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Preparation method of heteroatom doped graphene hierarchical pore carbon material

A graphene, multi-level pore technology, applied in graphene, chemical instruments and methods, nano-carbon, etc., can solve problems such as unfavorable large-scale production, high requirements, cost, high energy consumption, etc., and achieve rich pore size and three-dimensional transmission. The effect of mass channel, large working current, good methanol tolerance

Active Publication Date: 2016-10-26
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the construction of the above-mentioned network structure can alleviate the agglomeration of graphene microsheets to a certain extent and maintain a large specific surface area, it is limited by the high requirements of related process equipment (hydrothermal and CVD, etc.), high cost and energy consumption, which is not conducive to mass production

Method used

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  • Preparation method of heteroatom doped graphene hierarchical pore carbon material
  • Preparation method of heteroatom doped graphene hierarchical pore carbon material
  • Preparation method of heteroatom doped graphene hierarchical pore carbon material

Examples

Experimental program
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Embodiment 1

[0062] Application No. 201310659172.5, named as a method for preparing graphene from electrochemically swollen graphite, the carbon / oxygen atomic ratio of the graphene sample obtained in Example 2 of the patent is 71%, the graphene unit reaches 200 μm × 200 μm, and 70% of the graphite in the sample The number of ene layers is 2-3 atomic layers. Measure 100ml of graphene aqueous solution with a concentration of 10mg / ml, and prepare a stable graphene dispersion under ultrasonic conditions: 60W, 60min, and keep the temperature at 45°C; measure 1g of "pore-forming agent" ferrous sulfate, add 5ml of water, at room temperature, mechanically stirred for 3h until completely dissolved to a clear and transparent solution. The ferrous sulfate solution was poured into the graphene dispersion liquid, ultrasonically treated, the ultrasonic power was 60W, and the time was 90min, for mixing and dispersing; after that, it was mechanically stirred at room temperature for 12h to form a uniform g...

Embodiment 2

[0067] Adopt application number 201310659172.5, named as a method for preparing graphene by electrochemically swelling graphite. The carbon / oxygen atomic ratio of the graphene sample obtained in Example 4 in the patent is 70%, and the graphene layer number of 80% in the sample is 2-3 atomic layers. . Measure 100ml of graphene aqueous solution with a concentration of 5mg / ml, and prepare a stable graphene dispersion under ultrasonic conditions: 150W, 30min, and keep the temperature at 50°C; measure 1.5g of "pore-forming agent" ferrous sulfate, add 10ml of water, at room temperature, mechanically stirred for 1h until completely dissolved to a clear and transparent solution. The ferrous sulfate solution was poured into the graphene dispersion liquid, ultrasonically treated, the ultrasonic power was 150W, and the time was 60min, for mixing and dispersing; after that, it was mechanically stirred at room temperature for 6h to form a uniform graphene / ferrous sulfate mixture.

[0068]...

Embodiment 3

[0072] Application No. 201310659172.5, named as a method for preparing graphene from electrochemically swollen graphite, the carbon / oxygen atomic ratio of the graphene sample obtained in Example 5 of the patent is 73%, the graphene unit reaches 200 μm × 200 μm, and 70% of the graphite in the sample The number of ene layers is 2-3 atomic layers. Measure 100ml of a graphene aqueous solution with a concentration of 5mg / ml, and prepare a stable graphene dispersion under ultrasonic conditions: 100W, 45min, and keep the temperature at 30°C; measure 1g of "pore-forming agent" magnesium sulfate, and add it to 10ml of water , at room temperature, mechanically stirred for 30min until completely dissolved to a clear transparent solution. The magnesium sulfate solution was poured into the graphene dispersion liquid, ultrasonically treated, the ultrasonic power was 100W, and the time was 90min, for mixing and dispersing; after that, it was mechanically stirred at room temperature for 8h to...

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Abstract

A preparation method of a heteroatom doped graphene hierarchical pore carbon material comprises the following steps: preparing graphene micro-sheet dispersing liquid by using graphene, then carrying out pore-forming etching on graphene micro-sheets in the graphene micro-sheet dispersing liquid, and preparing porous graphene micro-sheets; mixing the porous graphene micro-sheets with a fatty acid metal compound coating agent and a dopant to obtain oil-phase viscous graphene-based precursor; carrying out programmed heat treatment; carrying out acid pickling, water washing and solid-liquid separation on a product after heat treatment, and drying solid to obtain the final product. The preparation method has the advantages of low cost, simple process, low energy consumption, wide raw material source, and capability of large-scale production.

Description

technical field [0001] The invention belongs to the technical field of graphene-based material preparation, in particular to a preparation method of a heteroatom-doped graphene hierarchical porous carbon material. Background technique [0002] While the large-scale use of fossil fuels has promoted the scientific and technological progress and economic development of human society, it has also inevitably brought about increasingly serious environmental pollution and increasingly depleted energy consumption. Fuel cells, a new energy technology that can directly convert chemical energy into electrical energy in an efficient and environmentally friendly manner, have the advantages of high conversion efficiency, green and pollution-free (low or no emissions), and a wide range of fuel types. In recent years, the research on this technology has also made significant progress, and electric vehicles powered by fuel cells have been launched one after another. However, to realize the l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
CPCC01B2204/32C01P2004/04
Inventor 王俊中王聪伟
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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