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Preparation method and application of TiO2(B)@RGO aerogel negative electrode material

A negative electrode material and airgel technology, which is applied in the preparation and application of TiO2(B)@RGO airgel negative electrode materials, can solve the problems of fossil energy shortage and fossil energy depletion, achieve high specific capacity and increase contact area , the effect of good rate performance

Inactive Publication Date: 2020-10-13
SOUTHWEST UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, the reserves of fossil energy are getting less and less, and excessive exploitation will lead to the depletion of fossil energy; Sustainable and pollution-free clean energy is imminent

Method used

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  • Preparation method and application of TiO2(B)@RGO aerogel negative electrode material
  • Preparation method and application of TiO2(B)@RGO aerogel negative electrode material
  • Preparation method and application of TiO2(B)@RGO aerogel negative electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] TiO of Example 1 2 (B) Preparation of @RGO airgel material, including the following steps:

[0040] 1) A certain amount of titanium trichloride solution (TiCl 3 ), deionized water was added to the ethylene glycol solution in sequence, and stirred for 2 minutes to obtain a uniformly mixed lavender solution;

[0041] 2) Transfer the lavender solution to a 50ml polytetrafluoroethylene autoclave for solvothermal reaction;

[0042] 3) After the reaction, perform centrifugal washing, and then dry in an oven to obtain TiO 2 (B) powder;

[0043] 4) TiO will be obtained 2 (B) The powder is placed in a tube furnace to remove residual organic molecules on the surface;

[0044] 5) Weigh a certain amount of graphite powder, K 2 S 2 o 8 and P 2 o 5 Add it into a 50ml beaker, slowly add a certain amount of concentrated sulfuric acid into the beaker and keep stirring, and dry it in a vacuum drying oven to obtain pre-oxidized graphite powder;

[0045] 6) Centrifuge and wash t...

Embodiment 2

[0059] TiO of Example 2 2 (B) The preparation and application of @RGO airgel as a negative electrode material for lithium-ion batteries, including the following steps:

[0060] 1) Take the TiO prepared in Example 1 2 (B) @RGO airgel is used as an active material, acetylene black and binder polyvinylidene fluoride (PVDF) are weighed in a mass ratio of 8:1:1, placed in a mortar and ground evenly, and then an appropriate amount of 1-methyl-2-pyrrolidone (NMP), grind it into a uniform paste and apply it on an area of ​​about 1cm 2 on the copper sheet substrate, and placed in a vacuum oven to dry at 120°C for 12 hours to obtain a negative electrode sheet;

[0061] 2) Half-cell assembly: Assemble the button battery with the positive electrode material (lithium sheet), separator and negative electrode sheet made in step (1). The model of the button battery used is CR2032, the model of the separator is Celgard2400, and the electrolyte is 1mol / LiPF of L 6 The solution is an electr...

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Abstract

The invention discloses a preparation method and application of a TiO2(B)@RGO aerogel composite material as a lithium ion battery negative electrode material. Flower-ball-shaped TiO2(B) and graphene oxide are prepared by using a solvothermal method and an improved Hummers method, the flower-ball-shaped TiO2(B) with the graphene oxide are uniformly mixed by using an ultrasonic-assisted mixing method, and a TiO2(B)@RGO hydrogel composite material is synthesized under the action of a reducing agent; and freeze-drying is performed to obtain the TiO2(B)@RGO aerogel composite material, and the TiO2(B)@RGO aerogel is used as the lithium ion battery negative electrode material to undergo an electrochemical test. The TiO2(B)@RGO aerogel prepared by the method provided by the invention has good specific capacity and rate capability.

Description

technical field [0001] The invention relates to the preparation and application of a TiO2(B)@RGO airgel composite material as a lithium-ion battery negative electrode material. Background technique [0002] With the development of society, people's demand for energy is increasing day by day. On the one hand, the reserves of fossil energy are getting less and less, and excessive exploitation will lead to the depletion of fossil energy; Sustainable and pollution-free clean energy is imminent. At present, lithium-ion batteries have received extensive research and attention as energy supply devices. [0003] As a representative of new energy, lithium-ion batteries have incomparable advantages compared with traditional fossil energy sources, namely: lithium is rich in the earth's crust, which can satisfy people's long-term use; lithium-ion batteries will not cause environmental pollution during use. Pollution; lithium-ion batteries can be reused for a long time. Lithium-ion b...

Claims

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Application Information

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IPC IPC(8): C01G23/047C01B32/19H01M4/36H01M4/48H01M4/62H01M10/0525
CPCC01G23/047C01B32/19H01M4/362H01M4/483H01M4/625H01M4/628H01M10/0525C01P2002/72C01P2004/03C01P2002/85C01P2006/40H01M2004/021H01M2004/027Y02E60/10
Inventor 王强何峻
Owner SOUTHWEST UNIVERSITY