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Variable ingredient vanadium oxide nanometer belt as well as synthesis method and application thereof

A synthesis method and nanobelt technology, applied in the field of variable composition vanadium oxide nanobelt and its synthesis, to achieve good cycle performance, high lithium intercalation capacity, and simple equipment requirements

Inactive Publication Date: 2018-12-11
YUNNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the synthesis of the above-mentioned nano-vanadium oxide materials, many technologies are involved, such as physical / chemical vapor deposition, electrospinning, electrodeposition, reverse micelles, sol-gel, hydrothermal and template methods in various wet chemical environments, etc. But in the described method, a lot of use precise equipment, loaded down with trivial details preparation process and harsher conditions such as high pressure, vacuum

Method used

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  • Variable ingredient vanadium oxide nanometer belt as well as synthesis method and application thereof
  • Variable ingredient vanadium oxide nanometer belt as well as synthesis method and application thereof
  • Variable ingredient vanadium oxide nanometer belt as well as synthesis method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1. Solification of vanadium oxide

[0040] will be 0.92 g V 2 o 5 The powder is dispersed in 50ml of deionized aqueous solution, and mixed with hydrogen peroxide (30% mass concentration) at a mass / volume ratio of 1 / 3 (g / ml), fully reacted with magnetic stirring at room temperature, and forms orange after 3 hours Yellow vanadium oxide sol.

[0041] Second, with V 3 o 7 ·H 2 Preparation of one-dimensional nanobelts with O as the main component

[0042] Take 0.25ml of absolute ethanol and add it to the above vanadium oxide sol, move it into a 100ml hydrothermal reaction kettle after magnetic stirring and mixing, and after 2 days of 150℃ hydrothermal reaction, centrifuge, wash and dry to obtain V 3 o 7 ·H 2 One-dimensional vanadium oxide nanoribbons with O as the main component.

[0043] The detection structures of the obtained substances are shown in Figure 1(a), Figure 2(a) and Figure 3(a1), Figure 3(a2), and the electrochemical performance is shown in Figure 4(a...

Embodiment 2

[0051] 1. Solification of vanadium oxide

[0052] will 1.82 g V 2 o 5 The powder is dispersed in 75ml of deionized aqueous solution, and mixed with hydrogen peroxide (30% mass concentration) at a mass / volume ratio of 1 / 2.76 (g / ml), fully reacted with magnetic stirring at room temperature, and forms orange after 4 hours Yellow vanadium oxide sol.

[0053] Second, with V 3 o 7 ·H 2 Preparation of one-dimensional nanobelts with O as the main component

[0054] Take 0.2ml of absolute ethanol and add it to the vanadium oxide sol, mix it with magnetic force and move it into a 100ml hydrothermal reaction kettle. After 2 days of 180℃ hydrothermal reaction, centrifuge, wash and dry to obtain 3 o 7 ·H 2 One-dimensional vanadium oxide nanoribbons with O as the main component.

[0055] Three, with VO 2 Fabrication of 1D nanobelts as main components

[0056] Take 2.0ml of absolute ethanol and add it to the vanadium oxide sol obtained at the beginning, and add 0.2 grams of multi-...

Embodiment 3

[0060] 1. Solification of vanadium oxide

[0061] will 1.38 g V 2 o 5 The powder is dispersed in 140ml of deionized aqueous solution, and mixed with hydrogen peroxide (30% mass concentration) at a mass / volume ratio of 1 / 20 (g / ml), fully reacted with magnetic stirring at room temperature, and forms orange after 5 hours Yellow vanadium oxide sol.

[0062] Second, with V 3 o 7 ·H 2 Preparation of one-dimensional nanobelts with O as the main component

[0063] Take 0.25ml of absolute ethanol and add it to the vanadium oxide sol, mix it with magnetic force and move it into a 200ml hydrothermal reaction kettle. After 4 days of hydrothermal reaction at 170°C, centrifuge, wash and dry to obtain 3 o 7 ·H 2 One-dimensional vanadium oxide nanoribbons with O as the main component.

[0064] Three, with VO 2 Fabrication of 1D nanobelts as main components

[0065] Get 2.5ml of absolute ethanol and add in the vanadium oxide sol obtained at the beginning, add 0.14 grams of multi-wal...

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Abstract

The invention belongs to the field of a nanometer energy storage material, and particularly relates to a variable ingredient vanadium oxide nanometer belt as well as a synthesis method and applicationthereof. Precursor vanadium oxide sol and absolute ethyl alcohol take hydro-thermal reaction; or in the hydro-thermal reaction, reduction induction substances of carbon nanometer tubes are also added; or after the hydro-thermal reaction, sintering is performed. Through different reaction composition, a one-dimensional nanometer belt using V3O7.H2O, VO2 and V2O5 as major ingredients is obtained. When the one-dimensional nanometer belt product is used as a positive electrode active material of a rechargeable lithium-ion battery, excellent electric chemical lithium storage function is shown; thespecific volume is obviously higher than that of a conventional lithium-ion battery positive electrode material. The method has the advantages that through hydro-thermal reaction and post sintering treatment, the synthesis of the variable-ingredient one-dimensional vanadium oxide nanometer belt is realized; the process is simple; the yield is high; the regulation and control are easy.

Description

technical field [0001] The invention belongs to the field of nanometer energy storage materials, and in particular relates to a variable composition vanadium oxide nanobelt and its synthesis method and application. Background technique [0002] In the current era, energy and environmental issues are getting more and more attention. With the depletion of traditional non-renewable fossil energy sources, finding new alternative energy sources and corresponding energy storage systems has always been the goal of many researchers. Lithium-ion battery is an important energy storage unit, which has been used in various portable electronic devices and power tools, such as mobile phones, notebook computers and electric vehicles. It has become an indispensable power supply in people's daily production and life. energy carrier. However, its performance cannot meet the requirements of various new functional devices at present, so continuously improving the performance of lithium-ion ba...

Claims

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Application Information

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IPC IPC(8): C01G31/02B82Y40/00H01M4/48H01M10/0525
CPCB82Y40/00C01G31/02C01P2002/72C01P2004/03C01P2004/17C01P2006/40C01P2006/60H01M4/48H01M10/0525Y02E60/10
Inventor 周小卫姜宇涵陈旭文佳关琳琳任杨刘铸
Owner YUNNAN UNIV
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