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Method for preparing nitrogen, phosphor and fluorine codoping carbon-based mixed capacitor material

A hybrid capacitance and co-doping technology, which is applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of poor cycle stability and low energy density of pseudocapacitive materials, and achieve poor cycle stability and high cycle Longevity, easy-to-prepare effects

Active Publication Date: 2017-07-28
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Method for preparing nitrogen, phosphor and fluorine codoping carbon-based mixed capacitor material
  • Method for preparing nitrogen, phosphor and fluorine codoping carbon-based mixed capacitor material
  • Method for preparing nitrogen, phosphor and fluorine codoping carbon-based mixed capacitor material

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Embodiment 1

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

Embodiment 2

[0025] Step 1): the configuration of the reaction mass is carried out in the glove box (11.311 anhydrous and oxygen-free inert environment), and catalyst 1.125g (4.09mmol) two (1,5-cyclooctadiene) nickel and 0.64g (4.09mmol) Add 2,2'-bipyridine to 60ml of N,N'-dimethylformamide, then add 0.505ml of 1,5-cyclooctadiene, heat and stir at 80°C to dissolve it completely.

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

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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 kind of porous material containing carbon, nitrogen, and fluorine as a precursor, which is synthesized by two steps of high-temperature carbonization, fluorination, nitriding, and phosphating. Hybrid capacitive materials with electric layer capacitance and pseudocapacitive properties. 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 size of the power supply but also prolongs the life of the battery. Energy density and power density are the main indicators to measure...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/86H01G11/38
CPCY02E60/13H01G11/24H01G11/38H01G11/86
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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