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Vanadium oxide ultra-thin nanobelt with embedded ions and preparation method and application thereof

A technology of vanadium oxide, ion intercalation

Active Publication Date: 2015-10-28
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In recent years, the synthesis of vanadium oxides with micro-nano structure has become a major research hotspot by obtaining shorter ion / electron transport paths to improve their electrochemical kinetic performance, but this one-step hydrothermal method realizes ion-intercalated vanadium oxidation. The method of producing ultrathin nanoribbons has not yet been reported

Method used

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  • Vanadium oxide ultra-thin nanobelt with embedded ions and preparation method and application thereof
  • Vanadium oxide ultra-thin nanobelt with embedded ions and preparation method and application thereof
  • Vanadium oxide ultra-thin nanobelt with embedded ions and preparation method and application thereof

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Embodiment 1

[0037] A method for preparing an ion-embedded vanadium oxide ultrathin nanoribbon, comprising the steps of:

[0038] 1) Weigh 0.1mmol iron acetylacetonate and dissolve it in deionized water, wherein the amount of iron acetylacetonate is the same as the V that is about to be added in step 2). 2 o 5 sol corresponds proportionally to each mole of V 2 o 5 The sol corresponds to 0.1mmol iron acetylacetonate, fully stirred to dissolve;

[0039] 2) Slowly add 1 mmol of vanadium pentoxide sol to the solution obtained in step 1), that is, the concentration of vanadium pentoxide in the solution is 0.017mol / L, and fully stir;

[0040] 3) Transfer the solution obtained in step 2) into a reaction kettle, heat at 180° C. for 48 hours, take out the reaction kettle, and naturally cool to room temperature;

[0041] 4) centrifuging the product obtained in step 3), collecting the precipitate and repeatedly washing the precipitate with water and absolute ethanol;

[0042] 5) disperse the pre...

Embodiment 2

[0049] A method for preparing an ion-embedded vanadium oxide ultrathin nanoribbon, comprising the steps of:

[0050] 1) Weigh 0.05mmol calcium acetylacetonate and dissolve it in deionized water, wherein the amount of calcium acetylacetonate is the same as that of V that is about to be added in step 2). 2 o 5 sol corresponds proportionally to each mole of V 2 o 5 The sol corresponds to 0.05 calcium acetylacetonate, fully stirred to dissolve;

[0051] 2) Slowly add 1 mmol of vanadium pentoxide sol to the solution obtained in step 1), that is, the concentration of vanadium pentoxide in the solution is 0.017mol / L, and fully stir;

[0052] 3) Transfer the solution obtained in step 2) into a reaction kettle, heat at 200° C. for 24 hours, take out the reaction kettle, and naturally cool to room temperature;

[0053] 4) centrifuging the product obtained in step 3), collecting the precipitate and repeatedly washing the precipitate with water and absolute ethanol;

[0054] 5) dispe...

Embodiment 3

[0059] A method for preparing an ion-embedded vanadium oxide ultrathin nanoribbon, comprising the steps of:

[0060] 1) Weigh 1mmol molybdenum acetylacetonate and dissolve it in deionized water, wherein the amount of molybdenum acetylacetonate is the same as that of the V that will be added in step 2) 2 o 5 sol corresponds proportionally to each mole of V 2 o 5 The sol corresponds to 1 mmol of molybdenum acetylacetonate, fully stirred to dissolve;

[0061] 2) Slowly add 1 mmol of vanadium pentoxide sol to the solution obtained in step 1), that is, the concentration of vanadium pentoxide in the solution is 0.017mol / L, and fully stir;

[0062] 3) Transfer the solution obtained in step 2) into a reaction kettle, heat at 200° C. for 24 hours, take out the reaction kettle, and naturally cool to room temperature;

[0063] 4) centrifuging the product obtained in step 3), collecting the precipitate and repeatedly washing the precipitate with water and absolute ethanol;

[0064] 5...

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Abstract

The invention relates to a vanadium oxide ultra-thin nanobelt with embedded ions and a preparation method thereof. The vanadium oxide ultra-thin nanobelt can be used as positive electrode active materials, with good rate capability, of a sodium-ion battery, metal ions are embedded into crystal layer-shaped structural layers of vanadium oxide, the interlayer spacing is controlled to range from 9.6 angstroms to 10.9 angstroms, the length of the vanadium oxide ultra-thin nanobelt ranges from 10 microns to 100 microns, the width of the vanadium oxide ultra-thin nanobelt ranges from 0.5 micron to 3 microns, and the thickness of the vanadium oxide ultra-thin nanobelt ranges from 5 nanometers to 20 nanometers. The vanadium oxide ultra-thin nanobelt with the embedded ions and the preparation method thereof have the advantages that based on the synergistic effect between the ultra-thin nanobelt structure and the metal ions embedded into the crystal structural layers, the vanadium oxide ultra-thin nanobelt material with the embedded ions is synthesized through the hydrothermal process and the freeze drying and vacuum drying processes; when the vanadium oxide ultra-thin nanobelt with the embedded ions is used as the positive electrode active materials of the sodium-ion battery, the excellent cycling property and high-rate capability of the nano material are achieved, and the vanadium oxide ultra-thin nanobelt with the embedded ions is a high-performance potential application material for the sodium-ion battery; the technology is simple, the requirements of green chemistry are met, and the requirement for equipment is low.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and electrochemistry, and in particular relates to an ion-embedded vanadium oxide ultrathin nanobelt and a preparation method thereof. The material can be used as a positive electrode active material of a sodium ion battery with good rate performance. Background technique [0002] With the improvement of living standards, portable devices such as mobile phones, digital cameras, and notebook computers have become an important part of our lives. Lithium battery is one of the most potential energy storage systems, and it has been widely concerned and used because of its high energy density and long cycle life. In recent years, with the rapid development of large-scale equipment such as pure electric vehicles and hybrid vehicles, lithium-ion batteries have been gradually put into use because of their high energy and power density and environmental friendliness. Therefore, the demand for lithium...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/48B82Y30/00
CPCB82Y30/00H01M4/483H01M10/054Y02E60/10
Inventor 韩春华麦立强蒋周阳魏湫龙
Owner WUHAN UNIV OF TECH
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