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Molybdenum diselenide/titanium dioxide composite material and preparation method and application therefor

A technology of titanium dioxide and molybdenum diselenide is applied in electrical components, battery electrodes, circuits, etc., to achieve the effects of simple and controllable preparation method, reasonable structure and uniform product appearance

Active Publication Date: 2016-03-02
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But so far, there is no relevant report on molybdenum diselenide modified titanium dioxide composites

Method used

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  • Molybdenum diselenide/titanium dioxide composite material and preparation method and application therefor
  • Molybdenum diselenide/titanium dioxide composite material and preparation method and application therefor
  • Molybdenum diselenide/titanium dioxide composite material and preparation method and application therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] 1) Add a volume of 66mL of 10mol / L sodium hydroxide concentrated alkali to 100mL of polytetrafluoroethylene lining, then add 0.66g of titanium dioxide (anatase phase) powder (particle size is 25nm), stir until uniformly mixed, A white cloudy suspension was formed;

[0054] 2) Seal the polytetrafluoroethylene liner into the autoclave, start heating in a closed drying oven and heat the reaction at 180°C for 24h;

[0055] 3) After the reaction is completed, cool down to room temperature with the furnace, and then obtain the original product by vacuum filtration, and dry it in a drying oven at 60°C for 8 hours;

[0056] 4) Soak the sample dried in step 3) in 0.1mol / L dilute hydrochloric acid for 24 hours, wash it with deionized water by centrifugation until it is neutral, and then dry it in a drying oven;

[0057] 5) Place the sample obtained in step 4) in a corundum ark, start heating in a muffle furnace, heat at 500°C for 2h, and cool to room temperature with the furnace...

Embodiment 2

[0066] 1) Add a volume of 66mL of 10mol / L sodium hydroxide concentrated alkali to 100mL of polytetrafluoroethylene lining, then add 0.66g of titanium dioxide (anatase phase) powder (particle size is 25nm), stir until uniformly mixed, A white cloudy suspension was formed;

[0067] 2) Seal the polytetrafluoroethylene liner into the autoclave, start heating in a closed drying oven and heat the reaction at 180°C for 24h;

[0068] 3) After the reaction is completed, cool down to room temperature with the furnace, and then obtain the original product by vacuum filtration, and dry it in a drying oven at 60°C for 8 hours;

[0069] 4) Soak the sample dried in step 3) in 0.1mol / L dilute hydrochloric acid for 24 hours, wash it with deionized water by centrifugation until it is neutral, and then dry it in a drying oven;

[0070] 5) Place the sample obtained in step 4) in a corundum ark, start heating in a muffle furnace, heat at 500°C for 2h, and cool to room temperature with the furnace...

Embodiment 3

[0077] 1) Add a volume of 66mL of 10mol / L sodium hydroxide concentrated alkali to 100mL of polytetrafluoroethylene lining, then add 0.66g of titanium dioxide (anatase phase) powder (particle size is 25nm), stir until uniformly mixed, A white cloudy suspension was formed;

[0078] 2) Seal the polytetrafluoroethylene liner into the autoclave, start heating in a closed drying oven and heat the reaction at 180°C for 24h;

[0079] 3) After the reaction is completed, cool down to room temperature with the furnace, and then obtain the original product by vacuum filtration, and dry it in a drying oven at 60°C for 8 hours;

[0080] 4) Soak the sample dried in step 3) in 0.1mol / L dilute hydrochloric acid for 24 hours, wash it with deionized water by centrifugation until it is neutral, and then dry it in a drying oven;

[0081] 5) Place the sample obtained in step 4) in a corundum ark, start heating in a muffle furnace, heat at 500°C for 2h, and cool to room temperature with the furnace...

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Abstract

The invention relates to a molybdenum diselenide / titanium dioxide composite material and a preparation method and an application therefor, and belongs to the technical field of battery electrode material development and design. According to the designed molybdenum diselenide / titanium dioxide composite material, the molar ratio of the titanium dioxide to molybdenum diselenide is 2.1-2.3:1; the titanium dioxide is distributed in the composite material in a nanoribbon form; the titanium dioxide is coated with the molybdenum diselenide that is in a nanosheet form; the preparation method comprises the steps of uniformly mixing a supernatant solution A containing Se with turbid liquid containing the titanium dioxide nanoribbon and the Mo source, performing a hydrothermal reaction at the temperature of 190-210 DEG C and then performing solid liquid separation; cleaning and drying the obtained solid, and calcining the solid under a protective atmosphere at the temperature of 600-700 DEG C to obtain the molybdenum diselenide / titanium dioxide composite material. The designed and prepared molybdenum diselenide / titanium dioxide composite material can be widely applied to the battery electrode materials. The preparation method is simple and easy, high in repeatability and wide in the application prospects.

Description

technical field [0001] The invention relates to a molybdenum diselenide / titanium dioxide composite material and its preparation method and application; it belongs to the technical field of battery electrode material development and design. Background technique [0002] As a new type of negative electrode material, molybdenum diselenide has the advantages of high theoretical capacity, good safety performance, and stable charging and discharging platform. It is one of the most excellent lithium battery negative electrode materials that has attracted much attention in recent years. At the same time, molybdenum disulfide in the form of thin-layer nanosheets has structural advantages such as short lithium ion migration path and large contact area with electrolyte, and has excellent electrochemical performance. However, molybdenum diselenide nanosheets have serious defects during the cycle charge-discharge process, and their volume changes and structure collapses severely, resulti...

Claims

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Application Information

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IPC IPC(8): H01M4/48H01M4/139
CPCH01M4/139H01M4/366H01M4/483Y02E60/10
Inventor 潘军吴函朔马永进吴雨欣陈熹刘华伟
Owner CENT SOUTH UNIV
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