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Titanium disulfide nanosheet and preparation method thereof

A titanium disulfide, nanosheet technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of low mass specific capacity, limited development, etc., to improve specific capacity and low cost , the effect of high yield

Inactive Publication Date: 2017-12-19
ANYANG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Titanium carbide two-dimensional nanomaterial is a new type of graphene-like nanomaterial, which has the advantages of thin thickness and high conductivity. Mass specific capacity limits its further development

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Treatment of Ti by 40% HF solution at room temperature 3 SiC 2 powder material, prepared Ti with an accordion-like microstructure 3 C 2 material, the Ti 3 C 2 The material is placed in the middle of the tube furnace, as close as possible to the position where the thermocouple is placed, and then passed into the H 2 S / Ar mixed gas, where H in the mixed gas 2 The volume concentration of S is 40%, after 2h, with 5 o C / min heating rate up to 1100 o C, after 5 hours of heat preservation, use 5 o Cool down to room temperature at a cooling rate of C / min, disperse the prepared solid powder in isopropanol solvent, use probe-type ultrasonic equipment for ultrasonic liquid phase exfoliation, and obtain two-dimensional TiS by centrifugation 2 Nanosheets. With the prepared TiS 2 The nanosheet is the electrode material, which is coated on the copper sheet after being mixed with acetylene black and polyvinylidene fluoride (mass ratio is 80:10:10), and used as the electrode a...

Embodiment 2

[0016] Treatment of Ti by 15% HF solution at room temperature 2 AlC powder material, prepared Ti with accordion-like microstructure 2 C material, the Ti 2 C material is placed in the middle of the tube furnace, as close as possible to the position where the thermocouple is placed, and then passed into H 2 S / Ar mixed gas, where H in the mixed gas 2 The volume concentration of S is 30%, after 2h, with 5 o C / min heating rate up to 1200 o C, after 6 hours of heat preservation, use 5 o Cool down to room temperature at a cooling rate of C / min, disperse the prepared solid powder in isopropanol solvent, use probe-type ultrasonic equipment for ultrasonic liquid phase exfoliation, and obtain two-dimensional TiS by centrifugation 2 Nanosheets. With the prepared TiS 2 The nanosheet is the electrode material, which is coated on the copper sheet after being mixed with acetylene black and polyvinylidene fluoride (mass ratio is 80:10:10), and used as the electrode after vacuum drying, ...

Embodiment 3

[0018] Treatment of Ti by 30% HF solution at room temperature 3 AlC 2 powder material, prepared Ti with an accordion-like microstructure 3 C 2 material, the Ti 3 C 2 The material is placed in the middle of the tube furnace, as close as possible to the position where the thermocouple is placed, and then passed into the H 2 S / Ar mixed gas, where H in the mixed gas 2 The volume concentration of S is 50%, after 2h, with 5 o C / min heating rate up to 1200 o C, after 6 hours of heat preservation, use 5 o Cool down to room temperature at a cooling rate of C / min, disperse the prepared solid powder in isopropanol solvent, use probe-type ultrasonic equipment for ultrasonic liquid phase exfoliation, and obtain two-dimensional TiS by centrifugation 2 Nanosheets. With the prepared TiS 2 Nanosheets are electrode materials, which are mixed with acetylene black and polyvinylidene fluoride (mass ratio 80:10:10) and coated on copper sheets. After vacuum drying, they are used as electro...

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Abstract

The invention discloses a titanium disulfide nanosheet and a preparation method thereof. An accordion-shaped titanium carbide material prepared through etching Ti3SiC2, Ti3AlC2 or Ti2AlC ceramic powder material by hydrofluoric acid is used as a raw material, and the two-dimensional titanium disulfide nanosheet can be prepared by high-temperature processing on hydrogen sulfide gas and subsequent liquid-phase ultrasonic stripping. The two-dimensional titanium disulfide nanosheet has relatively high specific capacity, favorable rate performance and charge-discharge cycle performance when used as a lithium ion battery negative electrode material.

Description

technical field [0001] The invention relates to the field of preparation of two-dimensional nanomaterials, in particular to a preparation method of two-dimensional titanium disulfide nanosheets. Background technique [0002] Graphene and graphene-like two-dimensional nanomaterials are emerging nanomaterials in recent years. Due to their unique structure and properties, they can be widely used in energy storage, catalysis, electronics and other fields. Titanium carbide two-dimensional nanomaterial is a new type of graphene-like nanomaterial, which has the advantages of thin thickness and high conductivity. The mass ratio capacity limits its further development. [0003] Titanium disulfide has a scaly crystal structure and can be used as an anode material in lithium-ion batteries. However, it is difficult to prepare titanium disulfide nanosheets with a two-dimensional structure, resulting in a low effective utilization rate in electrodes. In order to prepare Titanium disulfi...

Claims

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Application Information

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IPC IPC(8): H01M4/58H01M10/0525B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/5815H01M10/0525Y02E60/10
Inventor 武卫明王书红张长松周丽敏赵凌张楠侯绍刚
Owner ANYANG INST OF TECH
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