of corn stalks; 0.60 g of carbonized materials, 6.0 g potassium ferrate (K 2 FeO 4 ) and 50ml of water were uniformly mixed, and then dried; the above mixture was transferred to a tube furnace for heat treatment, and kept at 1500°C for 6 hours under the protection of argon; Substance graphitized porous carbon material. The carbon electrode prepared from the biomass graphitized porous carbon material obtained in this example was selected as the working electrode, and a constant current charge and discharge test was performed to calculate the capacitance at different current densities. The electrode had a capacitance of 163.2 F / g at a current density of 0.5 A / g.

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Abstract

The invention provides a preparation method and an application of a biomass graphitized porous carbon material, and belongs to the technical fields of preparation of carbon materials and utilization of biological resources. The method comprises the following steps: carbonizing plants used as a carbon source, and fully mixing the carbonized plants with a pore forming agent/catalyst and a solvent to obtain a mixture; and drying the mixture, and carrying out high-temperature heat treatment on the dried mixture in an inert gas atmosphere to finally obtain the graphitized porous carbon material. Renewable biomass is used as the carbon source, the intrinsic microstructure of the biomass is reserved, and the porous form formation and the graphitization of the carbon material are simultaneously completed through a one-step technology, so the preparation method has the advantages of low cost, non-toxicity, greenness, environmental protection, good safety, high efficiency, and realization of large-scale production; and the biomass graphitized porous carbon material has the advantages of large specific surface area and high graphitization degree, and is suitable for being applied to the energy storage field as an electrode material.

Description

technical field [0001] The invention belongs to the technical field of porous carbon materials and utilization of biological resources, and in particular relates to a preparation method of biomass graphitized porous carbon materials and its application in the field of energy. Background technique [0002] With the development of human society and the rapid increase of population, the demand for consumption of traditional resources and energy is increasing, and environmental problems are becoming more and more serious. The development of clean and renewable new energy and the application of new energy storage technology are feasible solutions to future energy problems, and finding suitable energy storage devices and efficient energy storage systems has become a crucial research direction. Among them, lithium-ion batteries and supercapacitors have received extensive attention as new energy storage devices. Lithium-ion batteries have the advantages of high energy density, hi...

Claims

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Application Information

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IPC IPC(8): C01B32/05
CPCC01P2002/72C01P2002/82C01P2004/03C01P2006/12C01P2006/40
Inventor 潘春旭龚佑宁
Owner WUHAN UNIV
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