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Preparation method for tungsten disulfide sheet-shaped nanomaterial

A tungsten disulfide flake, nanomaterial technology, used in the manufacture of hybrid/electric double-layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of limited mass production, and achieve the effect of increasing performance, excellent performance and high crystallinity

Inactive Publication Date: 2017-07-14
SUN YAT SEN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And each layer exhibits the characteristics of two-dimensional materials So far, regarding the preparation of WS 2 There are few methods, so mass production is still limited

Method used

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  • Preparation method for tungsten disulfide sheet-shaped nanomaterial
  • Preparation method for tungsten disulfide sheet-shaped nanomaterial
  • Preparation method for tungsten disulfide sheet-shaped nanomaterial

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] WS 2 The synthesis of is realized in one step by hydrothermal method, concrete steps:

[0029] (1) Weigh 0.5635g of thioacetamide in a beaker, add 20ml of water, stir to dissolve, set aside.

[0030] (2) Weigh 0.5950g of tungsten hexachloride solid and add it to the solution of (1) above, continue to stir for one hour, put it into a 25ml high-temperature reaction kettle, add clean (2cm×3cm) commercial carbon cloth, and put it in the oven Reacted in medium for 12h, the reaction temperature was 250°C, and it was taken out.

[0031] Among them, the commercial carbon cloth is pretreated first, and the pretreatment operation is:

[0032] Ultrasonic cleaning with ethanol for 15 minutes, then dissolving 0.759g of sodium tungstate in 12ml of 3M hydrochloric acid, adding 2ml of 30% hydrogen peroxide and stirring until clear as the seed solution. Soak the cleaned commercial carbon cloth in the above seed solution, and grow crystal nuclei on a heating plate at a temperature of ...

Embodiment 2-7

[0035] Based on the scheme of Example 1, by adjusting different reaction conditions, the WS 2 growth conditions are listed in Table 1.

[0036] WS in table 1. embodiment 1~7 2 Regulatory conditions for the growth of flakes

[0037]

[0038] Other preparation conditions in comparative example 1 and 2 are with embodiment 1, and different conditions and results are as shown in table 2:

[0039] Table 2

[0040]

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Abstract

The invention discloses a preparation method for a tungsten disulfide sheet-shaped nanomaterial. The preparation method comprises the steps of mixing sulfosalt, tungsten salt and water, performing reaction in a hydrothermal condition for 12-24h, and carrying out filtering, cleaning and drying to obtain the tungsten disulfide sheet-shaped nanomaterial, wherein the hydrothermal reaction is carried out at a temperature of 180-250 DEG C; the molar ratio of tungsten salt to sulfosalt is 1 to (4.5-5.5); and the sulfosalt is 0.3-0.4mol / L in concentration. The obtained sheet-shaped WS<2> material is 171.819mF / cm<2> (100mv / s) in area capacitance ratio value, and 38.873F / g (100mv / s) in mass capacitance ratio value. The preparation method provided by the invention is low in energy consumption, capable of obtaining raw materials simply and conveniently, simple in operation, and easy to realize; the prepared and obtained flexible sheet-shaped WS<2> material is large in specific surface area, so that active sites on the surface of the electrode can be greatly increased and the capacitance performance of the electrode material is improved; and in addition, by virtue of the unique characteristic of the two-dimensional nanomaterial, shorter electron transfer and ionic diffusion paths can be realized, so that expression of capacitance performance can be facilitated, and effective storage of energy can be realized.

Description

technical field [0001] The invention belongs to the technical field of preparation of energy storage materials, and more specifically relates to a preparation method of tungsten disulfide flake nanomaterials. Background technique [0002] With the application of electrochemical energy storage devices in portable electronic products, hybrid electric vehicles and large-scale industrial-scale power and energy management, it is very important to design and synthesize advanced nano-electrode materials with new structures and superior performance. A member of the device, a supercapacitor is a new, efficient and practical energy storage device with performance between batteries and traditional capacitors. It has fast charging and discharging speed, high power density, long service life, wide operating temperature window, and environmental protection In recent years, due to the unique advantages of flexible supercapacitors, such as flexibility, various shapes, light weight, etc., th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/86
CPCH01G11/24H01G11/30H01G11/86Y02E60/13
Inventor 卢锡洪刘思黄雅兰郑海兵韩奕程发良童叶翔
Owner SUN YAT SEN UNIV
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