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A preparation method of nitrogen, phosphorus and fluorine co-doped carbon-based hybrid capacitor material

A hybrid capacitance and co-doping technology, which is applied in the manufacture of hybrid/electric double layer capacitors and hybrid capacitor electrodes, can solve the problems of low energy density and poor cycle stability of pseudocapacitive materials, achieve high cycle life, and solve cycle stability Poor performance and mild synthesis conditions

Active Publication Date: 2018-07-24
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention synthesizes a nitrogen, phosphorus, and fluorine co-doped porous carbon material through a simple method. The problems of low energy density and poor cycle stability of pseudocapacitive materials in supercapacitors

Method used

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  • A preparation method of nitrogen, phosphorus and fluorine co-doped carbon-based hybrid capacitor material
  • A preparation method of nitrogen, phosphorus and fluorine co-doped carbon-based hybrid capacitor material
  • A preparation method of nitrogen, phosphorus and fluorine co-doped carbon-based hybrid capacitor material

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Embodiment 1

[0021] Step 1): The configuration of the reaction materials is carried out in a glove box (anhydrous and oxygen-free inert environment). The catalyst is 1.125g (4.09mmol) bis(1,5-cyclooctadiene) nickel and 0.64g (4.09mmol) 2 , 2'-Bipyridine was added to 60ml of N,N'-dimethylformamide, and 0.505ml of 1,5-cyclooctadiene was added, heated and stirred at 80°C to make it completely dissolved. 0.24g of 2,4,6-tris(4-bromophenyl)-1,3,5-triazine (TBT) and 0.1g of 1,4-dibromo-2-fluorobenzene were added to the above solution to obtain The purple solution was heated at 85°C to react for 10 hours. After the reaction, the reactant was taken out. Add 5ml of concentrated hydrochloric acid dropwise to the material taken and shake it continuously until the solution becomes a green colloidal solution doped with light yellow flocculent precipitate. The material was poured into a suction filter bottle for filtration, and washed with 5×15 mL chloroform, 5×15 mL tetrahydrofuran, and 5×15 mL deionize...

Embodiment 2

[0025] Step 1): The configuration of the reaction materials is carried out in a glove box (11.311 anhydrous and oxygen-free inert environment), the catalyst is 1.125g (4.09mmol) bis(1,5-cyclooctadiene) nickel and 0.64g (4.09mmol) 2,2'-Bipyridine was added to 60ml of N,N'-dimethylformamide, and 0.505ml of 1,5-cyclooctadiene was added, and heated and stirred at 80°C to completely dissolve it.

[0026] Add 0.24g 2,4,6-tris(4-bromophenyl)-1,3,5-triazine (TBT) and 0.106g 1,4-dibromo-2,5-difluorobenzene to the above solution In the middle, a purple solution was obtained, and the reaction was heated at 85°C for 10 hours. After the reaction was completed, the reactant was taken out. Add 5ml of concentrated hydrochloric acid dropwise to the material taken and shake it continuously until the solution becomes a green colloidal solution doped with light yellow flocculent precipitate. The material was poured into a suction filter bottle for filtration, and washed with 5×15 mL chloroform, 5×1...

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Abstract

The invention relates to a method for preparing a nitrogen, phosphor and fluorine codoping carbon-based mixed capacitor material and belongs to a field of doping type porous carbon-based capacitor material technology. The preparation method is performed in an anhydrous and oxygen-free inert environment, a catalyst and 2, 2'-dipyridyl are added in N,N'-dimethylformamide, and 1,5-cyclooctadiene is added in the N,N'-dimethylformamide, and heating to dissolve is performed; nitrogen source and fluorine source are added in the solution, and after the heating reaction finished, reactants are taken out; concentrated hydrochloric acid is dropwise added in an obtained material, and a colloidal solution doped with flocculent precipitate is obtained; the material is filtered and cleaned to obtain a material containing N and F, the material containing N and F is transferred to a porcelain boat, and high temperature carbonization is performed on the material containing N and F at a temperature range of 500-1000 DEG C; and high temperature phosphorus doping is performed on the carbonized material containing N and F and a P source. According to the invention, the synthesis condition is mild, the experiment operation is simple, the specific capacitance of the material reaches up to 250Fg<-1>, and problems that the carbon-based supercapacitor has low energy density, and faradaic pseudocapacitance material has poor cycling stability are solved.

Description

Technical field [0001] The invention belongs to the technical field of doped porous carbon-based capacitor materials, and specifically relates to a method that uses carbon, nitrogen, and fluorine-containing porous materials as precursors to be synthesized through a two-step high-temperature carbonization, fluorination, nitridation, and phosphating method. Hybrid capacitor material with electric layer capacitor and pseudo-capacitance performance. Background technique [0002] Supercapacitor is a new type of energy storage device between batteries and traditional capacitors. It has the advantages of long cycle life, high power density, fast charge and discharge speed, etc., and has broad application prospects. In electric vehicles, the combination of supercapacitors and batteries can provide high power and high energy respectively, which not only reduces the volume of the power supply but also extends the life of the battery. Energy density and power density are the main indicator...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/86H01G11/38
CPCY02E60/13
Inventor 程元徽向中华郭佳宁李东明张琪宇
Owner BEIJING UNIV OF CHEM TECH
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