Nitrogen-doped rod-like titanium oxide/two-dimensional laminated titanium carbide nanometer composite electrode material, and preparation method and application therefor

A nanocomposite material, two-dimensional layered technology, applied in hybrid/electric double layer capacitor manufacturing, hybrid capacitor electrodes, nanotechnology for materials and surface science, etc., can solve the problem of low nitrogen doping content, achieve High specific capacity, good rate performance and cycle stability, novel shape effect

Active Publication Date: 2016-10-12
SHAANXI UNIV OF SCI & TECH
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  • Abstract
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Problems solved by technology

[0004] At present, titanium oxide / two-dimensional layered titanium carbide nanocomposites have not been reported on nitrogen-doped nanocomposites, and the general nitrogen doping methods (such as: atmosphere treatment, calcination) mostly use two steps and the nitrogen doping content is low

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  • Nitrogen-doped rod-like titanium oxide/two-dimensional laminated titanium carbide nanometer composite electrode material, and preparation method and application therefor
  • Nitrogen-doped rod-like titanium oxide/two-dimensional laminated titanium carbide nanometer composite electrode material, and preparation method and application therefor
  • Nitrogen-doped rod-like titanium oxide/two-dimensional laminated titanium carbide nanometer composite electrode material, and preparation method and application therefor

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Embodiment 1

[0020] In the nitrogen-doped rod-shaped titanium oxide / two-dimensional layered titanium carbide nanocomposite electrode material of this embodiment, the rod-shaped titanium oxide is distributed on the surface of the sheet and between the sheets, and its nitrogen content accounts for 33.48% of the total atomic percentage.

[0021] A method for preparing a nitrogen-doped rod-shaped titanium oxide / two-dimensional layered titanium carbide nanocomposite electrode material, comprising the following steps:

[0022] Step 1, take Ti 3 C 2 Stir and mix 50mg of powder with 50mL urea aqueous solution for 0.5h, the mass ratio of urea:water in urea aqueous solution is 1:0.5;

[0023] Step 2, put the solution obtained in Step 1 into a hydrothermal kettle, heat it at 180°C for 12 hours, then wash the reacted powder with deionized water and absolute ethanol several times, and then put it into a vacuum at 40°C drying in an oven to obtain the active material—nitrogen-doped rod-shaped titanium ...

Embodiment 2

[0032] In the nitrogen-doped rod-shaped titanium oxide / two-dimensional layered titanium carbide nanocomposite electrode material of this embodiment, the rod-shaped titanium oxide is distributed on the surface of the sheet and between the sheets, and its nitrogen content accounts for about 25% of the total atomic percentage.

[0033] A method for preparing a nitrogen-doped rod-shaped titanium oxide / two-dimensional layered titanium carbide nanocomposite electrode material, comprising the following steps:

[0034] Step 1, take Ti 3 C 2 Stir and mix 50mg of powder with 50mL urea aqueous solution for 2 hours, the mass ratio of urea:water in urea aqueous solution is 1:1;

[0035] Step 2, put the solution obtained in step 1 into a hydrothermal kettle, heat it at 160°C for 12 hours, then wash the reacted powder with deionized water and absolute ethanol several times, and then put it into a vacuum at 40°C drying in an oven to obtain the active material—nitrogen-doped rod-shaped titan...

Embodiment 3

[0041] In the nitrogen-doped rod-shaped titanium oxide / two-dimensional layered titanium carbide nanocomposite electrode material of this embodiment, the rod-shaped titanium oxide is distributed on the surface of the sheet and between the sheets, and its nitrogen content accounts for 22% of the total atomic percentage.

[0042] A method for preparing a nitrogen-doped rod-shaped titanium oxide / two-dimensional layered titanium carbide nanocomposite electrode material, comprising the following steps:

[0043] Step 1, take Ti 3 C 2 Stir and mix 50mg of powder with 50mL urea aqueous solution for 4 hours, the mass ratio of urea:water in urea aqueous solution is 1:2;

[0044] Step 2, put the solution obtained in step 1 into a hydrothermal kettle, heat it in water at 200°C for 12 hours, then wash the reacted powder with deionized water and absolute ethanol several times, and then put it in a vacuum at 40°C drying in an oven to obtain the active material—nitrogen-doped rod-shaped tita...

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Abstract

The invention discloses a nitrogen-doped rod-like titanium oxide / two-dimensional laminated titanium carbide nanometer composite electrode material, and a preparation method and an application therefor. The rod-like titanium oxide / two-dimensional laminated titanium carbide nanometer composite material with a high nitrogen content is obtained from the two-dimensional laminated titanium carbide Ti<3>C<2> and urea water solutions of different concentrations by synthesis through a hydrothermal method. The rod-like titanium oxide of the composite material is distributed on the surfaces of the laminated layers and between the laminated layers; the nitrogen content accounts for 10-35% of the total percentage of the atoms, so that the specific surface area of the material is enlarged; the conductivity and the wettability of the nanometer composite material are greatly improved due to the high nitrogen content; and therefore, when the material and conductive carbon black are added to a prepared viscous fluid, the electrode material can be prepared finally. The preparation process is simple, controllable and low in cost; the nitrogen doping content is high; and the obtained titanium oxide is creative in appearance and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of nano functional materials and the technical field of preparation of electrochemical energy storage materials, in particular to one-step preparation of nitrogen-doped rod-shaped titanium dioxide / two-dimensional layered titanium carbide nanocomposite electrode materials. Background technique [0002] Two-dimensional layered titanium carbide (MXene) is the use of Ti 3 AlC 2 The difference in interlayer force is obtained by corroding the Al layer by a certain method. Due to its unique graphene-like structure, large specific surface area, and good conductivity, it has been widely used in adsorption, photocatalysis, biosensors, lithium-ion batteries, supercapacitors, etc. Especially in supercapacitors, it has excellent specific capacity and stability compared with other electrode materials. In 2011, Wu et al. made graphene in NH 3 N-graphene is obtained by heat treatment under the atmosphere....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/48H01G11/30H01G11/24H01G11/86B82Y30/00B82Y40/00
CPCY02E60/13H01G11/48B82Y30/00B82Y40/00H01G11/24H01G11/30H01G11/86
Inventor 朱建锋赵倩楠汤祎李学林赵婷王芬牛冬娟
Owner SHAANXI UNIV OF SCI & TECH
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