A kind of preparation method of graphene/ferrite nanocomposite electrode material

A nano-composite, electrode material technology, applied in the direction of hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, separation methods, etc., can solve the problems of high cost, high energy consumption, secondary pollution, etc., and achieve low cost and high material source Wide, easy-to-manipulate effects

Inactive Publication Date: 2019-06-04
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these technologies have certain limitations, such as high energy consumption, high cost and secondary pollution.

Method used

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  • A kind of preparation method of graphene/ferrite nanocomposite electrode material
  • A kind of preparation method of graphene/ferrite nanocomposite electrode material
  • A kind of preparation method of graphene/ferrite nanocomposite electrode material

Examples

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Effect test

Embodiment 1

[0036] (1) Take by weighing 2.78g ferrous sulfate heptahydrate, 1.435g zinc sulfate heptahydrate, mix and be dissolved in 50ml deionized water, stir until dissolving evenly, be mixed with the mixed salt solution that Fe:Zn molar concentration ratio is 2:1;

[0037] (2) Weigh 0.5g of polyvinyl alcohol with a molecular weight of 1300 and dissolve it in 30ml of deionized water, heat and stir until uniformly mixed;

[0038] (3) Weigh 1.89g of oxalic acid (H 2 C 2 o 4 2H 2 (2) and join in the solution that step (2) prepares, mix to uniform; (4) take the graphene of 2.87g and join in the mixed solution that step (1) prepares, stir at high speed then, stirring rate is 3500r / min, the stirring time is 40min, until the graphene is evenly dispersed in the mixed solution;

[0039](5) Slowly add the mixed liquid prepared in step (3) to the dispersion liquid prepared in step (4) under the condition of high-speed stirring, and after stirring for 60 min, the dispersion liquid is subjecte...

Embodiment 2

[0052] (1) Take by weighing 2.78g ferrous sulfate heptahydrate, 0.845g manganese sulfate monohydrate, mix and be dissolved in 50ml deionized water, stir until dissolving evenly, be mixed with the mixed salt solution that Fe:Mn molar concentration ratio is 2:1;

[0053] (2) Weigh 0.5g of polyvinyl alcohol with a molecular weight of 1300 and dissolve it in 30ml of deionized water, heat and stir until uniformly mixed;

[0054] (3) Weigh 1.89g of oxalic acid (H 2 C 2 o 4 2H 2 (2) and join in the solution that step (2) prepares, mix to uniform; (4) take the graphene of 1.69g and join in the mixed solution that step (1) prepares, then high-speed stirring, stirring speed is 3500r / min, the stirring time is 40min, until the graphene is evenly dispersed in the mixed solution;

[0055] (5) Slowly add the mixed liquid prepared in step (3) to the dispersion liquid prepared in step (4) under the condition of high-speed stirring, and after stirring for 60 min, the dispersion liquid is s...

Embodiment 3

[0068] (1) Take by weighing 2.78g ferrous sulfate heptahydrate, 1.135g cobalt sulfate hexahydrate, mix and be dissolved in 50ml deionized water, stir until dissolving evenly, be mixed with the mixed salt solution that Fe:Co molar concentration ratio is 2:1;

[0069] (2) Weigh 0.5g of polyvinyl alcohol with a molecular weight of 1300 and dissolve it in 30ml of deionized water, heat and stir until uniformly mixed;

[0070] (3) Weigh 1.89g of oxalic acid (H 2 C 2 o 4 2H 2 (2) and join in the solution that step (2) prepares, mix to uniform; (4) take the graphene of 2.63g and join in the mixed solution that step (1) prepares, then high-speed stirring, stirring rate is 3500r / min, the stirring time is 40min, until the graphene is evenly dispersed in the mixed solution;

[0071] (5) Slowly add the mixed liquid prepared in step (3) to the dispersion liquid prepared in step (4) under the condition of high-speed stirring, and after stirring for 60 min, the dispersion liquid is subje...

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Abstract

The invention relates to a method for preparing a graphene / ferrite nano-composite electrode material. The method includes the following steps: 1. using the hydrothermal method to prepare a precursor of a nano-composite material; drying the precursor to obtain a black powder, incinerating the black powder, grinding the black powder to obtain an even graphene / ferrite nano-composite material; 2. Scattering an activated carbon, a carbon nano-tube, a carbon-black, a graphene / ferrite nano-composite material, a polytetrafluoroethylene to ethyl alcohol or deionized water, heating and stirring the mixture to obtain a semi-solid slurry, using a twin roller to roll and press the slurry, thus obtaining the graphene / ferrite nano-composite electrode material. According to the invention, the electrode material has a larger specific surface, excellent mechanical performance, electrochemical performance and circulatory stability, and excellent adsorption and desorption; can continuously prepare a large-area electrode film, is applicable to the technical fields of capacitive deionization and ultra-capacitors, and provide technical support to industrial production.

Description

technical field [0001] The invention belongs to the field of graphene composite materials, in particular to a method for preparing a graphene / ferrite nanocomposite electrode material. Background technique [0002] With the rapid development of the modern economy, the continuous improvement of the level of science and technology and people's living standards, climate change, environmental pollution, distribution of water resources, and the increasing global demand for fresh water, many countries are facing a crisis of severe shortage of fresh water resources. The crisis of freshwater resources has become an urgent problem to be solved in all countries in the world. Facing the severe situation, seawater desalination and water treatment technology have attracted more and more attention. Seeking green and efficient seawater desalination treatment technology is an important way to solve the shortage of freshwater resources. . At present, widely used seawater desalination technol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/86H01G11/30H01G11/36H01G11/46C02F1/469
CPCY02E60/13
Inventor 王宏志赵东玲曹庆丹李耀刚张青红侯成义
Owner DONGHUA UNIV
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