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Three-dimensional hierarchical heterostructure nano-material, and gradient hydro-thermal preparation method and application thereof

A technology of heterostructures and nanomaterials, applied in nanotechnology, nanotechnology, structural parts, etc., can solve the problem of difficulty in obtaining three-dimensional heterostructured nanostructures, and achieve large specific surface area, reduced damage, and excellent electrochemical performance. Effect

Active Publication Date: 2015-07-15
安徽国芯新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is difficult to obtain 3D heterogeneous nanostructures through a one-step hydrothermal process

Method used

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  • Three-dimensional hierarchical heterostructure nano-material, and gradient hydro-thermal preparation method and application thereof
  • Three-dimensional hierarchical heterostructure nano-material, and gradient hydro-thermal preparation method and application thereof
  • Three-dimensional hierarchical heterostructure nano-material, and gradient hydro-thermal preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0044] 1) Weigh 0.14g ammonium metavanadate and 0.25g citric acid monohydrate, add 35mL deionized water, stir for about one minute to form a uniform transparent yellow solution;

[0045] 2) Add 0.5 g of sodium lauryl sulfate to the solution in step 1), and magnetically stir it in a constant temperature water bath at 50° C. for 4 hours to dissolve it and form a transparent and uniform dark blue solution;

[0046] 3) Take out the precursor solution obtained in step 2) from the water bath and let it stand for 1 min, transfer it to a 50mL reaction kettle, and conduct a hydrothermal reaction in a constant temperature oven at 180°C for 24 hours;

[0047] 4) After the reaction kettle in step 3) is naturally cooled to room temperature, pour off the upper layer solution, obtain the black precipitate at the bottom, wash and centrifuge;

[0048] 5) drying the sample obtained in step 4) in a vacuum oven at 70°C for 6 hours;

[0049] 6) Calcining the dried sample in step 5) at a heating r...

Embodiment 2

[0058] 1) Weigh 0.14g ammonium metavanadate and 0.25g citric acid monohydrate, add 35mL deionized water, stir for about one minute to form a uniform transparent yellow solution;

[0059] 2) Add 0.1 g of sodium lauryl sulfate to the solution in step 1), and magnetically stir it in a constant temperature water bath at 50°C for 4 hours to dissolve it and form a transparent and uniform dark blue solution;

[0060] 3) Take out the precursor solution obtained in step 2) from the water bath and let it stand for 1 minute, transfer it to a 50mL reaction kettle, and conduct a hydrothermal reaction in a constant temperature oven at 180°C for 24 hours;

[0061] 4) After the reaction kettle in step 3) is naturally cooled to room temperature, pour off the upper layer solution, obtain the black precipitate at the bottom, wash and centrifuge;

[0062] 5) drying the sample obtained in step 4) in a vacuum oven at 70°C for 6 hours;

[0063] 6) Calcining the dried sample in step 5) at a heating ...

Embodiment 3

[0066] 1) Weigh 0.14g ammonium metavanadate and 0.25g citric acid monohydrate, add 35mL deionized water, stir for about one minute to form a uniform transparent yellow solution;

[0067] 2) Add 0.3 g of sodium lauryl sulfate to the solution in step 1), and magnetically stir it in a constant temperature water bath at 50° C. for 4 hours to dissolve it and form a transparent and uniform dark blue solution;

[0068] 3) Take out the precursor solution obtained in step 2) from the water bath and let it stand for 1 minute, transfer it to a 50mL reaction kettle, and conduct a hydrothermal reaction in a constant temperature oven at 180°C for 24 hours;

[0069] 4) After the reaction kettle in step 3) is naturally cooled to room temperature, pour off the upper layer solution, obtain the black precipitate at the bottom, wash and centrifuge;

[0070] 5) drying the sample obtained in step 4) in a vacuum oven at 70°C for 6 hours;

[0071] 6) Calcining the dried sample in step 5) at a heatin...

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Abstract

The invention relates to a three-dimensional hierarchical heterostructure nano-material and a gradient hydro-thermal preparation method thereof. The nano-material can be used as an electrode material for a lithium ion battery or a material for other electrochemical devices and is prepared by growing secondary structure vanadate nanorods or nanoparticles on microspheres formed by enclosure of vanadium oxide nanosheets. The invention has the following beneficial effects: the three-dimensional hierarchical heterostructure obtained in the invention has uniform morphology and a great specific surface area, exerts an effective buffering effect during intercalation and deintercalation of ions, reduces damage to a primary structure and has superior electrochemical performance; the prepared nano-material shows excellent electrochemical performance when used as the electrode material for the lithium ion battery or the material for other electrochemical devices; and the method provides a strategy for preparation of a hierarchical heterostructure, has certain universality and shows potential for large scale application.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and electrochemical devices, and specifically relates to a three-dimensional hierarchical heterostructure nanomaterial and a gradient hydrothermal preparation method thereof. The nanomaterial can be used as an electrode material in a lithium ion battery or a material for other electrochemical devices . Background technique [0002] Three-dimensional hierarchical heterostructure nanomaterials are widely used in catalysts, energy storage and other fields due to their synergistic effect, large specific surface area, better structural stability and more active sites. The existing preparation methods, such as vapor phase deposition and microemulsion, etc., seriously limit the further development and application due to the complex and difficult-to-control process of constructing heterostructures. [0003] Hydrothermal method is a method for synthesizing nanomaterials, which has attracted much att...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/485H01M4/48B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/139H01M4/48H01M4/483H01M4/485H01M10/0525Y02E60/10
Inventor 麦立强牛朝江刘熊孟甲申
Owner 安徽国芯新材料股份有限公司
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