VO2(B)/carbon cloth self-supporting material as well as preparation method and application thereof

A self-supporting, VO2 technology, applied in the field of nanomaterials and electrochemistry, can solve the problems of increasing VO2 polarization, reducing the electronic conductivity of active materials, degrading the electrochemical performance of electrode materials, etc., achieving excellent cycle stability and facilitating marketization Promotional, easy-to-magnify effects

Inactive Publication Date: 2021-03-02
HUAZHONG AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Zn 2+ There is a strong electrostatic interaction with the interlayer structure during the de-intercalation process, which increases the VO 2 The polarization during the electrochemical process eventually leads to the collapse of the host structure
In addition, Zn during the electrochemical reaction

Method used

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  • VO2(B)/carbon cloth self-supporting material as well as preparation method and application thereof
  • VO2(B)/carbon cloth self-supporting material as well as preparation method and application thereof
  • VO2(B)/carbon cloth self-supporting material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] VO 2 (B) The preparation method of carbon cloth self-supporting material, it comprises the steps:

[0029] 1) 0.3638g vanadium pentoxide (V 2 o 5 ) and 0.7564g oxalic acid (C 2 h 2 o 4 2H 2 O) add 12mL of distilled water, and react under the condition of heating in a water bath at 75° C. to obtain a blue clear solution;

[0030] 2) Add 3mL of 30% H 2 o 2 solution, stir well;

[0031] 3) Add 65mL of absolute ethanol and stir evenly to obtain a precursor solution;

[0032]4) Transfer the precursor solution obtained in step 3) to the reactor, and put it into carbon cloth for hydrothermal reaction. The hydrothermal temperature is 180°C, and the hydrothermal time is 100 minutes;

[0033] 5) The obtained active material was washed several times with pure water, and then dried in a vacuum oven at 60°C to finally obtain VO 2 (B) / Carbon cloth self-supporting material.

[0034] With the product VO of the present invention 2 (B) / Carbon cloth self-supporting material ...

Embodiment 2

[0039] VO 2 (B) The preparation method of carbon cloth self-supporting material, it comprises the steps:

[0040] 1) 0.3638g vanadium pentoxide (V 2 o 5 ) and 0.7564g oxalic acid (C 2 h 2 o 4 2H 2 O) adding 12mL of distilled water, reacting under the condition of heating in a water bath at 70°C to obtain a blue clear solution;

[0041] 2) Add 3mL of 30% H 2 o 2 solution, stir well;

[0042] 3) Add 65mL of absolute ethanol and stir evenly to obtain a precursor solution;

[0043] 4) Transfer the precursor solution obtained in step 3) to a reaction kettle, and put carbon cloth into it for hydrothermal reaction. The hydrothermal temperature is 170°C, and the hydrothermal time is 90 minutes;

[0044] 5) The obtained active material was washed several times with pure water, and then dried in a vacuum oven at 70°C to finally obtain VO 2 (B) / Carbon cloth self-supporting material.

[0045] VO obtained in this example 2 (B) / carbon cloth self-supporting material as an examp...

Embodiment 3

[0047] VO 2 (B) The preparation method of carbon cloth self-supporting material, it comprises the steps:

[0048] 1) 0.3638g vanadium pentoxide (V 2 o 5 ) and 0.7564g oxalic acid (C 2 h 2 o 4 2H 2 O) adding 12mL of distilled water, reacting under the condition of heating in a water bath at 80°C to obtain a blue clear solution;

[0049] 2) Add 3mL of 30% H 2 o 2 solution, stir well;

[0050] 3) Add 65mL of absolute ethanol and stir evenly to obtain a precursor solution;

[0051] 4) Transfer the precursor solution obtained in step 3) to a reaction kettle, and put carbon cloth into it for hydrothermal reaction. The hydrothermal temperature is 190°C, and the hydrothermal time is 80 minutes;

[0052] 5) The obtained active material was washed several times with pure water, and then dried in a vacuum oven at 80°C to finally obtain VO 2 (B) / Carbon cloth self-supporting material.

[0053] VO obtained in this example 2 (B) / carbon cloth self-supporting material as an examp...

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Abstract

The invention relates to a VO2(B)/carbon cloth self-supporting material as well as a preparation method and application thereof. The VO2(B)/carbon cloth self-supporting material is directly obtained through adopting a one-time hydrothermal method, the prepared VO2(B) is of a nanosheet structure, the width of nanosheets is 100-300 nm, the sizes of the nanosheets are uniform, and loads on carbon cloth are very uniform. The preparation method comprises the following steps of: firstly, adding vanadic oxide and oxalic acid into distilled water, and reacting them under a water bath heating conditionto obtain a blue clear solution; adding a H2O2 solution with the mass fraction of 30% into the blue clear solution, and uniformly stirring the mixture; adding absolute ethyl alcohol into the mixture,and uniformly stirring the mixture; transferring the obtained precursor solution into a reaction kettle, and putting carbon cloth for hydrothermal reaction; and cleaning the obtained active materialwith pure water for multiple times, and drying in a vacuum drying oven to finally obtain the VO2(B)/carbon cloth self-supporting zinc ion battery positive electrode material. The preparation method has the advantages of simple process, mild reaction conditions and excellent electrochemical performance of the material.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials and electrochemistry, and specifically relates to a controllable preparation method and application of a B-phase vanadium dioxide / carbon cloth self-supporting material, which can be used as a positive electrode active material of a zinc ion battery. Background technique [0002] With the continuous advancement of the industrialization process, environmental pollution has become an inevitable problem that the whole world must face. Therefore, the development and use of clean and green energy that does not emit pollutants has become a strategic goal of all countries. With the improvement of new energy development technology, solar energy, wind energy, water energy and other renewable new energy sources are becoming an important part of the energy industry. However, due to the unstable characteristics of renewable energy, if it is directly integrated into the grid, it will have a great im...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/48H01M4/583H01M4/62H01M10/054
CPCH01M4/366H01M4/48H01M4/583H01M4/625H01M10/054Y02E60/10
Inventor 罗艳珠陶园学汪圣尧陈浩
Owner HUAZHONG AGRI UNIV
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