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Composite nanometer material for lithium ion battery and preparing method thereof

A technology of composite nanomaterials and lithium-ion batteries, applied in nanotechnology for materials and surface science, battery electrodes, nanotechnology, etc., can solve problems such as unsatisfactory charge and discharge performance, limited electron transfer speed and conductivity , to achieve the effect of improving anti-overcharge performance, good and stable cycle performance, and broad application prospects

Inactive Publication Date: 2017-02-22
GANZHOU XIONGBO NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limited electron transfer speed and conductivity of carbon, the charge and discharge performance of lithium-ion batteries at high rates is still not ideal.

Method used

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  • Composite nanometer material for lithium ion battery and preparing method thereof

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Effect test

Embodiment 1

[0024] A preparation method for a lithium-ion battery composite nanomaterial, comprising the steps of:

[0025] (1) Add 5g of tetraethyl orthosilicate to 30mL of ethanol and stir to dissolve, then add 0.5g of polyethylene glycol 2000 and ultrasonically disperse for 15min, then add 10mL of urea solution and stir at about 30°C for 1h to form a sol for later use;

[0026] (2) Take 5g vanadium oxide V0 2 Add it into 20mL hydrogen peroxide solution with a mass fraction of 5%, stir until all the vanadium oxides are dissolved to form a red peroxovanadic acid solution, continue to stir at room temperature for 1 hour and set aside;

[0027] (3) Dissolve the carbon source glucose and ferrocene in acetone to form a uniform and stable solution for later use. The amount of the carbon source added is 15g / L, and the concentration of ferrocene is 0.002mol / L; then the formed The solution is added into the reaction kettle for heat treatment, the heat treatment conditions are: temperature 180°C...

Embodiment 2

[0030] A preparation method for a lithium-ion battery composite nanomaterial, comprising the steps of:

[0031] (1) Add 10g of tetraethyl orthosilicate to 40mL of ethanol and stir to dissolve, then add 1g of polyethylene glycol 2000 and ultrasonically disperse for 15min, then add 15mL of urea solution and stir at about 30°C for 2h to form a sol for later use;

[0032] (2) Take 10g of vanadium oxide V 2 0 3 Add it into 25mL of hydrogen peroxide solution with a mass fraction of 15%, stir until all the vanadium oxides are dissolved to form a red peroxovanadic acid solution, continue to stir at room temperature for 6 h before use;

[0033](3) Dissolve the carbon source sucrose and ferrocene in ethanol to form a uniform and stable solution for later use. The amount of carbon source added is 80g / L, and the concentration of ferrocene is 0.004mol / L; then the formed The solution is added to the reaction kettle for heat treatment, the heat treatment conditions are: temperature 200 ° C...

Embodiment 3

[0036] A preparation method for a lithium-ion battery composite nanomaterial, comprising the steps of:

[0037] (1) Add 8g tetraethyl orthosilicate to 35mL ethanol and stir to dissolve, then add 0.8g polyethylene glycol 2000 and ultrasonically disperse for 15min, then add 12mL urea solution and stir at 30°C for 1.5h to form a sol for later use ;

[0038] (2) Take 8g of vanadium oxide V 2 0 5 Add it into 22mL of hydrogen peroxide solution with a mass fraction of 10%, stir until all the vanadium oxides are dissolved to form a red peroxovanadic acid solution, continue to stir at room temperature for 4 h before use;

[0039] (3) Dissolve the carbon source phenolic resin and ferrocene in acetone to form a uniform and stable solution for later use. The amount of carbon source added is 50g / L, and the concentration of ferrocene is 0.003mol / L; then the formed The solution was added into a reaction kettle for heat treatment, the heat treatment conditions were: temperature 190°C, time...

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Abstract

The invention provides a composite nanometer material for lithium ion battery and a preparing method thereof. The preparing method includes the steps that firstly, silicon-containing sol and a vanadium compound solution are obtained; secondly, a carbon material is prepared; finally, a silicon dioxide / vanadium pentoxide / carbon composite material is obtained with the one step hydro-thermal method. The material obtained with the method is granular, the partical size is 40 nm to 120 nm, the pore diameter is 30 nm to 150 nm, the pore volume is 0.5 cm<3> / g to 1.5 cm<3> / g, and the specific area is 120 m<2> / g to 300 m<2> / g. The ternary composite nanometer material serves as a whole, the electronic conduction rate of an electrode material is increased, the charging performance and discharging performance at the large multiplying power of the electrode material are enhanced, the discharging capacity of the electrode material is magnified, the heat stability of the electrode material is improved, reduction of the battery capacity is reduced, the anti-overcharging performance of the battery is improved, and the cycling service life of the electrode material is prolonged; variation of the absolute volume is small in the charging and discharging process, the composite nanometer material has the high electrochemistry lithium storage capacity and small energy losses, and application prospects are quite broad.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial application, and in particular relates to a composite nanomaterial for lithium ion batteries and a preparation method thereof. Background technique [0002] The study of nanomaterials is a frontier field in today's scientific research, and it is also a hot spot studied by many scientists all over the world. The magic and unknown aspects of nanomaterials have aroused people's widespread attention; the research and application of nanomaterials are currently hot spots and difficulties, and are also the focus of high-tech development. [0003] One-dimensional nanomaterials refer to new nanomaterials in which at least one of the three dimensions of the material falls between 1-100 nanometers, such as nanotubes, nanowires, nanorods, nanoribbons, etc. Due to the unique physical and chemical properties of one-dimensional materials compared with bulk materials, the world has attracted widespread at...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/48H01M4/587H01M4/62H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/364H01M4/483H01M4/587H01M4/625H01M10/0525Y02E60/10
Inventor 叶澄
Owner GANZHOU XIONGBO NEW ENERGY TECH CO LTD
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