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Preparation method of array magnetic reduced graphene oxide-carbon nanofiber

A technology of carbon nanofibers and oxidized stones, which is applied in the fields of fiber chemical characteristics, structural parts, textiles and papermaking, etc., can solve the problems that the specific surface area of ​​RGO cannot be fully utilized, the specific surface area of ​​electrode materials is reduced, and the charge storage capacity is reduced. Achieve the effects of increasing conductivity, preventing agglomeration and compounding, and increasing load capacity

Active Publication Date: 2018-07-24
锦州凯美能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the RGO obtained by the above method is arranged randomly in the composite material, and the RGO is covered by carbon fibers and nanoparticles, so the specific surface area of ​​RGO cannot be fully utilized.
Therefore, the specific surface area of ​​the electrode material decreases and the charge storage capacity decreases

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0033] Example 1 Preparation of arrayed magnetic RGO@carbon nanofibers

[0034] process such as figure 1 As shown, the specific preparation steps are as follows:

[0035] 1. Preparation of graphene oxide

[0036] Graphene oxide was prepared by the Hummer method; 10.0 g of 10,000 mesh nano-flake graphite was taken as a raw material, and slowly added to a glass container containing 150 mL of concentrated sulfuric acid under stirring, and the temperature was maintained at (0±1) °C; then, slowly added The mixture of 5.0g sodium nitrate and 30.0g potassium permanganate is maintained at (0±1)°C under stirring, and the reaction is completed within 2 hours; in a constant temperature water bath at (35±3)°C, keep stirring for 30 minutes, and slowly add 460mL water, raise the temperature to 98°C, maintain at this temperature for 15 minutes, dilute to 1400mL with warm water, pour 100mL of H 2 o 2 (5wt%), filtered while hot, fully washed the filter cake with 5wt% HCl until there was no...

Embodiment 2

[0048] 1. Preparation of graphene oxide

[0049] Graphene oxide was prepared by the Hummer method; 10.0 g of 12000 mesh nano flake graphite was taken as a raw material, and slowly added to a glass container containing 200 mL of concentrated sulfuric acid under stirring, and the temperature was maintained at (0±1) °C; then, slowly added The mixture of 5.0g sodium nitrate and 30.0g potassium permanganate is maintained at (0±1)°C under stirring, and the reaction is completed within 2 hours; in a constant temperature water bath at (35±3)°C, keep stirring for 30 minutes, and slowly add 460mL water, raise the temperature to 98°C, maintain at this temperature for 15 minutes, dilute to 1400mL with warm water, pour 100mL of H 2 o 2 (5%), filtered while hot, fully washed the filter cake with 5% HCl until there was no SO in the filtrate 4 2- (with BaC1 2 solution detection), at 50°C at P 2 o 5 After drying in vacuum for 24h in the presence, graphene oxide was obtained;

[0050] 2....

Embodiment 3

[0061] 1. Preparation of graphene oxide

[0062] Graphene oxide was prepared by the Hummer method; 10.0 g of 15,000 mesh nano flake graphite was taken as a raw material, and slowly added to a glass container containing 230 mL of concentrated sulfuric acid under stirring, and the temperature was maintained at (0±1)°C; then, slowly added The mixture of 5.0g sodium nitrate and 30.0g potassium permanganate is maintained at (0±1)°C under stirring, and the reaction is completed within 2 hours; in a constant temperature water bath at (35±3)°C, keep stirring for 30 minutes, and slowly add 460mL water, raise the temperature to 98°C, maintain at this temperature for 15 minutes, dilute to 1400mL with warm water, pour 100mL of H 2 o 2 (5%), filtered while hot, fully washed the filter cake with 5% HCl until there was no SO in the filtrate 4 2- (with BaC1 2 solution detection), at 50°C at P 2 o 5 After drying in vacuum for 24h in the presence, graphene oxide was obtained;

[0063] 2....

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Abstract

The invention discloses a preparation method of array magnetic reduced graphene oxide-carbon nanofiber. The method comprises the following steps: taking flake graphite as a raw material, and preparinggraphene oxide with a Hummer method, so as to obtain the graphene oxide; preparing the graphene oxide and magnetic material precursor into magnetic material modified graphene oxide with a hydrothermal / solvothermal method, preparing the magnetic material modified graphene oxide, polymer and a solvent into a magnetic graphene oxide-polymer mixed electrostatic spinning precursor solution, preparingmagnetic graphene oxide-polymer compounded electrostatic spinning fiber, and performing heat treatment, so as to obtain a magnetic graphene oxide carbon nanofiber composite material. The method has the advantages that an RGO surface loaded nano metal oxide particle has a pseudocapacitor characteristic, can improve the charge energy storage density of the composite material, and is suitable for high-capacity power supercapacitors, with the specific capacitance being 240.3CP / F*g<-1>-254.1CP / F*g<-1> and the charge discharge efficiency being 99.1% to 99.6%.

Description

technical field [0001] The invention belongs to the field of electrode material preparation, in particular to a method for preparing an array magnetically reduced graphene oxide-carbon nanofiber. Background technique [0002] Reduced graphene oxide (RGO) has an open two-dimensional structure, high specific surface area, and good electrochemical performance, making it widely used as an electrode material in energy storage devices such as supercapacitors and lithium-ion batteries. However, RGO is easy to agglomerate, has low charge storage density, and is difficult to form and process, which restricts its use as an electrode material for large-capacity power chemical power sources. Using carbon nanofibers with a high aspect ratio as a carrier to load RGO can better solve these problems. Electrospinning can continuously produce high aspect ratio nanometer size fibers. Using electrospun fibers as carbon source materials, nanometer-sized carbon fibers with high aspect ratio, co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/56H01G11/36H01G11/40H01M4/88
CPCD01F6/56H01G11/36H01G11/40H01M4/88H01M4/8817Y02E60/13Y02E60/50
Inventor 何铁石于晓东王欧兰孟祥苓韩越
Owner 锦州凯美能源有限公司
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