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Ruthenium dioxide quantum dot modified vanadium pentoxide nano material as well as preparation method and application of material

A technology of vanadium pentoxide and nanomaterials, applied in the field of nanomaterials and electrochemistry, can solve problems such as low electronic conductivity, poor structural stability, slow ion diffusion rate, etc., and achieve high power density, high energy density, and process simple effect

Active Publication Date: 2014-10-29
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the key issues restricting its wide application are: slow ion diffusion rate, low electronic conductivity and poor structural stability

Method used

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  • Ruthenium dioxide quantum dot modified vanadium pentoxide nano material as well as preparation method and application of material
  • Ruthenium dioxide quantum dot modified vanadium pentoxide nano material as well as preparation method and application of material
  • Ruthenium dioxide quantum dot modified vanadium pentoxide nano material as well as preparation method and application of material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The preparation method of the vanadium pentoxide nanomaterial modified by bowtie-shaped ruthenium dioxide quantum dots, it comprises the steps:

[0034] 1) Dissolve 1 mmol of vanadium pentoxide powder in 30 mL of deionized water, add 5 mL of hydrogen peroxide, and stir at room temperature for 10 minutes;

[0035] 2) Add 1.5 mmol ammonium dihydrogen phosphate to the solution obtained in step 1), and stir for 10 minutes;

[0036] 3) Add 0.08 mmol ruthenium chloride to the solution obtained in step 2), and continue to stir for 15 minutes;

[0037] 4) Transfer the solution obtained in step 3) into a 50mL reaction kettle, react at 180°C for 3 hours, take out the reaction kettle, and naturally cool to room temperature;

[0038] 5) Centrifuge the product obtained in step 4), wash it with alcohol for 3 times, and dry it in an oven at 70°C to obtain a bowtie-shaped vanadium pentoxide nanomaterial precursor modified with ruthenium dioxide quantum dots;

[0039] 6) The product o...

Embodiment 2

[0043] 1) Dissolve 1 mmol of vanadium pentoxide powder in 30 mL of deionized water, add 5 mL of hydrogen peroxide, and stir at room temperature for 10 minutes;

[0044] 2) Add 1 mmol ammonium dihydrogen phosphate to the solution obtained in step 1), and stir for 20 minutes;

[0045] 3) Add 0.06 mmol ruthenium chloride to the solution obtained in step 2), and continue to stir for 15 minutes;

[0046] 4) Transfer the solution obtained in step 3) into a 50mL reaction kettle, react at 180°C for 3 hours, take out the reaction kettle, and naturally cool to room temperature;

[0047] 5) Centrifuge the product obtained in step 4), wash it with alcohol for 3 times, and dry it in an oven at 70°C to obtain a bowtie-shaped vanadium pentoxide nanomaterial precursor modified with ruthenium dioxide quantum dots;

[0048] 6) The product obtained in step 5) was placed in a muffle furnace and calcined at 400° C. for 3 hours to obtain a bowtie-shaped vanadium pentoxide nanomaterial modified wit...

Embodiment 3

[0051] 1) Dissolve 1 mmol of vanadium pentoxide powder in 30 mL of deionized water, add 5 mL of hydrogen peroxide, and stir at room temperature for 10 minutes;

[0052] 2) Add 1.5 mmol ammonium dihydrogen phosphate to the solution obtained in step 1), and stir for 20 minutes;

[0053] 3) Add 0.1 mmol ruthenium chloride to the solution obtained in step 2), and continue stirring for 15 minutes;

[0054] 4) Transfer the solution obtained in step 3) into a 50mL reaction kettle, react at 180°C for 4 hours, take out the reaction kettle, and naturally cool to room temperature;

[0055] 5) Centrifuge the product obtained in step 4), wash it with alcohol for 3 times, and dry it in an oven at 70°C to obtain a bowtie-shaped vanadium pentoxide nanomaterial precursor modified with ruthenium dioxide quantum dots;

[0056] 6) The product obtained in step 5) was placed in a muffle furnace and calcined at 450° C. for 2 hours to obtain a bowtie-shaped vanadium pentoxide nanomaterial modified w...

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Abstract

The invention relates to a ruthenium dioxide quantum dot modified vanadium pentoxide nano material and a preparation method of the material. The material is prepared by the preparation method comprising the following steps: (1) dissolving vanadium pentoxide powder into deionized water, adding hydrogen peroxide and stirring; (2) adding ammonium dihydrogen phosphate and stirring; (3) adding ruthenium chloride and continuously stirring; (4) transferring the solution obtained in the step (3) to a reactor, performing hydrothermal reaction, taking out the reactor, and naturally cooling to room temperature; (5) centrifuging, separating, washing and drying the product obtained in the step (4) to obtain a precursor; and 6) calcining in a muffle furnace to obtain the bowknot-shaped ruthenium dioxide quantum dot modified vanadium pentoxide nano material. The material and the preparation method have the beneficial effects that the bowknot-shaped ruthenium dioxide quantum dot modified vanadium pentoxide nano material is obtained by a one-step method based on unique advantages of quantum dots and ruthenium dioxide, and the process is simple, the requirement of green chemistry is met and the equipment requirement is low, so that market promotion is facilitated.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and electrochemistry, and in particular relates to a vanadium pentoxide nanometer material modified with ruthenium dioxide quantum dots and a preparation method thereof, which can be used as a high-rate lithium-ion battery cathode active material. Background technique [0002] As the global economic and environmental problems become more and more severe, it is particularly important to develop energy storage devices with high efficiency and environmental friendliness. Lithium-ion batteries are considered to be the most potential energy storage systems because of their high energy density, high safety, and environmental friendliness. Lithium-ion batteries have been widely used in portable electronic devices such as mobile phones and notebook computers. However, the low diffusion rate of lithium ions and electrons leads to poor rate characteristics and low power density. To advance its appli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/131H01M4/1391B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/131H01M4/1391H01M4/485H01M10/0525H01M2004/021Y02E60/10
Inventor 麦立强韦秀娟安琴友魏湫龙
Owner WUHAN UNIV OF TECH
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