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Titanium carbide-titanium tetrasulfide composite material and preparation method therefor

A technology of trititanium tetrasulfide and composite materials, which is applied in the field of preparation of nanocomposite materials, can solve the problems of limited development and application, low mass specific capacity, etc., and achieve the effects of high conductivity, increased specific capacity and 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 and application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Treat Ti with 40% HF solution at room temperature 3 SiC 2 Powder material, prepared Ti with 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 the elemental sulfur powder is placed on the Ti 3 C 2 The upwind position of the material, using Ar as the carrier gas, using 5 o The heating rate of C / min rises to 1000 o C, Ti with "accordion" microstructure can be obtained after heat preservation for 1h 3 C 2 -Ti 3 S 4 Nanocomposite materials. With the prepared Ti 3 C 2 -Ti 3 S 4 The nanocomposite material is the electrode material, which is mixed with acetylene black and polyvinylidene fluoride and then coated on a copper sheet (mass ratio 80:10:10). After vacuum drying, it is used as the electrode, and the metal lithium sheet is used as the counter electrode. To contain 1mol L -1 LiPF 6 The mixed solution of ethylene carbonate (EC) and dim...

Embodiment 2

[0015] Treat Ti with 30% HF solution at room temperature 3 AlC 2 Powder material, prepared Ti with 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 the elemental sulfur powder is placed on the Ti 3 C 2 The upwind position of the material, in N 2 As the carrier gas, with 5 o The heating rate of C / min increased to 1100 o C, Ti with an "accordion" microstructure can be obtained after holding for 30 minutes 3 C 2 -Ti 3 S 4 Nanocomposite materials. With the prepared Ti 3 C 2 -Ti 3 S 4 The nanocomposite material is the electrode material, which is mixed with acetylene black and polyvinylidene fluoride and then coated on a copper sheet (mass ratio 80:10:10). After vacuum drying, it is used as the electrode, and the metal lithium sheet is used as the counter electrode. To contain 1mol L -1 LiPF 6 The mixed solution of ethylene carbonate (EC) and ...

Embodiment 3

[0017] Treat Ti with 15% HF solution at room temperature 2 AlC powder material, prepared Ti with accordion-like microstructure 2 C material, the Ti 2 The C material is placed in the middle of the tube furnace, as close as possible to the position where the thermocouple is placed, and the elemental sulfur powder is placed on the Ti 3 C 2 The upwind position of the material, in N 2 As the carrier gas, with 5 o C / min heating rate increased to 900 o C, Ti with an "accordion" microstructure can be obtained after heat preservation for 2h 2 C-Ti 3 S 4 Nanocomposite materials. With the prepared Ti 2 C-Ti 3 S 4 The nanocomposite material is the electrode material, which is mixed with acetylene black and polyvinylidene fluoride and then coated on a copper sheet (mass ratio 80:10:10). After vacuum drying, it is used as the electrode, and the metal lithium sheet is used as the counter electrode. To contain 1mol L -1 LiPF 6 The mixed solution of ethylene carbonate (EC) and dimethyl carbonate...

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Abstract

The invention discloses a titanium carbide-titanium tetrasulfide (Ti<3>S<4>) composite material with an accordion-shaped microstructure and a preparation method therefor. Ti<3>SiC<2>, Ti<3>AlC<2> or Ti<2>AlC ceramic powder material is etched by hydrofluoric acid; the prepared accordion-shaped titanium carbide material, used as the raw material, is reacted with titanium carbide through elementary sulfur in a high temperature condition to prepare the titanium carbide-titanium tetrasulfide (Ti<3>S<4>) composite nanomaterial with the accordion-shaped microstructure. The titanium carbide-titanium tetrasulfide (Ti<3>S<4>) composite nanomaterial is used as the negative electrode material of a lithium ion battery; and the composite material shows relatively high specific capacity and high rate capability and charging-discharging cycling performance.

Description

Technical field [0001] The invention relates to the preparation field of nanocomposite materials, in particular to a titanium carbide-Ti microstructure in the shape of an "accordion" 3 S 4 Preparation method of composite nano material. 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. It can be used in lithium-ion batteries, lithium-sulfur batteries, supercapacitors, fuel cells and other fields, but its lower The mass ratio capacity limits its further development and application. [0003] Ti by chemical etching 3 SiC 2 , Ti 3 AlC 2 Or Ti 2 The AlC layered ceramic material method can prepare a combination of titanium car...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M10/0525B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/362H01M4/58H01M4/5815H01M10/0525Y02E60/10
Inventor 武卫明周丽敏张长松侯绍刚王书红赵凌
Owner ANYANG INST OF TECH
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