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Preparation method and application of a sulfur-polypyrrole-two-dimensional layered titanium carbide composite material

A two-dimensional layered and composite material technology, applied in the field of material chemistry, can solve the problems of specific capacitance and capacitance to be improved, and achieve the effect of improving capacitance, good conductivity, and large energy storage space

Active Publication Date: 2022-02-22
INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current pure MXene material is used as an electrode material, and the specific capacitance and capacitance still need to be improved.

Method used

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  • Preparation method and application of a sulfur-polypyrrole-two-dimensional layered titanium carbide composite material
  • Preparation method and application of a sulfur-polypyrrole-two-dimensional layered titanium carbide composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0024] (1) Preparation of two-dimensional layered Ti 2 C:

[0025] 0.8g Ti 2 AlC powder was placed in 80mL of hydrofluoric acid solution (mass fraction: 40%), heated to 60°C, and reacted for 18 hours under magnetic stirring conditions. After the reaction was completed, the product was collected by centrifugation, washed repeatedly with deionized water until the pH was neutral, and dried in an oven at 60°C for 12 hours to obtain a two-dimensional layered Ti 2 c.

[0026] (2) Preparation of polypyrrole-Ti 2 C composite material:

[0027] Take the two-dimensional layered Ti prepared in step (1) 2 C 0.8g, 0.5g anhydrous sodium acetate, 1.5mL pyrrole monomer was dissolved in 30 mL deionized water, dispersed evenly by ultrasonication for 20 min, and placed in a refrigerator at 4°C for 2 hours. After that, 8 mL of ferric chloride solution (concentration: 0.03 mol / L) was added, and then placed in the refrigerator at 4°C for 2 hours. After the reaction was completed, the product...

Embodiment 2

[0033] (1) Preparation of two-dimensional layered Ti 2 C:

[0034] 0.5g Ti 2AlC powder was placed in 50mL hydrofluoric acid solution (mass fraction: 20%), heated to 50°C, and reacted for 12 hours under magnetic stirring conditions. After the reaction was completed, the product was collected by centrifugation, washed repeatedly with deionized water until the pH was neutral, and dried in an oven at 60°C for 12 hours to obtain a two-dimensional layered Ti 2 c.

[0035] (2) Preparation of polypyrrole-Ti 2 C composite material:

[0036] Take the two-dimensional layered Ti prepared in step (1) 2 C 0.5g, 0.3g anhydrous sodium acetate, 1mL pyrrole monomer dissolved in 20mL deionized water, ultrasonically dispersed for 10 min, and placed in a refrigerator at 2°C for 1 hour. Then take it out and add 5mL of ferric chloride solution (concentration: 0.01 mol / L), and then put it in the refrigerator at 2°C for 1 hour. After the reaction was completed, the product was collected by cent...

Embodiment 3

[0040] (1) Preparation of two-dimensional layered Ti 2 C:

[0041] 1g Ti 2 AlC powder was placed in 100mL of hydrofluoric acid solution (50% by mass), heated to 80°C, and reacted for 24 hours under magnetic stirring conditions. After the reaction was completed, the product was collected by centrifugation, washed repeatedly with deionized water until the pH was neutral, and dried in an oven at 60°C for 12 hours to obtain a two-dimensional layered Ti 2 c.

[0042] (2) Preparation of polypyrrole-Ti 2 C composite material:

[0043] Take the two-dimensional layered Ti prepared in step (1) 2 C 1g, 0.6g anhydrous sodium acetate, 2mL pyrrole monomer was dissolved in 50mL deionized water, ultrasonically dispersed for 30 min, and placed in a refrigerator at 10°C for 3 hours. Then take it out and add 10mL of ferric chloride solution (concentration: 0.05 mol / L), and then put it in the refrigerator at 10°C for 3 hours. After the reaction was completed, the product was collected by c...

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Abstract

The invention relates to a preparation method of a sulfur-polypyrrole-two-dimensional layered titanium carbide composite material and its application in lithium-sulfur batteries. Polypyrrole-two-dimensional layered titanium carbide composites were used as sulfur carrier materials, and sulfur-polypyrrole-two-dimensional layered titanium carbide composites were prepared by doping sulfur by ball milling and hot melting. The composite material is used as the positive electrode material of the lithium-sulfur battery, which can greatly increase the sulfur loading capacity, inhibit the shuttle effect, and alleviate the volume expansion of the lithium-sulfur battery during charging and discharging.

Description

technical field [0001] The technical solution of the present invention relates to a preparation method of a high specific capacity lithium-sulfur battery positive electrode material, in particular to a preparation method of a sulfur-polypyrrole-two-dimensional layered titanium carbide composite material and its use as a lithium-sulfur battery positive electrode material Applications, belonging to the field of materials chemistry. Background technique [0002] With the rapid development of related fields such as portable electronics, electric vehicles, and energy storage, the performance of batteries is increasingly required. It is of great strategic significance to develop new lithium-ion secondary batteries with high performance, low cost and environmental friendliness. At present, the theoretical specific capacity of the commercialized lithium-ion battery is limited by its own theoretical specific capacity of 300mAh / g, which obviously cannot meet the quality requirements ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/62H01M10/0525
CPCH01M4/364H01M4/38H01M4/624H01M4/628H01M10/0525Y02E60/10
Inventor 钊妍王加义
Owner INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV
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