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Preparation method of low-cost porous graphene

A porous graphene, low-cost technology, applied in graphene, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of restricting the application and promotion of porous graphene, difficult mass production, and many product defects. The effect of large-scale production, less structural defects, and abundant sources

Inactive Publication Date: 2016-04-20
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above methods have more or less problems of complex process, high cost, environmental pollution, many product defects and difficulty in mass production, which limits the application and promotion of porous graphene.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0027] 1) Raw material mixing: Weigh the water-based mesophase pitch and aluminum acetate according to the mass ratio of 100:100, use deionized water as the solvent, and the mass ratio of the raw material to the solvent is 1:10; mix the two evenly by mechanical stirring, and stir The temperature is 25°C, and the stirring time is 0.5h; after stirring evenly, the solvent is distilled off under reduced pressure, and placed in a 60°C vacuum oven (1.0×10 -1 Pa) dried for 4 hours, cooled to room temperature;

[0028] 2) Carbonization: place the dried sample in an atmosphere furnace, pass in argon gas (the flow rate of argon gas is 100mL / min), raise the temperature to 1800°C at 10°C / min, keep it warm for 2 hours, cool to room temperature and take it out;

[0029] 3) Pickling: Place the carbonized product in a hydrochloric acid solution (the molar concentration of the acid solution is 1mol / L), stir for 4 hours at a stirring speed of 120r / min, filter and separate, wash with deionized w...

Embodiment 2

[0032] 1) Mixing of raw materials: Weigh sucrose and aluminum sulfate according to the mass ratio of 100:50, use acetone as the solvent, and the mass ratio of raw materials to solvent is 1:3; mix the two evenly by mechanical stirring, and the stirring temperature is 30°C. Stirring time is 1h; after stirring evenly, the solvent is distilled off under reduced pressure, and placed in a vacuum oven at 35°C (1.0×10 -1 Pa) dry for 2 hours and cool to room temperature;

[0033] 2) Carbonization: place the dried sample in an atmosphere furnace, pass in nitrogen gas (nitrogen flow rate is 50mL / min), raise the temperature to 1400°C at 5°C / min, keep it warm for 1h, cool to room temperature and take it out;

[0034] 3) Pickling: Place the carbonized product in a sulfuric acid solution (the molar concentration of the acid solution is 0.5mol / L), stir for 2 hours at a stirring speed of 60r / min, filter and separate, wash with deionized water to neutrality; place in vacuum drying box (1.0 x 1...

Embodiment 3

[0037] 1) Mixing of raw materials: Weigh polystyrene and aluminum isopropoxide according to the mass ratio of 100:70, use N,N-dimethylformamide as the solvent, and the mass ratio of raw materials to solvent is 1:5; through mechanical stirring Mix the two evenly, the stirring temperature is 120°C, and the stirring time is 1.5h. After stirring evenly, the solvent was distilled off under reduced pressure and placed in a vacuum oven at 80°C (1.0×10 -1 Pa) dried for 10 hours, cooled to room temperature;

[0038] 2) Carbonization: place the dried sample in an atmosphere furnace, pass in argon gas (the flow rate of argon gas is 120mL / min), raise the temperature to 2000°C at 15°C / min, keep it warm for 0.5h, cool to room temperature and take it out;

[0039] 3) Pickling: Place the carbonized product in an oxalic acid solution (the molar concentration of the acid solution is 2mol / L), stir for 3 hours at a stirring speed of 80 rpm, filter and separate, wash with deionized water until ne...

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Abstract

The invention belongs to the field of high-performance carbon materials, and particularly relates to a preparation method of low-cost porous graphene. A low-cost carbon precursor and additives are adopted as raw materials, the raw materials are mixed, and low-temperature carbonization and pickling technology are adopted to prepare the porous graphene. The method has the advantages that the technology is simple, the cost is low, and industrialization popularization is easy; the obtained porous graphite is high in purity, the number of structural defects is small, and pore size distribution in uniform.

Description

technical field [0001] The invention belongs to the field of carbon materials, and in particular relates to a preparation method of low-cost porous graphene. Background technique [0002] Porous graphene is a graphene material with a three-dimensional network structure. As a new type of carbon material, porous graphene has good application prospects in various electrochemical device electrode materials, catalyst supports, gas separation and storage, etc. due to its unique three-dimensional structure and excellent physical and chemical properties. On the one hand, porous graphene has the advantages of graphene's unique electrochemical properties, ultra-high thermal conductivity and large specific surface area; on the other hand, on this basis, its unique three-dimensional structure can effectively avoid the graphene material itself. The agglomeration and stacking of graphene, making full use of its large specific surface area, good electron transfer rate, and the excellent p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
CPCC01B2204/04C01B2204/32C01P2004/03C01P2006/16
Inventor 林起浪王康张新奇
Owner FUZHOU UNIV
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