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A kind of sulfur-doped mxene material and its preparation method and application

A technology of sulfur doping and sodium sulfide, applied in the field of nanomaterials, can solve the problems such as the specific capacitance and capacitance need to be improved, and achieve the effects of simple preparation method, improved specific capacity and cycle stability, and controllable doping content

Inactive Publication Date: 2019-10-25
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] But at present, pure MXene materials are used as electrode materials for supercapacitors or lithium-ion batteries, and the specific capacitance and capacitance need to be improved.

Method used

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  • A kind of sulfur-doped mxene material and its preparation method and application
  • A kind of sulfur-doped mxene material and its preparation method and application
  • A kind of sulfur-doped mxene material and its preparation method and application

Examples

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Effect test

Embodiment 1

[0050] The present embodiment provides a kind of preparation method of sulfur-doped MXene material, comprises the following steps:

[0051] Step 1, preparation of two-dimensional Ti 3 C 2 Material: take 5g Ti 3 AlC 2 , add 40ml of 40% HF solution with a mass fraction, stir at room temperature for 3h, then centrifuge, remove the lower layer of solid, wash with deionized water, and centrifuge several times until the supernatant pH=6-7, remove the lower layer of solid, and place Vacuum drying at 50°C for 24 hours to obtain Ti 3 C 2 Material;

[0052] Step 2, preparing sulfur-doped Ti 3 C 2 Material: Take 1g Ti 3 C 2 The material is put into the tube furnace, and H 2 S gas, the flow rate is controlled at 100ml / min, and then the temperature is raised to 700°C for heat treatment for 2h, and then the tube furnace is lowered to room temperature, and the sample is taken out to obtain sulfur-doped Ti 3 C 2 Material.

[0053] For the sulfur-doped Ti prepared in this example ...

Embodiment 2

[0063] The present embodiment provides a kind of preparation method of sulfur-doped MXene material, comprises the following steps:

[0064] Get 1g embodiment 1 to prepare Ti 3 C 2 The material is put into the tube furnace, and H 2 S gas, control its flow rate to 100ml / min, then raise the temperature to 500°C for heat treatment for 2h, then lower the tube furnace to room temperature, take out the sample, and obtain sulfur-doped Ti 3 C 2 Material.

[0065] For the sulfur-doped Ti prepared in this example 3 C 2 Materials are characterized as Figure 4 As shown in the scanning electron microscope figure, the sulfur-doped Ti prepared in this embodiment 3 C 2 The material is a layered structure with an atomic doping content of 1.03% of sulfur atoms and a specific surface area of ​​50m 2 / g.

[0066] Adopt the method for embodiment 1 to make the sulfur-doped Ti that the present embodiment makes 3 C 2 The materials were made into working electrodes and used in supercapacit...

Embodiment 3

[0069] The present embodiment provides a kind of preparation method of sulfur-doped MXene material, comprises the following steps:

[0070] Get 1g embodiment 1 to prepare Ti 3 C 2 The material is put into the tube furnace, and H 2 S gas, control its flow rate to 100ml / min, then raise the temperature to 900°C for heat treatment for 2h, then cool down the tube furnace to room temperature, take out the sample, and obtain sulfur-doped Ti 3 C 2 Material.

[0071] For the sulfur-doped Ti prepared in this example 3 C 2 Materials are characterized as Figure 5 As shown in the scanning electron microscope figure, the sulfur-doped Ti prepared in this embodiment 3 C 2 The material is a layered structure with an atomic doping content of sulfur atoms of 11.70% and a specific surface area of ​​34m 2 / g.

[0072] Adopt the method for embodiment 1 to make the sulfur-doped Ti that the present embodiment makes 3 C 2 The materials were made into working electrodes and used in superca...

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Abstract

The invention provides a sulfur-doped MXene material which is of a layered structure; the specific surface area of the material is 30m<2> / g to 70m<2> / g; and based on atomic percentage, the sulfur atom doping amount in the sulfur-doped MXene material is 1% or above. The invention also provides a preparation method of the sulfur-doped MXene material and an application by adopting the sulfur-doped MXene material as an electrode material of a supercapacitor and a lithium ion battery. By virtue of the sulfur-doped MXene material provided by the invention, the specific capacity and cycling stability of MXene used as the electrode material are improved; and in addition, the preparation method is simple, the doping content of the sulfur element is controllable, and large-scale development and application can be realized.

Description

technical field [0001] The invention belongs to the field of nanomaterials, and relates to a sulfur-doped MXene material and its preparation method and application, in particular to a sulfur-doped MXene material, its preparation method and its application as an electrode material in supercapacitors or lithium-ion batteries. Background technique [0002] With the continuous consumption of fossil energy and the aggravation of environmental pollution, renewable and clean energy such as solar energy, wind energy and tidal energy have attracted widespread attention, and the mining of new energy and the development of new energy technologies have also become research hotspots. However, due to the uncertainty of these renewable energy sources, the lack of stability in power generation and power output, energy storage devices are urgently needed for sustainable power storage and output. [0003] Supercapacitor is a new type of energy storage device developed in the 1970s between tra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/32H01M4/36H01M4/58H01M4/587H01M10/0525
CPCH01G11/24H01G11/32H01M4/366H01M4/5815H01M4/587H01M10/0525Y02E60/10Y02E60/13
Inventor 温洋洋马征征李振兴
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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