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Mono-like mesoporous titanium oxynitride nanowire consisting of nano-grains same in orientation and preparation method and application of such mono-like mesoporous titanium oxynitride nanowire

A titanium oxynitride and nanocrystalline technology, applied in the field of nanomaterials and electrochemistry, can solve the problems of low voltage window, energy density and poor cycle performance, and achieve increased contact area, good electron transport, long cycle effect of life

Active Publication Date: 2017-05-31
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, titanium oxynitride has been gradually studied as a capacitor electrode material, but its energy density and cycle performance are not good, mainly because the aqueous electrolyte has a low voltage window, and it interacts with the electrolyte during charge and discharge. water reacts

Method used

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  • Mono-like mesoporous titanium oxynitride nanowire consisting of nano-grains same in orientation and preparation method and application of such mono-like mesoporous titanium oxynitride nanowire
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  • Mono-like mesoporous titanium oxynitride nanowire consisting of nano-grains same in orientation and preparation method and application of such mono-like mesoporous titanium oxynitride nanowire

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Experimental program
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Embodiment 1

[0034] A method for preparing a single crystal-like mesoporous titanium oxynitride nanowire composed of nanocrystal grains with the same orientation, comprising the following steps:

[0035] 1) Add 2g of anatase titanium dioxide to 30ml of sodium hydroxide solution with a concentration of 15mol / L, stir magnetically for 1 hour until uniform;

[0036] 2) Transfer the suspension obtained in step 1) into a reaction kettle, heat at 180°C for 72 hours, take out the reaction kettle, and naturally cool to room temperature;

[0037] 3) centrifuging the product obtained in step 2), and washing with water and ethanol;

[0038] 4) Dissolving the product obtained in step 3) in 0.1mol / L hydrochloric acid and fully stirring;

[0039] 5) centrifugally filter the product obtained in step 4), repeatedly wash the obtained precipitate with deionized water and absolute ethanol, and dry it in an oven at 70°C to obtain H 2 Ti 3 o 7 Nanowire precursors;

[0040] 6) with step 5) obtained H 2 Ti ...

Embodiment 2

[0047] A method for preparing a single-crystal-like mesoporous titanium oxynitride nanowire composed of nanocrystal grains with the same orientation, comprising the following steps:

[0048] 1) Add 2g of anatase titanium dioxide to 30ml of sodium hydroxide solution with a concentration of 15mol / L, stir magnetically for 1 hour until uniform;

[0049] 2) Transfer the suspension obtained in step 1) into a reaction kettle, heat at 200°C for 48 hours, take out the reaction kettle, and naturally cool to room temperature;

[0050] 3) centrifuging the product obtained in step 2), and washing with water and ethanol;

[0051] 4) Dissolving the product obtained in step 3) in 0.1mol / L hydrochloric acid and fully stirring;

[0052] 5) centrifugally filter the product obtained in step 4), repeatedly wash the obtained precipitate with deionized water and absolute ethanol, and dry it in an oven at 70°C overnight to obtain H 2 Ti 3 o 7 Nanowire precursors;

[0053] 6) with step 5) obtaine...

Embodiment 3

[0057] A method for preparing a single-crystal-like mesoporous titanium oxynitride nanowire composed of nanocrystal grains with the same orientation, comprising the following steps:

[0058] 1) Add 2g of anatase titanium dioxide to 30ml of sodium hydroxide solution with a concentration of 15mol / L, stir magnetically for 1 hour until uniform;

[0059] 2) Transfer the suspension obtained in step 1) into a reaction kettle, heat at 150°C for 64 hours, take out the reaction kettle, and naturally cool to room temperature;

[0060] 3) centrifuging the product obtained in step 2), and washing with water and ethanol;

[0061] 4) Dissolving the product obtained in step 3) in 0.1mol / L hydrochloric acid and fully stirring;

[0062] 5) centrifugally filter the product obtained in step 4), repeatedly wash the obtained precipitate with deionized water and absolute ethanol, and dry it in an oven at 70°C overnight to obtain H 2 Ti 3 o 7 Nanowire precursors;

[0063] 6) with step 5) obtaine...

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Abstract

The invention relates to a mono-like mesoporous titanium oxynitride nanowire consisting of nano-grains same in orientation and a preparation method of such mono-like mesoporous titanium oxynitride nanowire. The mono-like mesoporous titanium oxynitride nanowire is formed by overlapping of titanium oxynitride nano-grains 5-20 nm in diameter in the same orientation, the nanowire with a rich mesoporous structure inside is 3-7 micrometers in length and 80-100 nm in diameter, the mesoporous volume is 0.08-0.16 cm<3> / g and the specific area is up to 30-70 m<2> / g. Different degrees of oxygen doping is achieved through sintering temperature regulation, and the mono-like mesoporous titanium oxynitride nanowire consisting of the nano-grains same in orientation is higher in electrochemical activity. The mono-like mesoporous titanium oxynitride nanowire consisting of the nano-grains same in orientation is synthesized through a skillful hydrothermal-sintering technology combination method and is much higher in rate performance and much longer in cycle life, thereby being used as a potential negative electrode material of high-performance sodion hybrid capacitors.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and electrochemistry, and in particular relates to a single-crystal mesoporous titanium oxynitride nanowire composed of homo-oriented nanocrystal grains and a preparation method thereof. The material can be used as a high-power and long-life sodium ion hybrid capacitor Negative material. Background technique [0002] As a green chemical storage device, lithium-ion batteries have been widely used in people's daily life, such as mobile phones, cameras, notebooks and other portable devices, and have gradually become the best choice for power vehicles. It is worth noting that the reserves of lithium resources on the earth are limited, and the increasing demand for lithium has continuously reduced lithium resources, which in turn has led to an upward trend in the price of lithium resources. Compared with lithium resources, sodium resources are more abundant on the earth, so the price is lower. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/36H01G11/46B82Y30/00B82Y40/00
CPCY02E60/13H01G11/86B82Y30/00B82Y40/00H01G11/36H01G11/46
Inventor 麦立强董君姜亚龙魏湫龙安琴友
Owner WUHAN UNIV OF TECH
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