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Preparation method of molybdenum diselenide nanosheet ball-graphene composite material

A technology of molybdenum diselenide and composite materials, which is applied in the direction of hybrid capacitor electrodes, etc., can solve the problems of poor electrical conductivity of molybdenum diselenide nano-sheet balls, and achieve the effects of simple preparation method, increased specific capacitance, and improved conductivity

Inactive Publication Date: 2019-03-08
HARBIN UNIV OF SCI & TECH
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  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the technical problem of poor electrical conductivity of molybdenum diselenide nano flakes, and provides a preparation method of molybdenum diselenide nano flakes-graphene composite material

Method used

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specific Embodiment approach 1

[0022] Specific implementation mode one: the present implementation mode is a kind of preparation method of molybdenum diselenide nano flakes-graphene composite material, specifically carry out according to the following steps:

[0023] 1. Preparation of graphene oxide: Add 0.8~1g of graphite powder and 0.8~1g of sodium nitrate to 46mL of concentrated sulfuric acid in an ice-water bath and stir for 20~30mins, then add 6g of potassium permanganate to the above mixed solution, Stir in an ice-water bath for 40-60mins to obtain a green-purple mixed solution, keep the green-purple mixed solution at 30-40°C for 1 hour, keep stirring moderately during this period, then add 35-45mL of deionized water, at 85 Keep warm at ~95°C for 30-40mins and stop heating to obtain a dark brown mixed solution. Add 100mL deionized water and 6mL of 30-35% hydrogen peroxide to the dark brown mixed solution to obtain a bright yellow mixed solution, and then use The solution was repeatedly washed with hyd...

specific Embodiment approach 2

[0025] Embodiment 2: The difference between this embodiment and Embodiment 1 is that 15-50 mg of graphene oxide obtained in Step 1 is added to 65 mL of deionized water, and the others are the same as Embodiment 1.

specific Embodiment approach 3

[0026] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the graphene oxide suspension containing sodium molybdate is mixed with selenium-hydrazine hydrate solution, stirred for 30mins; °C, hydrothermal reaction for 12 hours, and the others are the same as those in Embodiment 1 or 2.

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Abstract

The invention provides a preparation method of a molybdenum diselenide nanosheet ball-graphene composite material and relates to a preparation method of molybdenum diselenide nanosheet ball-graphene composite material supercapacitor electrode material. The problem that molybdenum diselenide as the supercapacitor electrode material is poor in electrical conductivity. The preparation method comprises the following steps: firstly, preparing graphene oxide, then, mixing the graphene oxide with sodium molybdate, hydrazine hydrate and selenium powder to prepare a mixed solution, and transferring themixed solution into a reaction kettle; a supercapacitor electrode material with high specific surface area and high performance is obtained through a one-step hydrothermal method. The method in the invention has the advantages of being simple in process, high-efficiency, low in cost and the like.

Description

technical field [0001] The invention relates to a preparation method of molybdenum diselenide nano ball-graphene composite material. Background technique [0002] Supercapacitors, also known as electrochemical supercapacitors, have energy storage performance between rechargeable batteries and conventional capacitors. Supercapacitors have the advantages of high charge energy storage, fast charging and discharging speed, high efficiency, environmental protection and long cycle life, and are widely used in electric vehicles, new energy power generation, aerospace and information technology and other fields. According to the energy storage mechanism, it can be divided into electric double layer capacitors and pseudocapacitive capacitors. The main electrode material of an electric double layer capacitor is carbon material, which accumulates charges to store energy through the directional arrangement of electrons or ions at the electrode-electrolyte interface, and does not underg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/30H01G11/36
CPCH01G11/30H01G11/36Y02E60/13
Inventor 岳红彦王钊俞泽民高鑫关恩昊张腾
Owner HARBIN UNIV OF SCI & TECH
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