Preparation method of phenolic resin-based oxygen-doped microporous carbon electrode material

A technology of phenolic resin and electrode materials, applied in chemical instruments and methods, hybrid capacitor electrodes, carbon compounds, etc., can solve the problems of reducing doping rate, reducing pseudocapacitive capacity, and loss of heteroatoms, achieving high pseudocapacitive performance, Ease of removal and high conductivity

Active Publication Date: 2020-05-19
YANSHAN UNIV
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Problems solved by technology

However, in the existing experimental methods, phenolic resin usually needs to be carbonized at a higher temperature to make the corresponding carbon material have a certain conductivity. However, high-temperature carbonization leads to the loss of heteroatoms, which reduces its doping rate, thereby reducing its pseudocapacitive capacity.

Method used

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  • Preparation method of phenolic resin-based oxygen-doped microporous carbon electrode material
  • Preparation method of phenolic resin-based oxygen-doped microporous carbon electrode material
  • Preparation method of phenolic resin-based oxygen-doped microporous carbon electrode material

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preparation example Construction

[0028] The preparation method of phenolic resin-based oxygen-doped microporous carbon electrode material is to stir 3-fluorophenol and hexamethylenetetramine at room temperature, then hydrothermally polymerize to obtain fluorophenolic resin, wash and dry, carbonize, and alkalinize Inorganic activation, pickling, washing and drying in the system.

[0029] Specific steps are as follows:

[0030] A. Dissolve 3-fluorophenol and hexamethylenetetramine in 80 mL of distilled water according to a certain mass ratio to form a mixed solution, and stir at room temperature for a period of time;

[0031] B. Transfer the stirred mixed solution to a 100 mL reaction kettle, carry out hydrothermal reaction at a certain temperature to obtain a solid product, wash the solid product with water to pH=7, 60 o Drying under C for 12 hours obtained the fluorophenolic resin microspheres;

[0032] C, the fluorinated phenolic resin microsphere that step B makes is heat-treated for a period of time in n...

Embodiment 1

[0039] 0.2 g of 3-fluorophenol and 0.1 g of hexamethylenetetramine were weighed and dissolved in 80 mL of distilled water, and stirred at room temperature for 1 h until the solid sample was completely dissolved. Then, the solution was transferred to a 100 mL reactor, reacted at 160°C for 4 hours, the product was washed to pH=7, and dried at 60°C for 12 hours to obtain fluorophenolic resin microspheres.

[0040] The above sample was heated from room temperature to 500°C under the protection of nitrogen, and kept for 4 hours. After naturally cooling to room temperature, the above-mentioned carbonized sample was ground and mixed with the activator KOH at a mass ratio of 1 / 6, and the mixed sample was heated from room temperature to 500°C in a nitrogen atmosphere and kept for 8 hours. Naturally cooled to room temperature, the solid sample was washed with hydrochloric acid solution and water to pH = 7, and after drying, a phenolic resin-based oxygen-doped microporous carbon electrod...

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Abstract

The invention discloses a preparation method of a phenolic resin-based oxygen-doped microporous carbon electrode material. The preparation method comprises the following steps: stirring 3-fluorophenoland hexamethylenetetramine at normal temperature; carrying out hydrothermal polymerization to prepare fluorophenolic resin, water-washing and drying the fluorophenolic resin, and performing carbonization, alkaline inorganic activation, acid-pickling, water-washing and drying treatment to obtain the material. Since the fluorine-containing functional groups are introduced into the synthesis processof the phenolic resin, the heat treatment temperature for preparing the phenolic resin-based oxygen-doped microporous carbon electrode material is effectively reduced, and a high oxygen doping rate is achieved; in the low-temperature heat treatment process, fluorine functional groups are easy to remove, so that adjacent benzene rings are covalently bonded to form a carbon material with a large conjugated structure, and meanwhile, the obtained phenolic resin-based carbon material is ensured to have certain conductivity and high oxygen doping rate, thereby showing high pseudocapacitance performance.

Description

technical field [0001] The invention relates to a preparation method of a phenolic resin-based oxygen-doped microporous carbon electrode material, and belongs to the technical field of electrochemical supercapacitors. Background technique [0002] Supercapacitor is a new type of energy storage element, which has the advantages of high power density, fast charge and discharge speed, and good cycle stability. It is widely used in electric vehicles, mobile phones, and national defense technology and other fields. For supercapacitors, electrode materials are the key, so finding high-performance, cheap, easy-to-obtain, and environmentally friendly electrode materials has become a key goal for researchers (Electrochimica Acta, 2016, 205, 132-141; Energy Storage Materials, 2018, 14, 246-252.). [0003] Porous carbon materials as electrode materials for supercapacitors have the advantages of light weight, fast charge and discharge speed, and good stability. However, for pure carbon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/318C01B32/348H01G11/34H01G11/44
CPCC01B32/318C01B32/348H01G11/34H01G11/44
Inventor 王海燕王君妍田克松曹玲杨薇郭万春
Owner YANSHAN UNIV
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