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Preparation method of spherical lithium ion battery anode composite material

A technology for lithium-ion batteries and composite materials, which is applied in the preparation of negative spherical vanadium trioxide/carbon composite materials for lithium-ion batteries and the preparation of spherical lithium-ion battery negative electrodes V2O3/C composite materials, which can solve the problem of low specific surface area of ​​materials, Unfavorable industrial application, poor electrochemical performance and other problems, to achieve the effects of high specific surface area, shortened diffusion path, and high tap density

Inactive Publication Date: 2018-04-13
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, V 2 o 3 The material also has some disadvantages
nanostate V 2 o 3 The material has a high specific surface area, which is beneficial to improve the electrochemical performance of the material, but the nano-state V 2 o 3 The material is easy to agglomerate, and the tap density is low, which is not conducive to industrial application. At the same time, it is vulnerable to structural damage caused by the stress generated during the lithium ion deintercalation process during the electrochemical cycle.
And the micron-scale spherical V 2 o 3 The material can relieve the stress generated during the lithium ion deintercalation process, and the micron-scale spherical particles have a higher tap density, which is conducive to industrial applications; but the micron-scale spherical V 2 o 3 The specific surface area of ​​the material is low and the electrochemical performance is poor

Method used

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  • Preparation method of spherical lithium ion battery anode composite material
  • Preparation method of spherical lithium ion battery anode composite material
  • Preparation method of spherical lithium ion battery anode composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] This embodiment includes the following steps:

[0032] (1) First, weigh 1 mmol of glucose, add it to 50 mL of water and ethylene glycol mixed solution, wherein the volume ratio of water and ethylene glycol is 1:10, transfer it to a magnetic stirrer, continue stirring and heating until Dissolve, heat at 80°C, and stir at 400 rpm to obtain solution A;

[0033] (2) Then, weigh 5 mmol of ammonium metavanadate and add it into solution A, continue to stir and heat until dissolved, the heating temperature is 80°C, and the stirring rate is 450 rpm to obtain solution B;

[0034] (3) Next, transfer the solution B into the reaction kettle, and conduct a solvothermal reaction at a temperature of 190° C. for 18 hours to obtain a precursor;

[0035] (4) The obtained precursor was washed with alcohol three times, centrifuged, dried, and finally heat-treated under an inert atmosphere to obtain V 2 o 3 / C material. The centrifugal speed is 8000 r / min; the drying temperature is 80°C,...

Embodiment 2

[0046] This embodiment includes the following steps:

[0047] (1) First, weigh 0.5 mmol of glucose, add it to a mixed solution of 60 mL of water and ethylene glycol, wherein the volume ratio of water and ethylene glycol is 1:8, transfer it to a magnetic stirrer, keep stirring and Heat until dissolved, the heating temperature is 80°C, the stirring rate is 400 rpm, and solution A is obtained;

[0048] (2) Then, weigh 6 mmol of sodium vanadate and add it into solution A, continue to stir and heat until dissolved, the heating temperature is 80°C, and the stirring rate is 450 rpm to obtain solution B;

[0049] (3) Next, transfer the solution B into the reaction kettle, and conduct a solvothermal reaction at a temperature of 180° C. for 20 hours to obtain a precursor;

[0050] (4) The obtained precursor was washed with alcohol three times, centrifuged, dried, and finally heat-treated under an inert atmosphere to obtain V 2 o 3 / C material. The centrifugal speed is 8000 r / min; th...

Embodiment 3

[0058] This embodiment includes the following steps:

[0059] (1) First, weigh 0.1 mmol of glucose, add it to 20 mL of water and ethylene glycol mixed solution, wherein the volume ratio of water and ethylene glycol is 1:12, transfer it to a magnetic stirrer, continue to stir and heat Until it dissolves, the heating temperature is 80°C and the stirring rate is 400 rpm to obtain solution A;

[0060] (2) Then, weigh 7 mmol of sodium metavanadate and add it into solution A, continue to stir and heat until dissolved, the heating temperature is 80°C, and the stirring rate is 450 rpm to obtain solution B;

[0061] (3) Next, transfer the solution B into the reaction kettle, and conduct a solvothermal reaction at a temperature of 195° C. for 14 hours to obtain a precursor;

[0062] (4) Finally, wash 3 times with alcohol, centrifuge, dry, and finally heat-treat in an inert atmosphere to obtain V 2 o 3 / C material. The centrifugal speed is 8000 r / min; the drying temperature is 80°C, ...

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Abstract

The invention provides a preparation method of a spherical lithium ion battery anode composite material. The preparation method comprises the following steps that 1, 0.1-2 mmol of a saccharide compound is weighed and added into 20-80 mL of a water and ethylene glycol mixed solution to be dissolved by heating, and a solution A is obtained; 2, 0.1-10 mmol of a vanadium source is weighed and added into the solution A to be dissolved by heating, and a solution B is obtained; 3, the solution B is subjected to a solvothermal reaction for 1-28 h on the condition that the temperature is 160 DEG C to 220 DEG C, and a precursor is obtained; and 4, the obtained precursor is washed, centrifuged, dried and subjected to thermal treatment in an inert atmosphere, and the V2O3-C material is obtained. According to the preparation method, the specific surface area of the whole material can be increased to enable the contact area between an electrolyte solution and V2O3 to be increased, the diffusion pathof ions can be shortened, and the electrochemical performances of the V2O3-C material are improved; and the stability of the material in the long-term charging and discharging process is kept.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and electrochemistry, in particular to a method for preparing a lithium-ion battery negative electrode spherical vanadium trioxide / carbon composite material, in particular to a V 2 o 3 Spherical lithium-ion battery negative electrode composed of nanosheets V 2 o 3 / C composite material preparation method. Background technique [0002] With the process of economic globalization and the extensive use of fossil fuels, the problems of environmental pollution and energy shortage have become increasingly prominent. In order to reduce pollution during the use of fossil fuels, develop wind, light, electricity sustainable renewable energy, new power batteries and high-efficiency energy storage systems, and realize the rational allocation of renewable energy and power regulation, which is crucial to improving resource utilization efficiency, solving energy crises and Protecting the environment is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/48H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/362H01M4/48H01M10/0525H01M2004/021H01M2004/027Y02E60/10
Inventor 郑俊超肖彬张宝王鹏博汤林波安长胜
Owner CENT SOUTH UNIV
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