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Preparation method and application of reduced graphene oxide coated sulfide/bimetallic oxide composite material

A double-metal oxide and graphene-coated technology, which is applied in the direction of cobalt oxide/cobalt hydroxide, graphene, chemical instruments and methods, etc., can solve the problem of not reaching high specific capacity, large particles of electrode materials, and long use time, etc. problem, to achieve the effect of high power density, long cycle life and low repeatability

Active Publication Date: 2020-09-01
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Oxide / sulfide composite material is a potential material for pseudocapacitor supercapacitors, but its traditional preparation process consumes a lot of energy and takes a long time, and the electrode material particles prepared are large, which cannot achieve the expected high specific capacity.

Method used

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  • Preparation method and application of reduced graphene oxide coated sulfide/bimetallic oxide composite material
  • Preparation method and application of reduced graphene oxide coated sulfide/bimetallic oxide composite material
  • Preparation method and application of reduced graphene oxide coated sulfide/bimetallic oxide composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037]Example 1CoS / CoFe 2 o 4 Preparation method and performance test of @rGO composite material

[0038] CoS / CoFe described in this example 2 o 4 The preparation method of @rGO composite material includes the following steps:

[0039] (1) 0.43g cobalt nitrate hexahydrate, 0.1g ferric chloride tetrahydrate, 1.1g 2,5-dihydroxyterephthalic acid, 0.5g polyvinylpyrrolidone and 0.53g graphene oxide were added to dissolve in 10mL mixed solution, and After stirring at room temperature for 60 min, it was transferred to a Teflon liner with a volume of 15 ml. Wherein, the preparation process of the mixed solution is to mix N,N-dimethylformamide, absolute ethanol and water at a volume ratio of 1:1:1 to obtain a mixed solution.

[0040] (2) Put the polytetrafluoroethylene liner equipped with the solution obtained in the above step (1) into a matching stainless steel reactor, carry out solvothermal reaction at a temperature of 150°C for 24 hours, and cool down naturally after the reac...

Embodiment 2

[0048] CoS / CoFe described in this example 2 o 4 The preparation method of @rGO composite material includes the following steps:

[0049] (1) 0.3g cobalt nitrate hexahydrate, 0.08g ferric chloride tetrahydrate, 1g2,5-dihydroxyterephthalic acid, 0.4g polyvinylpyrrolidone and 0.38g graphene oxide were added to dissolve in 5mL mixed solution, and After stirring at room temperature for 50 min, it was transferred to a polytetrafluoroethylene liner with a volume of 15 ml. Wherein, the preparation process of the mixed solution is to mix N,N-dimethylformamide, absolute ethanol and water at a volume ratio of 1:1:1 to obtain a mixed solution.

[0050] (2) Put the polytetrafluoroethylene liner equipped with the solution obtained in the above step (1) into a matching stainless steel reaction kettle, carry out solvothermal reaction at a temperature of 130°C for 20h, and cool down naturally after the reaction .

[0051] (3) Filter the reaction liquid cooled naturally in step (3) to obtai...

Embodiment 3

[0054] CoS / CoFe described in this example 2 o 4 The preparation method of @rGO composite material includes the following steps:

[0055] (1) 0.5g cobalt nitrate hexahydrate, 0.2g ferric chloride tetrahydrate, 1.3g 2,5-dihydroxyterephthalic acid, 0.6g polyvinylpyrrolidone and 0.7g graphene oxide were added to dissolve in 8mL mixed solution, and After stirring at room temperature for 55 min, it was transferred to a Teflon liner with a volume of 15 ml. Wherein, the preparation process of the mixed solution is to mix N,N-dimethylformamide, absolute ethanol and water at a volume ratio of 1:1:1 to obtain a mixed solution.

[0056] (2) Put the polytetrafluoroethylene lining with the solution obtained in the above step (1) into a matching stainless steel reaction kettle, carry out solvothermal reaction at a temperature of 120°C for 22 hours, and cool down naturally after the reaction .

[0057] (3) Filter the reaction liquid cooled naturally in step (3) to obtain a precipitate. Th...

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Abstract

The invention belongs to the technical field of supercapacitor electrode materials, and particularly relates to a preparation method of a reduced graphene oxide coated sulfide / bimetallic oxide composite material and application of the reduced graphene oxide coated sulfide / bimetallic oxide composite material in a supercapacitor energy storage material. The preparation method comprises the followingsteps: putting the raw materials into a sealed container; cobalt salt, ferric salt and 2, 4-dichlorophenol are used as raw materials; the preparation method comprises the following steps: taking 1, 5-dihydroxy terephthalic acid, polyvinylpyrrolidone and graphene oxide as raw materials; the preparation method comprises the following steps: dissolving Co2. 75Fe-MOF-74-coated GO in an organic solvent, adding a solvent, carrying out a solvothermal reaction to generate Co2. 75Fe-MOF-74-coated GO, mixing Co2. 75Fe-MOF-74-coated GO with sublimed sulfur, placing the obtained mixture in a tubular furnace, and calcining in the presence of sublimed sulfur and inert gas to obtain the target product. The CoS / CoFe2O4 (at) rGO nano composite material prepared by the preparation method disclosed by the invention has a hierarchical porous lamellar nano flower structure; the preparation method is simple in process and is applied to the construction of the supercapacitor, the constructed supercapacitoris high in energy density, large in power density and long in cycle life, the defects that a traditional sulfide oxide composite material is difficult to prepare, large in preparation energy consumption and low in repeatability are overcome, and the preparation method has a great application prospect.

Description

technical field [0001] The invention belongs to the technical field of supercapacitor electrode materials, and in particular relates to a preparation method of a reduced graphene oxide-coated sulfide / double metal oxide composite material and its application in supercapacitor energy storage materials. Background technique [0002] In the process of rapid development of the current world economy, there is inevitably a huge demand for energy. The conversion of traditional fossil energy into usable energy will cause a variety of environmental pollution. Among other different types of energy, solar energy and wind energy, as promising renewable energy sources, can provide energy sources for power generation. However, the electricity generated by these energy sources is not Stability, and cannot be fully managed and utilized. Therefore, it is of great importance to explore new energy storage and conversion systems that are cheap, efficient and environmentally friendly. Supercapa...

Claims

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Application Information

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IPC IPC(8): C01B32/184C01G51/00C01G51/04B82Y30/00B82Y40/00H01G11/30H01G11/36H01G11/46
CPCB82Y30/00B82Y40/00C01G51/00C01G51/04C01P2002/72C01P2004/03C01P2004/04C01P2004/64C01P2004/80C01P2006/17C01P2006/40C01B32/184H01G11/30H01G11/36H01G11/46Y02E60/13
Inventor 夏正强贾旭任崇婷陈三平
Owner NORTHWEST UNIV
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