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Nacuvo4 nanoparticle and its preparation method and application

A nanoparticle, V2O5 technology, applied in the field of nanomaterials and electrochemistry, can solve the problems of low voltage, small diffusion coefficient crystal structure, etc., and achieve the effects of high specific capacity, simple process and excellent rate.

Active Publication Date: 2018-04-27
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inherent limitations of Na-ion batteries challenge its practical application, such as low voltage, small diffusion coefficient and Na + Intercalation / deintercalation has a more pronounced effect on the crystal structure of the electrode

Method used

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  • Nacuvo4 nanoparticle and its preparation method and application
  • Nacuvo4 nanoparticle and its preparation method and application
  • Nacuvo4 nanoparticle and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Preparation of NaCuVO 4 Nano particle sodium ion battery negative electrode material, comprises the steps:

[0030] 1) First weigh NaCO with a molar ratio of 1:2:2 3 , Cu(NO 3 ) 2 2H 2 O, NH 4 VO 3 , respectively add water to dissolve, mix and stir;

[0031] 2) In the solution obtained in step 1), add citric acid with a molar ratio of 1:1 to copper metal ions as a complexing agent and stir evenly, then stir in a water bath at 80°C for 5 hours;

[0032] 3) Put the solution obtained in step 2) into an oven at 80°C and dry for 24 hours;

[0033] 4) Put the dried substance obtained in step 3) into a muffle furnace and sinter at 500° C. for 6 hours in an air atmosphere;

[0034] 5) The white product obtained in step 4) is ground to obtain NaCuVO 4 nanoparticles.

[0035] The negative pole of described sodium ion battery is NaCuVO 4 Nanoparticle sodium ion battery electrode material, sodium flakes are used as positive electrode for assembly.

[0036] Such as figu...

Embodiment 2

[0038] 1) First weigh NaCO with a molar ratio of 1:2:1 3 , Cu(NO 3 ) 2 2H 2 O, V 2 o 5 , respectively add water to dissolve, mix and stir;

[0039] 2) In the solution obtained in step 1), add citric acid with a molar ratio of 1:2 to the copper metal ion as a complexing agent, and stir in a water bath at 80°C for 3 hours;

[0040] 3) Put the solution obtained in step 2) into an oven at 80°C and dry for 24 hours;

[0041] 4) Put the dry substance obtained in step 3) into a muffle furnace and sinter at 450° C. for 6 hours in an air atmosphere;

[0042] 5) The white product obtained in step 4) is ground to obtain NaCuVO 4 nanoparticles.

[0043] The negative pole of described sodium ion battery is NaCuVO 4 Nanoparticle sodium ion battery electrode material, sodium flakes are used as positive electrode for assembly.

[0044] NaCuVO prepared by the present invention 4Nanoparticle sodium ion battery electrode material, after the battery is assembled in the glove box, the c...

Embodiment 3

[0046] 1) First weigh NaCO with a molar ratio of 1:2:2 3 , Cu(NO 3 ) 2 2H 2 O, NH 4 VO 3 , respectively add water to dissolve, mix and stir;

[0047] 2) In the solution obtained in step 1), add citric acid with a molar ratio of 1:3 to the metal ion as a complexing agent, and stir in a water bath at 80°C for 5 hours;

[0048] 3) Put the solution obtained in step 2) into an oven at 80°C and dry for 24 hours;

[0049] 4) put the dried substance obtained in step 3) into a muffle furnace and sinter at 550° C. for 6 hours in an air atmosphere;

[0050] 5) The white product obtained in step 4) is ground to obtain NaCuVO 4 nanoparticles.

[0051] The negative pole of described sodium ion battery is NaCuVO 4 Nanoparticle sodium ion battery electrode material, sodium flakes are used as positive electrode for assembly.

[0052] NaCuVO prepared by the present invention 4 Nanoparticle sodium ion battery electrode material, after the battery is assembled in the glove box, the cha...

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Abstract

The invention relates to NaCuVO4 nanoparticles and a preparation method thereof; the NaCuVO4 nanoparticles can be used as a negative electrode material of a sodium ion battery, and the preparation method comprises the following steps: 1) firstly, weighing NaCO3, Cu(NO3)2.2H2O and a vanadium source with the molar ratio of 1:2:1 to 1:2:3, respectively adding water and dissolving, then mixing, and stirring evenly; 2) in the solution obtained in the step 1), adding citric acid as a complexing agent, stirring evenly, then placing in a water bath kettle, and carrying out water bath stirring; 3) drying the solution obtained in the step 2); 4) putting the dried substance obtained in the step 3) in a muffle furnace, and sintering in an air atmosphere; and 5) grinding the white product obtained in the step 4), and thus obtaining the NaCuVO4 nanoparticles. The NaCuVO4 nanoparticles have the beneficial effects that based on uniformity and good electrical conductivity of the prepared nanoparticles, the electrode shows excellent multiplying power, high specific capacity and good cycling stability when used as the negative electrode material of the sodium ion battery.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and electrochemistry, in particular to a NaCuVO 4 Nanoparticles and a preparation method thereof, which can be used as negative electrode materials for sodium ion batteries. Background technique [0002] With the rapid development and increasing demand of portable electronic devices, electric vehicles, and energy grids, improvements in energy storage systems with high power, good stability and safety, high efficiency, and low cost are important demands. Lithium-ion batteries play a leading role in current energy storage because they have the highest energy density of any rechargeable battery in reality. However, high cost and insufficient lithium resources will limit the future application of lithium-ion batteries, especially in large-scale energy storage systems. Therefore, it is important and necessary to seek alternatives to lithium-ion batteries. Sodium sits just below lithium on the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/58H01M10/05
CPCH01M4/58H01M10/05Y02E60/10
Inventor 麦立强董轶凡王炳亮王蕾
Owner WUHAN UNIV OF TECH