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Fe2VO4/ordered mesoporous carbon composite material and application thereof

A composite material, mesoporous carbon technology, applied in the direction of active material electrodes, electrical components, electrochemical generators, etc., can solve the problems of materials prone to rupture or collapse, low electrical conductivity, capacity decline, etc., to achieve large-scale Production, inhibition of self-agglomeration, easy handling

Active Publication Date: 2020-11-06
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But Fe 2 VO 4 The electrical conductivity is not high, and it is prone to agglomeration and other phenomena. During the cycle, the material is prone to cracking or collapsing, resulting in a rapid decline in capacity.

Method used

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  • Fe2VO4/ordered mesoporous carbon composite material and application thereof
  • Fe2VO4/ordered mesoporous carbon composite material and application thereof
  • Fe2VO4/ordered mesoporous carbon composite material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Disperse 25mg CMK-3 into 40mL ethanol, ultrasonically disperse for 30min, then add 2mmol iron acetylacetonate, stir to completely dissolve iron acetylacetonate, and obtain a dispersion containing iron source; add 1mmol vanadyl acetylacetonate to 40mL ethanol and dissolved to obtain a solution containing a vanadium source; adding the solution containing a vanadium source to the dispersion containing an iron source, and stirring evenly to obtain a dispersion containing an iron source, a vanadium source and ordered mesoporous carbon;

[0030] (2) Pour the dispersion containing iron source, vanadium source and ordered mesoporous carbon into a 100mL polytetrafluoroethylene hydrothermal kettle, react at 180°C for 12h, cool to room temperature, and collect the solid product by centrifugation. Wash with ethanol several times and then dry to obtain the composite material precursor;

[0031] (4) Evenly disperse the composite material precursor in the crucible, put it into a t...

Embodiment 2

[0037] (1) Disperse 15mg CMK-3 into 40mL methanol, ultrasonically disperse for 30min, then add 1mmol ferric nitrate, stir to completely dissolve ferric nitrate, and obtain a dispersion containing iron source; add 1mmol ammonium metavanadate to 40mL methanol neutralize and dissolve to obtain a solution containing a vanadium source; add the solution containing a vanadium source to a dispersion containing an iron source, and stir evenly to obtain a dispersion containing an iron source, a vanadium source and ordered mesoporous carbon;

[0038] (2) Pour the dispersion containing iron source, vanadium source and ordered mesoporous carbon into a 100mL polytetrafluoroethylene hydrothermal kettle, react at 200°C for 10h, cool to room temperature, and collect the solid product by centrifugation. Washing with methanol several times and then drying to obtain a composite material precursor;

[0039] (4) Disperse the precursor of the composite material evenly in the crucible, put it into a ...

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Abstract

The invention relates to a Fe2VO4 / ordered mesoporous carbon composite material and application thereof, whichbelong to the technical field of sodium ion batteries. The composite material disclosed bythe invention is formed by compounding Fe2VO4 and ordered mesoporous carbon;by adding the ordered mesoporous carbon, on one hand, the self-agglomeration of Fe2VO4 can be effectively inhibited, the volume expansion in the circulation process is relieved, the integrity of the material structure in the circulation process is ensured, and the material has good circulation stability when being used asa sodium ion battery negative electrode material; on the other hand, the conductivity and the specific surface area of the material can be improved, full contact with electrolyte is ensured, and the material has good rate capability as a sodium ion battery negative electrode material; besides, the preparation process of the composite material is simple and easy to operate, large-scale production can be realized, and the composite material has a good application prospect in the aspect of sodium-ion battery negative electrode materials.

Description

technical field [0001] The invention relates to a negative electrode material for a sodium ion battery, in particular to a Fe 2 VO 4 The invention relates to an ordered mesoporous carbon composite material and its application, belonging to the technical field of sodium ion battery. Background technique [0002] With the increasingly serious environmental pollution, it is imminent to develop new energy sources. However, due to the instantaneous characteristics of wind energy and solar energy, it is necessary to develop large-scale energy storage devices with high performance and low cost. Lithium-ion batteries have achieved commercial development, but due to the shortage of lithium resources, coupled with a large number of mining, the cost of lithium-ion batteries has increased, which largely limits the application of lithium-ion batteries in large-scale energy storage. Na-ion batteries are considered to be the most promising option for next-generation large-scale energy st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M4/58H01M10/054
CPCH01M4/5825H01M4/628H01M4/625H01M10/054H01M2004/027Y02E60/10
Inventor 谢嫚江颖吴锋王紫恒叶正青王颜琦
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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