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Three-dimensional network structure composite material and preparation method and application thereof

A technology of network structure and composite material, applied in the field of three-dimensional network structure rGO/Co3O4@Fe2O3 composite material and its preparation, can solve problems such as few reports, and achieve the effects of high capacitance, promotion of conductivity, and enhancement of conductivity

Active Publication Date: 2020-08-25
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

To the best of our knowledge, the integration of nanowires and nanospheres with graphene layers as a hybrid network is a new strategy for graphene-based hybrid structures, but it has been rarely reported

Method used

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  • Three-dimensional network structure composite material and preparation method and application thereof
  • Three-dimensional network structure composite material and preparation method and application thereof
  • Three-dimensional network structure composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Three-dimensional network structure rGO / Co 3 o 4 @Fe 2 o 3 Its preparation method of composite material specifically comprises the following steps:

[0034] 1) Measure 30ml concentrated H 2 SO 4 Put it in a beaker and place it in an ice-water bath until the temperature drops to 0°C;

[0035] 2) Add 2g of natural graphite powder into concentrated H 2 SO 4 medium, stirring vigorously;

[0036] 3) 5g KMnO 4 Slowly add to the reaction beaker, and place the mixed solution containing the reaction mixture in a water bath at 40°C;

[0037] 4) Add 100ml deionized water drop by drop, and stir vigorously;

[0038] 5) Add 10ml, 30% H 2 o 2 , and finally a yellow dispersion was obtained;

[0039] 6) Washing repeatedly with water and 5% dilute hydrochloric acid solution to completely remove residual salt and acid;

[0040] 7) Graphene oxide is dispersed in deionized water to prepare a suspension with a concentration of 1 mg / mL. Ultrasonic exfoliation of graphene oxide ...

Embodiment 2

[0051] Three-dimensional network structure rGO / Co 3 o 4 @Fe 2 o 3 Its preparation method of composite material specifically comprises the following steps:

[0052] 1) Measure 30ml concentrated H 2 SO 4 Put it in a beaker and place it in an ice-water bath until the temperature drops to 0°C;

[0053] 2) Add 2g of natural graphite powder into concentrated H 2 SO 4 medium, stirring vigorously;

[0054] 3) 5g KMnO 4 Slowly add to the reaction beaker, and place the mixed solution containing the reaction mixture in a water bath at 40°C;

[0055] 4) Add 100ml deionized water drop by drop, and stir vigorously;

[0056] 5) Add 10ml, 30% H2 o 2 , and finally a yellow dispersion was obtained;

[0057] 6) Washing repeatedly with water and 5% dilute hydrochloric acid solution to completely remove residual salt and acid;

[0058] 7) Graphene oxide is dispersed in deionized water to prepare a suspension with a concentration of 1 mg / mL. Ultrasonic exfoliation of graphene oxide fo...

Embodiment 3

[0069] Three-dimensional network structure rGO / Co 3 o 4 @Fe 2 o 3 Its preparation method of composite material specifically comprises the following steps:

[0070] 1) Measure 60ml concentrated H 2 SO 4 Put it in a beaker and place it in an ice-water bath until the temperature drops to 0°C;

[0071] 2) Add 4g of natural graphite powder into concentrated H 2 SO 4 medium, stirring vigorously;

[0072] 3) 10gKMnO 4 Slowly add to the reaction beaker, and place the mixed solution containing the reaction mixture in a water bath at 40°C;

[0073] 4) Add 200ml deionized water dropwise and stir vigorously;

[0074] 5) Add 20ml, 30% H 2 o 2 , and finally a yellow dispersion was obtained;

[0075] 6) Washing repeatedly with water and 5% dilute hydrochloric acid solution to completely remove residual salt and acid;

[0076] 7) Graphene oxide is dispersed in deionized water to prepare a suspension with a concentration of 1 mg / mL, and the graphene oxide is exfoliated by ultraso...

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Abstract

The invention discloses a three-dimensional network structure composite material and a preparation method and application thereof, which belong to the field of nano composite material preparation. According to the three-dimensional network structure rGO / Co3O4@Fe2O3 composite material, Co3O4 nanowires are connected with rGO thin plates to form network-shaped rGO / Co3O4; then, Fe2O3 nanospheres are embedded to modify the rGO / Co3O4 to generate an rGO / Co3O4@Fe2O3 composite material, and the network position of the rGO / Co3O4 is a nucleation site for in-situ synthesis of the Fe2O3 nanospheres. The conductive one-dimensional Co3O4 nanowire disclosed by the invention provides a high-speed channel for electron transmission between two separated rGO nanosheets, the whole network is connected, the electrical conductivity of the material is enhanced, the rGO / Co3O4 is used as a supporting material for nucleation growth of Fe2O3 nanospheres, and the electrical conductivity of the Fe2O3 nanospheres ispromoted, so that the electrochemical performance of the composite material is improved.

Description

technical field [0001] The invention belongs to the field of preparation of nanocomposite materials, in particular to a three-dimensional network structure rGO / Co 3 o 4 @Fe 2 o 3 Composite materials and their preparation methods and applications. Background technique [0002] Since the 21st century, environmental and resource issues have been the focus of attention of countries all over the world. Due to the gradual scarcity of oil resources, there is an urgent need for a new generation of energy storage devices with no pollution, high safety performance, low production cost, high energy density, and high power to replace the power batteries used in traditional energy vehicles. [0003] Among various smart devices, supercapacitors are widely considered as an important category of energy storage devices due to their unique advantages such as high power density, fast charging ability, good rate maintenance ability and long cycle life. According to the charge storage mecha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/26H01G11/36H01G11/46H01G11/86B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01G11/24H01G11/26H01G11/36H01G11/46H01G11/86
Inventor 王艳杨欢陈泽祥于常浩李兰卢家同位华亮
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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