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A preparation method of thin-film electrodes based on covalent organic framework materials

A covalent organic framework and thin-film electrode technology, which is applied in the manufacture of hybrid capacitor electrodes, hybrid/electric double layer capacitors, etc., can solve problems affecting capacitance performance, decrease in the number of electrochemical active sites, poor conductivity, etc., and achieve excellent capacitance Performance, Elimination of preprocessing steps, Effects of simple equipment

Active Publication Date: 2021-03-30
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the generally poor conductivity of covalent organic framework materials, the number of electrochemically active sites decreases, which affects its capacitive performance. Therefore, it is necessary to modify covalent organic framework materials or form composite electrode materials with other materials.

Method used

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  • A preparation method of thin-film electrodes based on covalent organic framework materials
  • A preparation method of thin-film electrodes based on covalent organic framework materials
  • A preparation method of thin-film electrodes based on covalent organic framework materials

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Add 42.8 mg of 1,3,5-trimethyl-2,4-dicyanopyridine, 98.4 mg of 2,4,6-tris(p-formylphenyl)-1,3,5-tris to a 15 mL pressure bottle Oxyzine, 130mg of anhydrous piperidine and 10mL of anhydrous N,N-dimethylformamide were heated to 120°C for 48h under the protection of argon. After the reaction, the solid was collected by vacuum filtration, washed with dichloromethane and water, and the collected solid was dried in vacuum for 24 hours to obtain a yellow solid product, a nitrogen-rich covalent organic framework material with fully conjugated carbon-carbon double bonds, about 100 mg.

[0035] 14 mg of the prepared covalent organic framework material and 6 mg of commercially available single-walled carbon nanotubes were dispersed with 20 mL of N,N-dimethylformamide, and the dispersion liquid was homogenized using probe ultrasound to obtain a dispersion liquid.

[0036] An organic film with a pore size of 0.22 microns is used as a filter membrane, and the filter membrane is cover...

Embodiment 2

[0039] Add 30 mg of 1,3,5-trimethyl-2,4-dicyanopyridine, 90 mg of 2,4,6-tris(p-formylphenyl)-1,3,5-triazine, 120mg of anhydrous piperidine and 5mL of anhydrous N,N-dimethylformamide were heated to 110°C for 60h under the protection of argon. After the reaction, the solid was collected by vacuum filtration, washed with dichloromethane and water, and the collected solid was vacuum-dried for 20 h to obtain a yellow solid product, a nitrogen-rich covalent organic framework material linked by fully conjugated carbon-carbon double bonds.

[0040] 10 mg of the prepared covalent organic framework material and 1 mg of commercial single-walled carbon nanotubes were dispersed with 10 mL of N,N-dimethylformamide, and the dispersion liquid was homogenized using probe ultrasound to obtain a dispersion liquid.

[0041] The organic membrane with a pore size of 0.22 microns is used as a filter membrane, and the electrode template with the shape of fingers (10 finger shapes, width 1.6mm, length...

Embodiment 3

[0043]Add 50 mg of 1,3,5-trimethyl-2,4-dicyanopyridine, 110 mg of 2,4,6-tris(p-formylphenyl)-1,3,5-triazine, 140mg of anhydrous piperidine and 15mL of anhydrous N,N-dimethylformamide were heated to 130°C for 40h under the protection of argon. After the reaction, the solid was collected by vacuum filtration, washed with dichloromethane and water, and the collected solid was vacuum-dried for 30 hours to obtain a yellow solid product, a nitrogen-rich covalent organic framework material linked by fully conjugated carbon-carbon double bonds.

[0044] 20 mg of the prepared covalent organic framework material and 10 mg of commercial single-walled carbon nanotubes were dispersed with 30 mL of N,N-dimethylformamide, and the dispersion liquid was homogenized by using probe ultrasound to obtain a dispersion liquid.

[0045] The organic membrane with a pore size of 0.22 microns is used as a filter membrane, and the electrode template with the shape of fingers (10 finger shapes, width 1.6m...

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Abstract

The invention discloses a preparation method of a thin film electrode based on a covalent organic frame material, and relates to the field of material preparation. The method comprises the following steps: firstly a nitrogen-rich covalent organic frame material with fully conjugated carbon-carbon double bonds is synthesized; then the prepared covalent organic frame material and the commercializedsingle-walled carbon nanotube are dispersed by N, N-dimethylformamider to obtain a dispersion; then the dispersion is added to an electrode template and the thin film electrode is obtained by vacuum pumping and filtering; and finally the obtained thin film electrode is transferred to a flexible substrate, and vacuum drying is performed so as to obtain a flexible electrode which can be used for manufacturing a flexible micro supercapacitor. The preparation method has the advantages of easy operation, simple equipment and large-scale preparation. The shape of interposer finger is applied to makethe electrode spacing as small as possible and the device as miniaturized as possible; and the specific area capacitance can be up to 15.2 mF.cm<-2> so as to have great application potential in supercapacitors.

Description

technical field [0001] The invention relates to the field of material preparation, in particular to a method for preparing a thin film electrode based on a covalent organic framework material. Background technique [0002] Supercapacitor is one of the electrochemical energy storage technologies with huge application prospects at present. It is a new type of energy storage device that mainly relies on electric double layer capacitance and redox capacitance for charge storage. Among them, micro-supercapacitors have attracted extensive attention from researchers because of their ultra-high power density, fast frequency response, and excellent cycle life. [0003] Various shapes of micro-supercapacitors have been reported, including fibrous, two-dimensional planar, and three-dimensional micro-supercapacitors, and have been applied in wearable electronic devices, implantable and portable microdevices. Currently widely used electrode materials include carbon materials, metal comp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/86H01G11/24H01G11/30H01G11/36H01G11/26
CPCH01G11/24H01G11/26H01G11/30H01G11/36H01G11/86Y02E60/13
Inventor 许俊松何亚飞杨鹏毕帅郭威吴东清张帆
Owner SHANGHAI JIAOTONG UNIV
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