Hexagonal-phase MoO2 nanosphere stacked micron hollow sphere and preparation method and application thereof

A hollow ball and nano ball technology, applied in the field of nanomaterials, can solve the problem of stacking micron hollow balls without nano balls, and achieve the effects of simple operation, excellent performance and good cycle performance.

Inactive Publication Date: 2012-01-25
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Moreover, there is no hexagonal MoO 2 Related patent reports on the preparation of nanosphere-stacked micron hollow spheres and their application in lithium batteries

Method used

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  • Hexagonal-phase MoO2 nanosphere stacked micron hollow sphere and preparation method and application thereof
  • Hexagonal-phase MoO2 nanosphere stacked micron hollow sphere and preparation method and application thereof
  • Hexagonal-phase MoO2 nanosphere stacked micron hollow sphere and preparation method and application thereof

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preparation example Construction

[0021] The hexagonal MoO 2 The specific steps of the preparation method of nano-stacked micron hollow spheres are:

[0022] 0.5-1.5 g MoO 3 Add the powder into deionized water, add 0.05-0.5mL of diethylenetriamine, mix well, and react at 160°C-220°C for 3-6d, and then bake at 400-850°C for 2-8h under Ar atmosphere , that is, the hexagonal MoO 2 Nanospheres stack micron hollow spheres.

[0023] The added volume of the deionized water is 30-40mL.

[0024] The micron hollow spheres are made of carbon-encapsulated hexagonal MoO 2 composed of nanospheres.

[0025] The diameter of the micron hollow sphere is 2-3 microns.

[0026] The hexagonal MoO 2 The application of nanospheres stacking micron hollow spheres is as a cathode material in lithium-ion batteries.

[0027] The lithium battery assembly method is: according to the mass ratio of the hexagonal phase MoO 2 Nano sphere stacking micron hollow sphere: polyvinylidene fluoride: acetylene black = 80: 10: 10 mixed and grou...

Embodiment 1

[0029] 0.5 g MoO 3 The powder was added to 30mL deionized water, and 0.05mL of diethylenetriamine was added, mixed evenly, and reacted at 160°C for 6d, and then calcined at 400°C for 8h under Ar atmosphere to obtain the hexagonal phase MoO 2 Nanospheres stack micron hollow spheres.

[0030] The parts not mentioned above are the same as the specific embodiments.

Embodiment 2

[0032] 1.5 g MoO 3 The powder was added to 40mL deionized water, and 0.5mL of diethylenetriamine was added, mixed evenly, and reacted at 220°C for 3d, and then calcined at 850°C for 2h under Ar atmosphere to obtain the hexagonal phase MoO 2 Nanospheres stack micron hollow spheres.

[0033] The parts not mentioned above are the same as the specific embodiments.

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Abstract

The invention relates to a hexagonal-phase MoO2 nanosphere stacked micron hollow sphere and a preparation method and application thereof. The preparation method of the micron hollow sphere comprises the step of carrying out a hydrothermal synthesis on MoO3 powder and diethylenetriamine, wherein the mass ratio of MoO3 powder to diethylenetriamine is (3-10):1. According to the invention, the preparation method of the hexagonal-phase MoO2 nanosphere stacked micron hollow sphere is proposed for the first time, operation is simple and easy, and the prepared micron hollow sphere is good in property and can be massively synthesized; and the hexagonal-phase MoO2 nanosphere stacked micron hollow sphere prepared by the method in the invention has good circulation property and high specific capacity, and the specific capacity of the prepared micron hollow sphere still can reach 250mAhg<-1> after thirty-five-time circulation under the condition that current density is 0.5Ag<-1>.

Description

technical field [0001] The invention belongs to the field of nanomaterials, and more specifically relates to a hexagonal phase MoO 2 Nanosphere stacked micron hollow sphere, preparation method and application. Background technique [0002] The core of lithium-ion batteries is lithium storage materials. Graphite is currently the anode material widely used in commercial Li-ion batteries. However, the lithium intercalation potential of graphite is low, and lithium metal deposition may be caused on the surface of graphite during charging and discharging, which poses certain safety hazards. MoO 2 Nanomaterials have become more promising anode materials for lithium-ion batteries because of their excellent electrical conductivity and high capacity. But MoO 2 When nanomaterials are used as negative electrodes, the capacity decays quickly and the cycle stability is poor. Therefore, the development of negative electrode materials with good cycle stability and high capacity is sti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/1391C01G39/02B82Y40/00
CPCY02E60/122Y02E60/10
Inventor 魏明灯张慧星
Owner FUZHOU UNIV
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