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Preparation method and application of dual-MOF derived nickel ferrite/nickel cobaltate/graphene oxide composite material

A composite material and graphene technology, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of poor conductivity of MOF, achieve easy operation, improve conductivity and stability, and require low equipment requirements.

Active Publication Date: 2021-01-01
QIQIHAR UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of poor conductivity of the MOF prepared by the existing method, and provide a preparation method and application of a double MOF-derived nickel ferrite / nickel cobaltate / graphene oxide composite material

Method used

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  • Preparation method and application of dual-MOF derived nickel ferrite/nickel cobaltate/graphene oxide composite material
  • Preparation method and application of dual-MOF derived nickel ferrite/nickel cobaltate/graphene oxide composite material
  • Preparation method and application of dual-MOF derived nickel ferrite/nickel cobaltate/graphene oxide composite material

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specific Embodiment approach 1

[0037] Embodiment 1: This embodiment is a method for preparing a nickel ferrite / nickel cobaltate / graphene oxide composite material derived from a double MOF, which is completed in the following steps:

[0038] 1. Preparation of FeNi-MIL-88;

[0039] ①. Under stirring conditions, add ferric chloride, copper nitrate and terephthalic acid into N,N-dimethylformamide, continue stirring, then add sodium hydroxide solution, and continue stirring to obtain a mixed solution ;

[0040] ②. Transfer the mixed solution to a polytetrafluoroethylene autoclave for hydrothermal reaction, and then naturally cool to room temperature to obtain the reaction product I;

[0041] ③. First, use N,N-dimethylformamide to clean the reaction product I, then use absolute ethanol to clean the reaction product I, and finally dry the cleaned reaction product I to obtain FeNi-MIL-88;

[0042] 2. Preparation of FeNi-MIL-88 / NiCo-MOF-74;

[0043] ①. Add cobalt nitrate, nickel nitrate, 2,5-dihydroxyterephthalic...

specific Embodiment approach 2

[0057] Specific embodiment two: the difference between this embodiment and specific embodiment one is: in step one (1) under the condition that the stirring speed is 200r / min~400r / min, ferric chloride, copper nitrate and terephthalic acid are added to In N,N-dimethylformamide, continue to stir at a stirring speed of 200r / min to 400r / min for 20min to 40min, then add sodium hydroxide solution, and then stir at a stirring speed of 200r / min to 400r / min Stirring was continued for 20min to 30min under certain conditions to obtain a mixed solution. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0058] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 or 2 is that in step 1 ③, the reaction product I is first cleaned with N,N-dimethylformamide for 3 to 5 times, and then used Wash the reaction product I with absolute ethanol for 3 to 5 times, and finally dry the washed reaction product I at a temperature of 70°C to 80°C and a drying time of 10h to 12h to obtain FeNi-MIL- 88. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a preparation method and application of a double-MOF-derived nickel ferrite / nickel cobaltate / graphene oxide composite material, and relates to a preparation method and application of a graphene oxide composite material. The invention aims to solve the problem of poor conductivity of MOF prepared by the existing method. The method comprises the following steps: 1, preparingFeNi-MIL-88; 2, preparing FeNi-MIL-88 / NiCo-MOF-74; 3, preparing NiFe2O4 / NiCo2O4; and 4, carrying out a hydrothermal reaction, so as to obtain NiFe2O4 / NiCo2O4 / GO. The dual-MOF derived nickel ferrite / nickel cobaltate / graphene oxide composite material is used as a supercapacitor electrode material. According to the invention, the double-MOF derived nickel ferrite / nickel cobaltate / graphene oxide composite material can be obtained.

Description

technical field [0001] The invention relates to a preparation method and application of a graphene oxide composite material. Background technique [0002] In order to alleviate the burning of fossil fuels and the crisis of environmental pollution, people began to look for greener energy storage devices, such as solar cells, supercapacitors, fuel cells, and lithium batteries. Supercapacitors have received extensive attention due to their excellent electrochemical properties, such as fast charge / discharge rates, high power density, long cycle life, and environmental friendliness. [0003] Metal-organic frameworks (MOFs) are a new class of porous crystalline materials, also known as porous coordination polymers. It is formed by linking metal ions or metal clusters with organic linkers. MOFs have well-defined pore structures and large specific surface areas. Moreover, most MOF materials can be synthesized in a simple, mild, and environmentally friendly manner. These features...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/48H01G11/30H01G11/86
CPCH01G11/30H01G11/48H01G11/86Y02E60/13
Inventor 李少斌潘婧张丽陈越谭效果
Owner QIQIHAR UNIVERSITY
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