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A kind of graphene/metallocene composite supercapacitor electrode material and its preparation method and application

A technology for supercapacitors and electrode materials, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double-layer capacitors. It can solve the problems of complex preparation process, high cost, and small specific capacitance, so as to achieve simple operation, promote the flow of electrons, The effect of mild reaction conditions

Active Publication Date: 2021-09-21
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The three types of materials have their own advantages and disadvantages. Although carbon-based materials have large specific surface area, good conductivity and cycle stability, their specific capacitance is mainly electric double layer capacitance, and the specific capacitance is small; while transition metal oxides / hydroxides and conductive polymers are mainly Faraday pseudocapacitors that can undergo redox reactions, and the specific capacitance is relatively larger. However, compared with carbon-based materials, the preparation process of transition metal oxides / hydroxides is relatively complex, high cost, and the cycle stability of conductive polymers is relatively low
[0004] Poor, so it is difficult to achieve a better state in all aspects by using one material alone

Method used

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  • A kind of graphene/metallocene composite supercapacitor electrode material and its preparation method and application
  • A kind of graphene/metallocene composite supercapacitor electrode material and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0040] (1) Preparation of isocyanate-terminated graphene oxide: Disperse 100 mg of graphene oxide in 25 ml of anhydrous N,N-dimethylformamide, ultrasonically disperse for 0.5 hours and add 100 mg of p-phenylene diisocyanate under stirring. Under the protection of nitrogen, react at 10°C for 12 hours. After the reaction, the suspension is suction-filtered, washed with anhydrous N,N-dimethylformamide and dichloromethane respectively, and dried in a vacuum oven at 60°C for 12 hours after suction filtration. , to obtain isocyanate-terminated graphene oxide.

[0041] (2) Preparation of graphene / metallocene composite supercapacitor electrode material: 100 mg of isocyanate-terminated graphene oxide was ultrasonically dispersed in 25 ml of anhydrous N,N-dimethylformamide for 0.5 hours, and then 20 mg of 1, 1'-ferrocenedicarboxylic acid, reacted at 10°C for 12 hours under the protection of nitrogen, after the reaction, the suspension was filtered with suction and washed with anhydrous ...

Embodiment 2

[0043] (1) Preparation of isocyanate-terminated graphene oxide: Disperse 100 mg of graphene oxide in 25 ml of anhydrous N,N-dimethylformamide, ultrasonically disperse for 1 hour and add 300 mg of p-phenylene diisocyanate under stirring. Under the protection of nitrogen, react at 20°C for 24 hours. After the reaction, the suspension is suction-filtered, washed with anhydrous N,N-dimethylformamide and dichloromethane respectively, and dried in a vacuum oven at 60°C for 12 hours after suction filtration. , to obtain isocyanate-terminated graphene oxide.

[0044] (2) Preparation of graphene / metallocene composite supercapacitor electrode material: 100 mg of isocyanate-terminated graphene oxide was ultrasonically dispersed in 25 ml of anhydrous N,N-dimethylformamide for 1 hour, and then 50 mg of 1, 1'-ferrocenedicarboxylic acid, reacted at 25°C for 24 hours under the protection of nitrogen, after the reaction, the suspension was suction-filtered and washed with anhydrous N,N-dimethy...

Embodiment 3

[0046](1) Preparation of isocyanate-terminated graphene oxide: Disperse 100 mg of graphene oxide in 25 ml of anhydrous N,N-dimethylformamide, ultrasonically disperse for 1.5 hours, add 600 mg of p-phenylene diisocyanate under stirring, in Under the protection of nitrogen, react at 25°C for 36 hours. After the reaction, the suspension is suction-filtered, washed with anhydrous N,N-dimethylformamide and dichloromethane respectively, and dried in a vacuum oven at 60°C for 12 hours after suction filtration. , to obtain isocyanate-terminated graphene oxide.

[0047] (2) Preparation of electrode materials for graphene / metallocene composite supercapacitors: 100 mg of isocyanate-terminated graphene oxide was ultrasonically dispersed in 25 ml of anhydrous N,N-dimethylformamide for 1.5 hours, and then 100 mg of 1, 1'-ferrocenedicarboxylic acid, reacted at 25°C for 36 hours under the protection of nitrogen. After washing and suction filtration, dry at 60° C. in a vacuum oven for 12 hour...

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Abstract

The invention discloses a graphene / metallocene composite supercapacitor electrode material and its preparation method and application, and belongs to the technical field of synthesis of supercapacitor electrode materials. The method mainly includes the following steps: preparing graphene oxide (GO) by chemical oxidation ), graphene oxide and diisocyanate were reacted in N,N-dimethylformamide (DMF) to obtain isocyanate-terminated graphene oxide, followed by isocyanate-terminated graphene oxide and metallocene derivatives in N,N- Graphene / metallocene composite supercapacitor electrode material obtained through chemical grafting reaction in dimethylformamide. The invention has simple operation, mild reaction conditions, low cost, and the specific capacitance of the material is as high as 481.3 F g ‑1 .

Description

technical field [0001] The invention belongs to the field of supercapacitor electrode material preparation, in particular to a graphene / metallocene composite supercapacitor electrode material and its preparation method and application. Background technique [0002] With the continuous development and progress of industrial technology and society, the energy crisis, environmental pollution and climate change caused by the massive consumption of fossil energy are becoming more and more serious, and new energy technology has developed rapidly. Indispensable components in the field of energy technology are also receiving a lot of attention. New energy storage devices such as supercapacitors have also begun to play an increasingly important role in the field of energy storage, especially in industries such as new energy vehicles and smart electronic equipment that have developed rapidly in recent years. Electrode materials are the core functional components of supercapacitors. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/32H01G11/86
CPCH01G11/24H01G11/30H01G11/32H01G11/86Y02E60/13
Inventor 黄皓浩陈鑫刘述梅赵建青
Owner SOUTH CHINA UNIV OF TECH
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