Graphene / Fe-MOFs composite material and preparation method thereof

A composite material and graphene technology is applied in the field of preparation of Fe-MOFs materials, which can solve the problems of high price and low electric capacity, and achieve the effects of simple raw materials, mild conditions and low production costs.

Inactive Publication Date: 2015-04-22
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, there are many methods and types of graphene-based composite materials as electrode materials, such as graphene and noble metal oxide composite materials, graphene and polymer organic composite materials, etc., but they have always had some problems, such as expensive (graphene and noble metal oxides), low capacitance (graphene and high-molecular organics), etc.

Method used

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  • Graphene / Fe-MOFs composite material and preparation method thereof
  • Graphene / Fe-MOFs composite material and preparation method thereof
  • Graphene / Fe-MOFs composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of preparation method of graphene / Fe-MOFs composite material specifically comprises the steps:

[0028] (1) Preparation of graphene oxide

[0029] After mixing 2g of flake graphite, 2g of sodium nitrate and 96ml of concentrated sulfuric acid, put it in an ice-water bath and stir evenly, then add 12g of potassium permanganate, continue to stir in the ice-water bath for 1-2h, then raise the temperature to 35°C for 2h of reaction, Then add 0.01g of hydrogen peroxide, continue to react for 10min, then suction filter the obtained reaction solution, wash the obtained filter cake with distilled water until the effluent is neutral, and finally ultrasonicate for 30min under a 600W ultrasonic wave to obtain graphene oxide;

[0030] The amount of potassium permanganate, calculated by mass ratio, potassium permanganate: flake graphite is 6:1;

[0031] The amount of hydrogen peroxide added is calculated by mass ratio, hydrogen peroxide: potassium permanganate is 1:1200;

[...

Embodiment 2

[0038] A kind of preparation method of graphene / Fe-MOFs composite material specifically comprises the steps:

[0039] (1) Preparation of graphene oxide

[0040] With the step (1) of embodiment 1;

[0041] (2), 0.15g graphene oxide, 3gFeCl 3 Add 6g of terephthalic acid into 150ml of N,N-dimethylformamide (hereinafter referred to as DMF) solvent, ultrasonically dissolve for 1h under 600W ultrasonic power, then transfer to a reaction kettle and seal it, and control the temperature at 150°C The hydrothermal reduction reaction was carried out for 15 hours, and the reaction solution obtained was suction filtered, and the obtained filter cake was repeatedly washed and suction filtered with DMF until there were no unreacted graphene oxide, FeCl or FeCl in the filter cake. 3 and terephthalic acid, and then control the temperature at 80°C for drying to obtain graphene / Fe-MOFs composite materials;

[0042] Graphene oxide, FeCl used in the above-mentioned hydrothermal reduction reactio...

Embodiment 3

[0046] A kind of preparation method of graphene / Fe-MOFs composite material specifically comprises the steps:

[0047] (1) Preparation of graphene oxide

[0048] With the step (1) of embodiment 1;

[0049] (2), 0.3g graphene oxide, 3gFeCl 3 Add 6g of terephthalic acid into 150ml of N,N-dimethylformamide (hereinafter referred to as DMF) solvent, ultrasonically dissolve for 1h under 600W ultrasonic power, then transfer to a reaction kettle and seal it, and control the temperature at 150°C The hydrothermal reduction reaction was carried out for 15 hours, and the reaction solution obtained was suction filtered, and the obtained filter cake was repeatedly washed and suction filtered with DMF until there were no unreacted graphene oxide, FeCl or FeCl in the filter cake. 3 and terephthalic acid, and then control the temperature at 80°C for drying to obtain graphene / Fe-MOFs composite materials;

[0050] Graphene oxide, FeCl used in the above-mentioned hydrothermal reduction reaction...

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Abstract

The invention discloses a graphene/Fe-MOFs composite material and a preparation method thereof. Adding oxidized graphene, FeCl3 and terephthalic acid into N, N-dimethyl formamide according to the corresponding ratio of 1-15 g : 100 g: 200 g : 150 ml, ultrasonically dissolving the mixture at a power of 600 W for 1 h, and then controlling the temperature to be at 150 degrees to conduct hydrothermal reduction reaction for 15 h; conducting suction filtration on the obtained reaction liquid, conducting repeated washing and suction filtration on the filter cake with N, N-dimethyl formamide till the filter does not contain incompletely reacted oxidized graphene, FeCl3 and terephthalic acid, controlling the temperature to be at 80 degrees to conduct drying, and then the graphene / Fe-MOFs composite material with good electro-chemical performance is obtained and can be used for super capacitor electrode materials. The graphene / Fe-MOFs composite material is simple and controllable in preparation technology, mild in conditions, low in production cost and suitable for industrial production.

Description

Technical field [0001] The present invention is a preparation area for FE-MOFS materials, which involves a graphene / Fe-MOF composite material and its preparation methods. Background technique [0002] Today, the environmental pollution is becoming increasingly serious and fossil fuel is gradually exhausted. Energy storage equipment for high energy density has become particularly important.As one of the most reliable electrochemical energy storage systems, supercapacitors have received widespread attention due to their excellent energy density and rapid charging and discharge performance.As the core component of the supercapacitors, the electrode material has a decisive impact on the performance of the capacitor. [0003] Metal-Metal-Organic Frameworks (MOFS), also known as Porous Coordination Polymers (PCPS), usually refers to the formationThe crystal material of the unlimited network structure, so it has the characteristics of both organic polymer and inorganic compounds.As a ne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/36H01G11/48
CPCY02E60/13H01G11/30H01G11/36H01G11/48H01G11/86
Inventor 张娜丁芳芳张骋黄成杰
Owner SHANGHAI INST OF TECH
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