A method for preparing ultra-thin nanosheet-shaped nh4v3o8 nanomaterials by ultra-high pressure

A nano-sheet, nano-material technology, applied in nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of unreported nanosheets, achieve environmental protection in the preparation process, short diffusion paths, and improve the electrochemical window. Effect

Active Publication Date: 2021-06-15
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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  • A method for preparing ultra-thin nanosheet-shaped nh4v3o8 nanomaterials by ultra-high pressure
  • A method for preparing ultra-thin nanosheet-shaped nh4v3o8 nanomaterials by ultra-high pressure
  • A method for preparing ultra-thin nanosheet-shaped nh4v3o8 nanomaterials by ultra-high pressure

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Experimental program
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Effect test

Embodiment 1

[0027] A kind of ultra-high pressure preparation of ultra-thin nanosheet NH 4 V 3 o 8 A method for nanomaterials, comprising the steps of:

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

[0029] Step 2: Add 5mL of ethylene glycol with a volume fraction of 50% to the mixed solution and then add 0.3g of NH 4 VO 3 and heated to make NH 4 VO 3 fully dissolved NH 4 VO 3 solution; wherein, the heating temperature is 50°C;

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

[0031] Step 4: Microwave the NH 4 VO 3 The solution was transferred to a reaction kettle lined with polytetrachlorethylene and placed in a micro ultra-high pressure hydrothermal reactor for hydrothermal reaction at 140°C for 6 hours to obtain a suspension; wherein, the pressure in the...

Embodiment 2

[0035] A kind of ultra-high pressure preparation of ultra-thin nanosheet NH 4 V 3 o 8 A method for nanomaterials, comprising the steps of:

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

[0037] Step 2: Add 10 mL of glycerol with a volume fraction of 50% to the mixed solution and then add 0.5 g of NH 4 VO 3 and heated to make NH 4 VO 3 fully dissolved NH 4 VO 3 solution; wherein, the heating temperature is 40°C;

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

[0039] Step 4: Microwave the NH 4 VO 3 The solution was transferred to a reaction kettle lined with polytetrachlorethylene and placed in a micro ultra-high pressure hydrothermal reactor for hydrothermal reaction at 150°C for 4 hours to obtain a suspension; wherein, the pressure in the micro...

Embodiment 3

[0042] A kind of ultra-high pressure preparation of ultra-thin nanosheet NH 4 V 3 o 8 A method for nanomaterials, comprising the steps of:

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

[0044] Step 2: Add 6 mL of methanol with a volume fraction of 50% to the mixed solution and then add 0.43 g of NH 4 VO 3 and heated to make NH 4 VO 3 fully dissolved NH 4 VO 3 solution; wherein, the heating temperature is 30°C;

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

[0046] Step 4: Microwave the NH 4 VO 3 The solution was transferred to a reaction kettle lined with polytetrachlorethylene and placed in a micro ultra-high pressure hydrothermal reactor for hydrothermal reaction at 170°C for 5 hours to obtain a suspension; wherein, the pressure in th...

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Abstract

The invention discloses an ultra-high pressure preparation of ultra-thin nano-sheet NH 4 V 3 o 8 The method of nanomaterials, step 1: adding 1-methyl-3-ethylimidazole chloride to water for dissolution, then adding ethylenediaminetetraacetic acid to form a mixed solution; step 2: adding a solvent to the mixed solution and then adding NH 4 VO 3 and dissolved to NH 4 VO 3 solution; step 3: the NH 4 VO 3 The solution was microwaved in a microwave generator; step 4: the microwaved NH 4 VO 3 The solution is transferred to a reaction kettle and placed in an ultra-high pressure hydrothermal reactor for hydrothermal reaction to obtain a suspension; step 5: centrifuge the suspension to obtain a powder, wash and dry the powder to obtain ultra-thin nanosheets NH 4 V 3 o 8 Nanomaterials; sheet-like NH prepared therefrom 4 V 3 o 8 When nanomaterials are used as cathode materials for lithium-ion batteries, they have the characteristics of high cycle stability and high high-current charge-discharge capacity.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic nano-materials, and relates to an ultra-high pressure preparation of ultra-thin nano-flaky NH 4 V 3 o 8 methods for nanomaterials. 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 getting 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, mileage 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(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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