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Method for preparing ultra-thin nano sheet Nh4V3O8 nano material under ultra-high pressure

A technology of nanosheets and nanomaterials, applied in nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems that nanosheets have not been reported, and achieve environmental protection in the preparation process, buffer volume changes, and increase effective connections. Effect

Active Publication Date: 2019-09-20
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, ammonium vanadate in the shape of nano flower, three-dimensional network, card, ribbon, rod, etc. has been successfully prepared by microwave method, microwave-ultraviolet assistance, microwave-ultrasound, and hydrothermal solvothermal methods. The synthesis of ultrathin nanosheets from ammonium vanadate has not yet been reported

Method used

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  • Method for preparing ultra-thin nano sheet Nh4V3O8 nano material under ultra-high pressure
  • Method for preparing ultra-thin nano sheet Nh4V3O8 nano material under ultra-high pressure
  • Method for preparing ultra-thin nano sheet Nh4V3O8 nano material under ultra-high pressure

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Preparation of ultra-thin nano flake NH by ultra-high pressure 4 V 3 O 8 The nanomaterial method includes the following steps:

[0028] Step 1: Add 0.08g of 1-methyl-3-ethylimidazole chloride to 10mL of water to dissolve, then add 0.05g of ethylenediaminetetraacetic acid and stir to form a mixed solution;

[0029] Step 2: Add 5mL of 50% ethylene glycol to the mixed solution and then add 0.3g of NH 4 VO 3 And heating to make NH 4 VO 3 Fully dissolved into NH 4 VO 3 Solution; Among them, the heating temperature is 50℃;

[0030] Step 3: Put NH 4 VO 3 The solution is microwaved in a microwave oven for 3 minutes; the power of the microwave oven is 500W;

[0031] Step 4: The NH after microwave treatment 4 VO 3 The solution was transferred to a reactor lined with polytetrachloroethylene and placed in a micro-ultra-high pressure hydrothermal reactor for hydrothermal reaction at 140°C for 6 hours to obtain a suspension; among them, the pressure in the micro-ultra-high pressure hydrotherm...

Embodiment 2

[0035] Preparation of ultra-thin nano flake NH by ultra-high pressure 4 V 3 O 8 The nanomaterial method includes the following steps:

[0036] Step 1: Add 0.15g of 1-methyl-3-ethylimidazole chloride to 10mL of water to dissolve, and then add 0.1g of ethylenediaminetetraacetic acid and stir to form a mixed solution;

[0037] Step 2: Add 10 mL of 50% glycerol to the mixed solution and then add 0.5 g of NH 4 VO 3 And heating to make NH 4 VO 3 Fully dissolved into NH 4 VO 3 Solution; Among them, the heating temperature is 40℃;

[0038] Step 3: Put NH 4 VO 3 The solution is microwaved in a microwave oven for 4 minutes; the power of the microwave oven is 600W;

[0039] Step 4: The NH after microwave treatment 4 VO 3 The solution was transferred to a reactor lined with polytetrachloroethylene and placed in a micro ultrahigh pressure hydrothermal reactor for 4h hydrothermal reaction at 150℃ to obtain a suspension; among them, the pressure in the micro ultrahigh pressure hydrothermal reactor wa...

Embodiment 3

[0042] Preparation of ultra-thin nano flake NH by ultra-high pressure 4 V 3 O 8 The nanomaterial method includes the following steps:

[0043] Step 1: Add 0.2g of 1-methyl-3-ethylimidazole chloride to 10mL of water to dissolve, and then add 0.1g of ethylenediaminetetraacetic acid and stir to form a mixed solution;

[0044] Step 2: Add 6mL of 50% methanol to the mixed solution and then add 0.43g of NH 4 VO 3 And heating to make NH 4 VO 3 Fully dissolved into NH 4 VO 3 Solution; Among them, the heating temperature is 30℃;

[0045] Step 3: Put NH 4 VO 3 The solution is microwaved in a microwave oven for 2 minutes; the power of the microwave oven is 700W;

[0046] Step 4: The NH after microwave treatment 4 VO 3 The solution was transferred to a reactor lined with polytetrachloroethylene and placed in a micro ultra-high pressure hydrothermal reactor for hydrothermal reaction at 170°C for 5 hours to obtain a suspension; among them, the pressure in the micro ultra-high pressure hydrothermal r...

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Abstract

The invention discloses a method for preparing an ultra-thin nanosheet-shaped NH4V3O8 nano material under ultra-high pressure. The method comprises: step 1: adding 1-methyl-3-ethylimidazolium chloride to water, and adding ethylenediaminetetraacetic acid to form a solution mixture; step 2: adding a solvent to the solution mixture, then adding NH4VO3, and dissolving the NH4VO3 to obtain a NH4VO3 solution; step 3: performing microwave treatment on the NH4VO3 solution in a microwave generator; step 4: transferring the microwave treated NH4VO3 solution to a reaction vessel, and placing the reaction vessel in an ultra-high pressure hydrothermal reactor for hydrothermal reaction to obtain suspension; and step 5: centrifugally separating the suspension to obtain powder, washing and drying the powder to obtain the ultra-thin nanosheet-like NH4V3O8 nanomaterial. The prepared nanosheet-like NH4V3O8 material has high cycle stability and high current charge and discharge capacity when used as a positive electrode material for lithium ion batteries.

Description

Technical field [0001] The invention belongs to the technical field of inorganic nano material preparation, and relates to an ultra-thin nano-sheet NH prepared by ultra-high pressure 4 V 3 O 8 Nanomaterials method. Background technique [0002] Lithium-ion batteries have the characteristics of high working voltage, high energy density, long cycle life and no self-discharge. With the development of society, the performance requirements for lithium-ion batteries are becoming higher and higher. The current battery capacity is small and the power is low. For example, in electric-driven new energy vehicles, the requirements for charging speed, cruising range and cost factors are increasing year by year. Therefore, there is an urgent need to develop lithium-ion batteries with high capacity, high current density, and high power. [0003] Vanadium is a multivalent metal element in transition metals, which can form oxides and composite oxides with oxygen or other cations and oxygen, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G31/00H01M4/48B82Y40/00B82Y30/00
CPCB82Y30/00B82Y40/00C01G31/00C01P2002/72C01P2004/03C01P2006/40H01M4/48Y02E60/10
Inventor 曹丽云寇领江黄剑锋梶芳浩二王勇冯亮亮
Owner SHAANXI UNIV OF SCI & TECH
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