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Molybdenum-doped anatase titanium dioxide negative electrode material for lithium ion battery and preparing method of molybdenum-doped anatase titanium dioxide negative electrode material

A lithium-ion battery, titanium dioxide technology, applied in the direction of battery electrodes, nanotechnology for materials and surface science, secondary batteries, etc., can solve the problems of low cycle capacity, low conductivity diffusion coefficient, etc., to achieve simple operation, Reversible capacity increase, environmental friendliness

Inactive Publication Date: 2019-01-29
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, anatase TiO 2 The corresponding actual cycle capacity is lower (only 167.5mAh / g), and it has lower conductivity and Li + Diffusion coefficient

Method used

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  • Molybdenum-doped anatase titanium dioxide negative electrode material for lithium ion battery and preparing method of molybdenum-doped anatase titanium dioxide negative electrode material
  • Molybdenum-doped anatase titanium dioxide negative electrode material for lithium ion battery and preparing method of molybdenum-doped anatase titanium dioxide negative electrode material
  • Molybdenum-doped anatase titanium dioxide negative electrode material for lithium ion battery and preparing method of molybdenum-doped anatase titanium dioxide negative electrode material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) First, measure 50 mL of absolute ethanol in a beaker, and add 10 mL of tetra-n-butyl titanate into it under magnetic stirring conditions to obtain solution 1;

[0031] (2) Weigh a certain amount of molybdenum source according to Mo:Ti=0.01 and dissolve it in 10mL deionized water to obtain solution 2;

[0032] (3) Pour solution 2 into solution 1 and keep stirring for 30 minutes;

[0033] (4) Then transfer the mixed solution obtained in (3) to a 100mL polytetrafluoroethylene-lined stainless steel hydrothermal reaction kettle, and place it in an oven for hydrothermal reaction at 120°C for 12 hours;

[0034] (5) After cooling to room temperature, the obtained product was centrifuged, washed with water, washed with alcohol and dried at 80°C for 12 hours;

[0035] (6) After grinding the product, place it in a muffle furnace and perform high-temperature calcination in an air atmosphere at a heating rate of 5°C / min under the conditions of 450°C and 4h. After cooling to ro...

Embodiment 2

[0037] (1) First, measure 40 mL of absolute ethanol in a beaker, and under magnetic stirring conditions, measure 10 mL of tetra-n-butyl titanate and add it to obtain solution 1;

[0038] (2) Weigh a certain amount of molybdenum source according to Mo:Ti=0.02 and dissolve it in 12mL deionized water to obtain solution 2;

[0039] (3) Pour solution 2 into solution 1 and keep stirring for 35 minutes;

[0040] (4) Then transfer the mixed solution obtained in (3) to a 100mL polytetrafluoroethylene-lined stainless steel hydrothermal reaction kettle, and place it in an oven for hydrothermal reaction under the conditions of 110°C and 10h;

[0041] (5) After cooling to room temperature, the obtained product was centrifuged, washed with water, washed with alcohol and dried at 70°C for 10 hours;

[0042] (6) After grinding the product, place it in a muffle furnace and perform high-temperature calcination in an air atmosphere at a heating rate of 5°C / min under the conditions of 450°C and ...

Embodiment 3

[0044] (1) First, measure 45 mL of absolute ethanol in a beaker, and add 10 mL of tetra-n-butyl titanate into it under magnetic stirring conditions to obtain solution 1;

[0045] (2) Weigh a certain amount of molybdenum source according to Mo:Ti=0.03 and dissolve it in 10mL deionized water to obtain solution 2;

[0046] (3) Pour solution 2 into solution 1 and keep stirring for 25 minutes;

[0047] (4) Then transfer the mixed solution obtained in (3) to a 100mL polytetrafluoroethylene-lined stainless steel hydrothermal reaction kettle, and place it in an oven for hydrothermal reaction under the conditions of 130°C and 14h;

[0048] (5) After cooling to room temperature, the obtained product was centrifuged, washed with water, washed with alcohol and dried at 90°C for 12 hours;

[0049] (6) After grinding the product, place it in a muffle furnace and perform high-temperature calcination in an air atmosphere at a heating rate of 3°C / min under the condition of 400°C for 5h. Afte...

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Abstract

The invention belongs to the technical field of lithium ion batteries, and discloses a molybdenum-doped anatase titanium dioxide negative electrode material for a lithium ion battery and a preparing method of the molybdenum-doped anatase titanium dioxide negative electrode material. The method comprises the steps of adding a titanium source into a solvent, then adding deionized water containing acertain quantity of molybdenum sources, mixing and stirring the materials to be uniform, and afterwards conducting a hydrothermal reaction; separating, washing, drying and grinding an obtained precipitate, and calcining the precipitate at high temperature to obtain the final product. By means of the method, molybdenum-doped nano anatase titanium dioxide which is high in purity and small in particle size can be simply prepared with low cost. When used as the negative electrode material, molybdenum-doped anatase titanium dioxide shows excellent circulation and rate performance; compared with undoped samples, the electrochemical performance is improved to a certain degree.

Description

technical field [0001] The invention relates to a molybdenum-doped anatase titanium dioxide negative electrode material for lithium ion batteries and a preparation method thereof, belonging to the technical field of lithium ion batteries. Background technique [0002] Lithium-ion batteries have gained popularity because of their excellent cycle performance and high energy density. For now, graphite is still the main raw material for commercial lithium-ion battery anode materials. However, while having advantages, it also has certain defects. For example, as the Li + Lithium dendrites will be formed on the surface of graphite due to the embedding and extraction of lithium, which will pierce the separator and cause a short circuit inside the battery if accumulated for a long time, posing a safety hazard. [0003] Titanium dioxide (TiO 2 ) has four common crystal forms: brookite, anatase, rutile and TiO 2 -B, and both contain TiO 6 octahedron. Among them, anatase TiO 2 ...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/48H01M10/0525B82Y30/00
CPCH01M4/364H01M4/483H01M10/0525B82Y30/00Y02E60/10
Inventor 张海朗张二卫
Owner JIANGNAN UNIV
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