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Preparation method and application of Nb2O5 nanorod

A nanorod and reactor technology, applied in nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of cumbersome synthesis methods, poor uniformity of nanorods, and harsh instrument requirements, and achieve shortening of ion diffusion paths and nanorods. The effect of uniform structure and fast charging and discharging process

Active Publication Date: 2020-06-05
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As another example, in 2018, Yan Haibo et al. used potassium fluoroniobate as the source of niobium, and prepared Nb by hydrothermal method. 2 o 5 , although this method uses a single reagent, the temperature required in the process is too high, and the requirements for the instrument are more stringent
Overall, the current Nb 2 o 5 The synthesis method of nanorods is generally cumbersome and has the characteristics of high cost or high energy consumption, and the synthesized Nb 2 o 5 Nanorods have poor uniformity
This to some extent restricts the Nb 2 o 5 Application and popularization of nanorods in industrial production

Method used

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  • Preparation method and application of Nb2O5 nanorod
  • Preparation method and application of Nb2O5 nanorod
  • Preparation method and application of Nb2O5 nanorod

Examples

Experimental program
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Embodiment 1

[0043] A kind of Nb provided by this embodiment 2 O 5 The preparation method of nanorod, comprises the following steps:

[0044] (1) First, 2 g Nb 2 AlC was placed in 20ml mass fraction concentration of 50% hydrofluoric acid, and etched at room temperature for 90 hours;

[0045](2) Centrifuge the etched liquid in step (1) and wash it repeatedly with deionized water and absolute ethanol until the pH is 6;

[0046] (3) Pour off the supernatant liquid of the product obtained in step (2), remove the lower layer of precipitate and place it in a vacuum drying oven to dry to obtain multi-layer MXenes;

[0047] (4) The multilayer niobium-based MXenes obtained in step (3) were placed in a tetramethylammonium hydroxide solution, and heated and stirred at 25 °C for 24 hours;

[0048] (5) Centrifuge the solution obtained in step (4) with a centrifuge, pour out the upper layer liquid obtained for the first time, add deionized water to the centrifuge tube, and then sonicate or shake vig...

Embodiment 2

[0053] A kind of Nb provided by this embodiment 2 O 5 The preparation method of nanorod, comprises the following steps:

[0054] (1) First, 2 g Nb 2 AlC was placed in 20 ml of 50% hydrofluoric acid, and etched at room temperature for 90 hours.

[0055] (2) Centrifuge the etched liquid in step (1) and wash it repeatedly with deionized water and absolute ethanol until the pH is 6;

[0056] (3) Pour off the supernatant liquid of the product obtained in step (2), remove the lower layer of precipitate and place it in a vacuum drying oven to dry to obtain multi-layer MXenes;

[0057] (4) The multi-layer niobium-based MXenes obtained in step (3) were placed in a tetramethylammonium hydroxide solution, and heated and stirred at 35 °C for 24 hours;

[0058] (5) Centrifuge the solution obtained in step (4) with a centrifuge, pour out the upper layer liquid obtained for the first time, add deionized water to the centrifuge tube, and then sonicate or shake vigorously to re-disperse th...

Embodiment 3

[0063] A kind of Nb provided by this embodiment 2 O 5 The preparation method of nanorod, comprises the following steps:

[0064] (1) First, 2 g Nb 2 AlC was placed in 20 ml mass fraction concentration of 50% hydrofluoric acid, and etched at room temperature for 90 hours;

[0065] (2) Centrifuge the etched liquid in step (1) and wash it repeatedly with deionized water and absolute ethanol until the pH is 6;

[0066] (3) Pour off the supernatant liquid of the product obtained in step (2), remove the lower layer of precipitate and place it in a vacuum drying oven to dry to obtain multi-layer MXenes;

[0067] (4) The multi-layer niobium-based MXenes obtained in step (3) were placed in a tetramethylammonium hydroxide solution, and heated and stirred at 55 °C for 6 hours;

[0068] (5) Centrifuge the solution obtained in step (4) with a centrifuge, pour out the upper layer liquid obtained for the first time, add deionized water to the centrifuge tube, and then sonicate or shake v...

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Abstract

The invention belongs to the technical field of nano material preparation and the field of new energy, and particularly relates to a preparation method and application of an Nb2O5 nanorod. The diameter and the length of the Nb2O5 nanorod are respectively 20 to 100 nanometers and 100 to 900 nanometers. The preparation method comprises the following steps: putting multiple layers of MXenes into a tetramethylammonium hydroxide solution, heating and stirring to obtain an upper-layer solution, namely a few-layer MXenes solution, transferring the few-layer niobium-based MXenes solution into a reaction kettle, and carrying out heating, cooling, centrifuging and drying to obtain a final product. According to the method, a simple hydrothermal method is adopted, the two-dimensional MXenes material is converted into the one-dimensional nanorods, and the nanorods are uniform in structure and extremely high in crystallization degree. When the material is used as a negative electrode material of a lithium ion capacitor, an ion diffusion path can be shortened due to a nano-scale structure, so that a quicker charging and discharging process and excellent cycle performance are shown.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and the field of new energy, and in particular relates to a Nb 2 O 5 Preparation method and application of nanorods. [0002] technical background [0003] Lithium-ion capacitor is a new type of electrochemical energy storage device. The positive electrode is made of porous carbon material of electric double layer capacitor, and the negative electrode is made of embedded lithium-ion battery negative electrode material, so it has the dual characteristics of battery and capacitor. Compared with lithium-ion batteries, it has higher power density and more stable cycling performance, and compared with electric double-layer capacitors, it has higher energy density. At present, the biggest problem of lithium-ion capacitors is the unbalanced reaction kinetics between the positive and negative electrodes. Finding a high-power negative electrode material is the key to solving this problem. [0004] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G33/00H01G11/06H01G11/24H01G11/46H01G11/50B82Y30/00B82Y40/00
CPCC01G33/00H01G11/06H01G11/24H01G11/46H01G11/50B82Y30/00B82Y40/00C01P2004/16C01P2004/64C01P2004/62C01P2002/30Y02E60/13
Inventor 原长洲秦理刘洋侯林瑞徐森炀
Owner UNIV OF JINAN
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