Preparation method of in-situ self-assembling N-doped super-hydrophilic carbon aerogel supercapacitor electrode material

A technology of supercapacitors and carbon aerogels, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double-layer capacitors, etc., can solve the problems of scarce fish scale resources, poor electrochemical performance of materials, and complex synthesis processes, etc. Inexpensive, improve capacitance performance, and promote the effect of transmission

Inactive Publication Date: 2016-04-13
HENAN NORMAL UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent with the publication number CN102107863A discloses a method for preparing porous carbon materials using fish scales as a carbon source and a natural template, and using an alkaline activator at the same time. The pores are continuously distributed and the specific surface area is as high as 2300m 2 / g, but fish scale resources are less and difficult to collect
In addition, although the template method provides a shortcut for the directional synthesis of carbon materials with ordered pores and high specific area, the "hard template" represented by mesoporous molecular sieves faces long preparation cycles, complex synthesis processes and Template removal and other issues; the "soft template" method represented by surfactants and their aggregates also has defects such as poor electrochemical performance of the prepared materials

Method used

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  • Preparation method of in-situ self-assembling N-doped super-hydrophilic carbon aerogel supercapacitor electrode material
  • Preparation method of in-situ self-assembling N-doped super-hydrophilic carbon aerogel supercapacitor electrode material
  • Preparation method of in-situ self-assembling N-doped super-hydrophilic carbon aerogel supercapacitor electrode material

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Experimental program
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Effect test

Embodiment 1

[0019] Dissolve 10g of polyvinyl alcohol (PVA) in 100mL of hydrochloric acid solution with a molar concentration of 0.5mol / L at 80°C in a water bath, stir for 2h, turn to room temperature, add 1.715g of N-hydroxyethylaniline, stir for 30min, add 5mL solution containing 2.853g ammonium persulfate, stirred for 30min, then added 100mL solution containing 5g boric acid, aged at room temperature for 24h, freeze-dried to obtain A1;

[0020] Under a nitrogen atmosphere, heat up A1 to 700°C at a rate of 5°C / min and carbonize it for 2 hours to obtain B1, then mix B1 and potassium hydroxide activator in an aqueous solution at a mass ratio of 1:4 for 12 hours, and place in an oven at 105°C Dry it, then place it in a tube furnace, and activate it at a rate of 5°C / min to 700°C for 2 hours under a nitrogen atmosphere, soak the activated material in a hydrochloric acid solution with a molar concentration of 2mol / L for 12 hours, and filter , washed with pure water until neutral, and dried in ...

Embodiment 2

[0027] Dissolve 10g of polyvinylpyrrolidone (PVP) in 100mL of hydrochloric acid solution with a molar concentration of 1.0mol / L at a water bath temperature of 60°C, stir for 1h, turn to room temperature, add 1.164g of aniline, stir for 30min, add 5mL of A solution containing 2.853g of ammonium persulfate was stirred for 60 minutes, then 100mL of a solution containing 5g of boric acid was added, aged at room temperature for 24 hours, and freeze-dried to obtain A2;

[0028] Under a nitrogen atmosphere, heat up A2 to 600°C at a rate of 5°C / min and carbonize it for 3 hours to obtain B2, then mix B2 and sodium hydroxide activator in an aqueous solution at a mass ratio of 1:2 for 12 hours, and place in an oven at 105°C Dry it, then place it in a tube furnace, and activate it at a rate of 10°C / min to 800°C for 2 hours under a nitrogen atmosphere, soak the activated material in a hydrochloric acid solution with a molar concentration of 2mol / L for 12 hours, filter , washed with pure wa...

Embodiment 3

[0033] Dissolve 12g of polyacrylamide (PAAm) in 100mL of sulfuric acid solution with a molar concentration of 0.5mol / L at a water bath temperature of 85°C, stir for 3h, turn to room temperature, add 1.327g of N-methylaniline, stir for 45min, then Add 5 mL of a solution containing 2.853 g of ammonium persulfate, stir for 30 minutes, then add 100 mL of a solution containing 6 g of boric acid, age at room temperature for 36 hours, and freeze-dry to obtain A3;

[0034] Under an argon atmosphere, heat A3 up to 500°C at a rate of 5°C / min and carbonize it for 4 hours to obtain B3, then mix B3 and potassium carbonate activator in an aqueous solution at a mass ratio of 1:5 for 12 hours, and place in an oven at 105°C Dry it, then place it in a tube furnace, and activate it at a rate of 10°C / min to 900°C for 2 hours under an argon atmosphere, and soak the activated material in a hydrochloric acid solution with a molar concentration of 2mol / L for 12 hours. Filter, wash with pure water unt...

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Abstract

The invention discloses a preparation method of an in-situ self-assembling N-doped super-hydrophilic carbon aerogel supercapacitor electrode material. The preparation method comprises the steps of introducing an N-containing conducting polymer and a borate radical framework in a gel three-dimensional net structure, and preparing a super-hydrophilic high-capacitance N-doped carbon aerogel supercapacitor electrode material which is of a porous structure after high-temperature activating, wherein N plays dual functions of increasing pseudocapacitance of the material and increasing the electronic transmission capacity, and borate radical ions are not only used as a cross-linking agent for maintaining a gel framework, but also have the effect of a self-assembling template so as to promote the generation of macroporous gaps. According to the preparation method of the in-situ self-assembling N-doped super-hydrophilic carbon aerogel supercapacitor electrode material, disclosed by the invention, excellent super-hydrophility can be shown without treatment of ultraviolet irradiation, or additional surface chemical modification and the like; solvent exchange needs not to be adopted, a freeze drying technology is used, the cost is low, the preparation method is simple and easy, the special three-dimensional net structure in gel is maintained, and environment friendliness is realized.

Description

technical field [0001] The invention belongs to the technical field of synthesis of supercapacitor electrode materials, and in particular relates to a preparation method of an in-situ self-assembled nitrogen-doped superhydrophilic carbon airgel supercapacitor electrode material. Background technique [0002] Due to its controllable pore size distribution and structure, porous carbon materials have played a huge application value in the fields of catalyst supports, carbon dioxide storage and supercapacitors. In a supercapacitor, the large pores of the porous carbon material are used to store the electrolyte, the mesopores are used for the rapid transport of ions, and the micropores are used as an effective place for ion accumulation, so they have a large specific surface area and micropore-mesopore-macropore pores. Porous carbon materials with reasonable structure distribution are great potential electrode materials for supercapacitors. In view of the chemical inertness of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02H01G11/86H01G11/30H01G11/32H01G11/48
CPCY02E60/13H01G11/86C01P2004/03C01P2006/12C01P2006/14C01P2006/17C01P2006/40C01P2006/90H01G11/30H01G11/32H01G11/48
Inventor 高书燕魏献军万岁阁
Owner HENAN NORMAL UNIV
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