Preparation method of flexible electrode material

A flexible electrode and constant current technology, applied in battery electrodes, electrode carriers/current collectors, circuits, etc., can solve problems such as manganese dioxide composite and composite material flexibility, etc., and achieve good reproducibility , good discharge performance and simple process

Inactive Publication Date: 2015-02-18
SOUTH CHINA NORMAL UNIVERSITY
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  • Abstract
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Problems solved by technology

Patent Publication No. CN 102568847 A uses electrodeposition to deposit manganese dioxide on the surface of graphene to prepare manganese dioxide / graphene composite materials for supercapacitors, but does not mention the flexibility of composite materials
Patent Publication No. CN 103762096A discusses the application of positive and negative pulse electrical signals at both ends of the graphene oxide solution to prepare flexible electrode material graphene paper, but does not mention the problem of compounding with manganese dioxide

Method used

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  • Preparation method of flexible electrode material

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[0028] A method of preparing a flexible electrode material, including the following steps:

[0029] 1) Taking graphene film as an electrode material, the aqueous solution of graphene and manganese salt as an electrolyte, regulating electrolytic acidity with sulfuric acid, and sedimentation of constant current method electrochemistry.Composite materials.

[0030] 2) The materials after electrochemical deposition are burned for 1 to 24h under the conditions of 300 ~ 380 ℃, and flexible electrode materials can be obtained after burning.

[0031] Preferably, the concentration of graphene in the above electrolyte is 0.1 to 100 mg / ml, the concentration of sulfuric acid is 0.2 to 1.0 mol / L, and the concentration of manganese salt is 0.15 ~ 1.5 mol / L.

[0032] More preferably, the concentration of graphene in the above electrolyte is 1 to 10 mg / ml, the concentration of sulfuric acid is 0.2 ~ 0.5 mol / L, and the concentration of manganese salt is 0.6 ~ 1.0 mol / L.

[0033] Preferably, the ab...

Embodiment 1

[0042] Take graphene and 100ml of exfoliating water into 250ml to burn the cup, stir with ultrasonic and mechanical stirring for 4h, the dispersing power is 500W, and then add sulfuric acid and manganese sulfate, with 1mg / ml graphene, 0.3m manganese sulfate solutionAs an electrolyte, the electrode material is based on the graphene film, and the electrochemical deposition is used to use the constant current method at a high temperature of 95 ° C. The sedimentary current is 2mA / CM 2 , The deposition time is 2880s; the electrical deposition material is placed in the Marve furnace, burned for 24h under 380 ° C, and the pupae are protected during the burning process, and the wind is used to form a convection.After burning, you can get manganese dioxide / graphene composite flexible electrode material.The thickness of the prepared flexible electrode materials is 0.1mm to 0.5mm, and the mass of manganese dioxide is 60%to 80%.

[0043] Manganese dioxide / graphene compound flexible electrode ...

Embodiment 2

[0049] Take graphene and 100ml of exfoliating water into 250ml to burn the cup, stir with ultrasonic and mechanical stirring for 4h, the dispersing power is 500W, and then add sulfuric acid and manganese sulfate, with 1mg / ml graphene, 0.3m manganese sulfate solutionAs an electrolyte, the electrode material is based on the graphene film, and the electrochemical deposition is used to use the constant current method at a high temperature of 95 ° C. The deposition current is 2mA / CM 2 , The deposition time is 2880s; the electrical deposition material is placed in the Marve furnace, burned for 24h under 300 ° C, and the pimeline is protected during the burning process, and the wind is used to form a convection.After burning, you can get manganese dioxide / graphene composite flexible electrode material. Figure 6 Essence

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Abstract

The invention discloses a preparation method of a flexible electrode material. According to the method, graphene is taken as an electrode material, an aqueous solution of graphene and manganese salt is taken as an electrolytic solution, the acidity of the electrolytic solution is adjusted by sulfuric acid, a manganese dioxide / graphene composite material is loaded onto the surface of a graphene film by an electrochemical deposition process, and the particle size, distribution density and specific surface area of the manganese dioxide / graphene composite material are accurately controlled by adjusting the concentration of the electrolytic solution, current, temperature and time in the electrochemical deposition process, so that the bendable manganese dioxide / graphene composite electrode material with good mechanical property is prepared; the manganese dioxide / graphene composite electrode material subjected to high-temperature calcination is good in electrochemical performance and flexibility, bendable and suitable for manufacturing flexible batteries; electrodes can be directly manufactured without an adhesion agent, a conductive additive and a current collector, so that a complicated coating process is removed and the process is simple.

Description

Technical field [0001] The invention is the field of electrode materials, which involves a preparation method of a flexible electrode material, which involves a preparation method for a manganese dioxide / graphene flexible electrode material. Background technique [0002] In recent years, with the vigorous development of electronic products, flexible energy storage devices have gradually been used to foldable devices, wearable sensors, implanted medical equipment due to the characteristics of thickness, light quality, good quality, good flexibility, and stretching.wait.Generally, the battery is mostly copper foil and aluminum foil as a collector, and the active substances coated on copper foil or aluminum foil are easily separated from the streaming when bending, so these materials cannot be used for flexible batteries.Different from traditional batteries, flexible batteries require the positive, negative, septum and electrolytes of the battery to be flexible.And flexible batterie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/50H01M4/66
CPCH01M4/50H01M4/583Y02E60/10
Inventor 袁中直刘亚柳
Owner SOUTH CHINA NORMAL UNIVERSITY
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