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Zinc molybdate nanotube and preparation method and application thereof

A technology of zinc molybdate and nanotubes, which is applied in nanotechnology, chemical instruments and methods, molybdenum compounds, etc., can solve the problems of cumbersome experimental process, large consumption of experimental conditions, and battery capacity attenuation, so as to alleviate excessive volume expansion, Effects of abundant active sites, enhanced electrical conductivity, and ionic conductivity

Inactive Publication Date: 2019-09-10
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent document CN105540669A (application number: 201510889709.6) discloses a preparation method of zinc molybdate and the application of zinc molybdate in lithium-ion battery negative electrode materials. The prepared zinc molybdate has an irregular block structure size reaching the micron level , in addition to the large volume of the material, the particle size of zinc molybdate is not uniform, more importantly, the experimental process is cumbersome, the experimental conditions require relatively large consumption, the experimental results are difficult to control, and large-scale preparation is also difficult
When used as a negative electrode material for lithium-ion batteries, although it exhibits good lithium battery performance, its cycle stability is poor, the volume expansion is too fast, and the battery capacity decays seriously.

Method used

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  • Zinc molybdate nanotube and preparation method and application thereof
  • Zinc molybdate nanotube and preparation method and application thereof
  • Zinc molybdate nanotube and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A preparation method for zinc molybdate nanotubes, comprising the following steps:

[0040] 1) Weigh 0.2082g of zinc nitrate, 0.1236g of ammonium molybdate and 0.8g of citric acid respectively, and add them into 4mL of deionized water to form a uniform inorganic salt solution.

[0041] 2) Weigh 1 g of PVP K130, dissolve it in 9 g of ethanol, and prepare a PVP solution with a mass concentration of 10%.

[0042] 3) Mix the inorganic salt solution and the PVP solution at a volume ratio of 2:10, and form a uniform spinning solution after stirring for 12 hours.

[0043] 4) Electrospinning was performed using an electrospinning device with a voltage of 18kV and a syringe pump at a speed of 1.5mL / h. Aluminum foil was used as a receiver with a receiving distance of 10cm. The ambient temperature was 30°C and the humidity was 28%.

[0044] 5) After the electrospinning, put the obtained fiber membrane into a tube furnace for calcination under the air atmosphere, the heating rate ...

Embodiment 2

[0047] A preparation method for zinc molybdate nanotubes, comprising the following steps:

[0048] 1) Weigh 0.2777g of zinc nitrate, 0.2258g of sodium molybdate, and 1g of citric acid into 3mL of deionized water to form a uniform inorganic salt solution.

[0049] 2) Weigh 1 g of PVP K90, dissolve it in 9 g of ethanol, and prepare a PVP solution with a mass concentration of 10%.

[0050] 3) Mix the inorganic salt solution and the PVP solution at a volume ratio of 1:10, and stir for 24 hours to form a uniform spinning solution.

[0051] 4) Electrospinning was performed using an electrospinning device with a voltage of 18kV and a syringe pump at a speed of 1.5mL / h. Aluminum foil was used as a receiver with a receiving distance of 10cm. The ambient temperature was 30°C and the humidity was 28%.

[0052] 5) After the electrospinning, put the obtained fiber membrane into a tube furnace for calcination under the air atmosphere, the heating rate is 2°C / min, the calcination temperatur...

Embodiment 3

[0056] A preparation method for zinc molybdate nanotubes, comprising the following steps:

[0057] 1) Weigh 0.4165g of zinc nitrate, 0.3825g of molybdenum chloride, and 1g of citric acid into 5mL of deionized water to form a uniform inorganic salt solution.

[0058] 2) Weigh 2g of PVP K130, dissolve it in 11.3g of ethanol, and prepare a PVP solution with a mass concentration of 15%.

[0059] 3) Mix the inorganic salt solution and the PVP solution at a volume ratio of 2:10, and stir for 24 hours to form a uniform spinning solution.

[0060] 4) Electrospinning was performed using an electrospinning device with a voltage of 15kV and a syringe pump at a speed of 1mL / h. Aluminum foil was used as a receiver with a receiving distance of 10cm. The ambient temperature was 35°C and the humidity was 25%.

[0061] 5) After the electrospinning, the obtained fiber membrane was put into a tube furnace for calcination under the air atmosphere, the heating rate was 2°C / min, the calcination te...

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Abstract

The invention discloses a zinc molybdate nanotube and a preparation method thereof. The preparation method comprises the following steps: adding a zinc salt, a molybdenum salt and citric acid as raw materials into deionized water to prepare an inorganic salt solution; using PVP as a polymer template, uniformly mixing the inorganic salt solution and a PVP solution, and then performing electro-spinning; and finally performing calcination treatment on an obtained sample at 400-800 DEG C to obtain the zinc molybdate nanotube. The prepared zinc molybdate nanotube exhibits nanotube morphology, the size of the nanotube is uniform, the nanotube is prepared by piling up zinc molybdate particles with an extremely small size, and exhibits a hollow porous structure, the diameter is 0.1-1 [mu]m, the size of the zinc molybdate particles is 10-200 nm, the specific surface area is relatively large, and the surface is porous. The invention also discloses that the prepared zinc molybdate nanotube can beused as a negative electrode material of a lithium battery to be applied to prepare a battery.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a zinc molybdate nanotube and its preparation method and application. Background technique [0002] Environmental pollution and energy depletion are major issues facing society today. Solving environmental and energy problems quickly and efficiently is a hot topic in current research. Common preparation methods such as hydrothermal method, recrystallization, etc., the microscopic size of the prepared sample is too large, the process is changeable, the shape is difficult to control, and the use is not satisfactory. [0003] Electrospinning is recognized as a typical method for preparing one-dimensional nanofibers. Compared with the corresponding two-dimensional and bulk materials, the prepared one-dimensional nanomaterials have attracted extensive attention due to their excellent physicochemical properties. Molybdate has high surface energy, many ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G39/00B82Y40/00H01M4/48
CPCB82Y40/00C01G39/00C01P2004/13C01P2006/40H01M4/48Y02E60/10
Inventor 杜高辉王东苏庆梅许并社
Owner SHAANXI UNIV OF SCI & TECH
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