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Molybdenum trioxide-coated molybdenum-doped titanium dioxide nanocomposite particles and its preparation method and application

A technology of titanium dioxide and molybdenum trioxide, applied in the fields of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as the influence of electrochemical properties of materials, and achieve high electrochemical activity and high rate performance, The effect of increasing specific capacity and increasing capacity

Inactive Publication Date: 2017-10-24
EAST CHINA UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the different preparation methods, the prepared materials have different structures and characteristics, which have a great influence on the electrochemical performance of the materials, and the capacity and rate performance are still the limiting TiO 2 Application of materials in lithium batteries

Method used

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  • Molybdenum trioxide-coated molybdenum-doped titanium dioxide nanocomposite particles and its preparation method and application
  • Molybdenum trioxide-coated molybdenum-doped titanium dioxide nanocomposite particles and its preparation method and application
  • Molybdenum trioxide-coated molybdenum-doped titanium dioxide nanocomposite particles and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 5%Mo / TiO 2 Preparation of composite nanoparticles and their application in lithium batteries:

[0037] (1) Preparation of precursor solution: 12.93g of tetrabutyl titanate and 0.65g of molybdenum acetylacetonate were ultrasonically dissolved in 100mL of xylene to obtain a 0.4M (titanium source) precursor solution for use.

[0038] (2) Use a syringe pump to form fine atomized droplets through an external gas-assisted shear (shear pressure 0.12MPa) atomization burner at a certain speed of 5mL / min. h 2 / O 2 (H 2 Flow 0.1m 3 / h,O 2 Flow 1.0m 3 / h) Combustion, pyrolysis, oxidation and other reactions occur under the assistance of the diffusion flame. After leaving the flame, the vacuum pump assists the glass fiber filter to collect the molybdenum trioxide-coated molybdenum-doped titanium dioxide nanocomposite particles.

[0039] (3) Calcining the obtained nano-powder in an air atmosphere, the heating rate is 1°C / min, the calcination temperature is 350°C, and the calci...

Embodiment 2

[0042] 10%Mo / TiO 2 Preparation of composite nanoparticles and their application in lithium batteries:

[0043] (1) Preparation of precursor solution: Weigh 10.01g of tetrabutyl titanate and 2.25g of butyl titanate as a combined titanium source, dissolve them in 100mL of toluene / xylene (volume ratio of 1:1), a 0.4M (titanium source) precursor solution was obtained for use.

[0044] (2) Use a syringe pump to form fine atomized droplets through an external gas-assisted shear (shear pressure 0.15MPa) atomization burner at a certain speed of 5mL / min. h 2 / O 2 (H 2 Flow 0.15m 3 / h,O 2 Flow 1.0m 3 / h) Combustion, pyrolysis, oxidation and other reactions occur under the assistance of the diffusion flame. After leaving the flame, the vacuum pump assists the glass fiber filter to collect the molybdenum trioxide-coated molybdenum-doped titanium dioxide nanocomposite particles.

[0045] (3) Calcining the obtained nano-powder in an air atmosphere, the heating rate is 2°C / min, the c...

Embodiment 3

[0048] 15%Mo / TiO 2 Preparation of composite nanoparticles and their application in lithium batteries:

[0049] (1) Preparation of precursor solution: 14.46g of butyl titanate and 2.45g of molybdenum acetylacetonate were weighed and dissolved in 100mL of toluene by ultrasonication for 20min to obtain a 0.5M (titanium source) precursor solution for use.

[0050] (2) Use a syringe pump to form fine atomized droplets through an external gas-assisted shear (shear pressure 0.2MPa) atomization burner at a certain speed of 6mL / min. h 2 / O 2 (H 2 Flow 0.1m 3 / h,O 2 Flow 1.2m 3 / h) Combustion, pyrolysis, oxidation and other reactions occur under the assistance of the diffusion flame. After leaving the flame, the vacuum pump assists the glass fiber filter to collect the molybdenum trioxide-coated molybdenum-doped titanium dioxide nanocomposite particles.

[0051] (3) Calcining the obtained nano-powder in an air atmosphere, the heating rate is 1°C / min, the calcination temperature i...

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Abstract

The invention relates to a molybdenum trioxide coated molybdenum doped titanium dioxide nano composite particle. The surface of a trivalent molybdenum ion doped titanium dioxide nano particle is coated with molybdenum trioxide, titanium dioxide is a mixed phase composed of an anatase phase and a rutile phase, and a sintered interface is arranged among titanium dioxide particles and is of a chain structure. A flame spraying combustion technology is adopted, and the molybdenum trioxide coated molybdenum doped titanium dioxide nano composite particle can be rapidly and continuously prepared; a synergistic effect is played to the greatest extent; and the conductivity of TiO2 is improved, an extra lithium insertion space is provided by the TiO2 and MoO3 grown on the surface, the specific capacity is improved, high electrochemical activity and high rate performance of a material are ensured, and the molybdenum trioxide coated molybdenum doped titanium dioxide nano composite particle has excellent rate performance and cyclic stability when applied to the field of an anode material of a lithium ion battery.

Description

technical field [0001] The present invention relates to the field of new energy materials, in particular to a lithium-ion battery negative electrode material and its preparation method and application, the core of which is to rapidly prepare multi-level structure nanoparticles by using one-step spray combustion technology, specifically, the lithium-ion battery negative electrode material The invention relates to a molybdenum trioxide-coated molybdenum-doped titanium dioxide nanocomposite particle. Background technique [0002] Lithium-ion batteries occupy an important position in portable electronic devices, electric vehicles and other fields due to their advantages such as large energy density and excellent cycle stability. With the development of science and technology and market demand, people put forward higher requirements for lithium-ion batteries. Among them, the electrode material is one of the key issues that lithium-ion batteries need to solve urgently. At presen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/48H01M4/131H01M10/0525B82Y30/00
CPCH01M4/131H01M4/483H01M10/0525Y02E60/10
Inventor 胡彦杰李春忠李云峰牛晓凤
Owner EAST CHINA UNIV OF SCI & TECH
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