Composite material based on nanometer, preparation method of composite material and application in flexible energy storage device

A nano-composite material and composite material technology, applied in the field of electrochemical energy storage devices, can solve the problems of difficult bending and deformation of energy storage devices, unable to meet the development needs of flexible electronic devices, etc., to improve specific capacity per unit mass, good mechanical strength, The effect of high specific capacity

Inactive Publication Date: 2012-04-04
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to meet the development needs of flexible electronic products, the purpose of the present invention is to provide a nanocomposite material and its preparation method and its application in flexible energy storage devices, which have the ability to be flexible, bendable and electrochemical energy storage, and solve the problem of traditional The energy storage device is difficult to bend and deform, which cannot meet the needs of the future development of flexible electronic devices

Method used

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  • Composite material based on nanometer, preparation method of composite material and application in flexible energy storage device
  • Composite material based on nanometer, preparation method of composite material and application in flexible energy storage device
  • Composite material based on nanometer, preparation method of composite material and application in flexible energy storage device

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Embodiment 1

[0036] By ultrasonic dispersion method or stirring dispersion method, graphene (1~50 layers) is dissolved in NMP (nitromethylpyrrolidone) solution, forms stable graphene solution (solution concentration 0.01~1mg / mL); In this embodiment , the concentration of graphene in the solution is 0.03mg / mL.

[0037] Use commercial filter paper (medium-speed qualitative filter paper) as the filter medium, filter 300mL graphene solution by vacuum filtration, and repeatedly filter until the black graphene solution becomes colorless, take out the filter paper and dry it at 120°C for 12 hours to obtain graphene / Paper Nanocomposites.

[0038] In the graphene / paper nanocomposite material of this embodiment, graphene accounts for 7.5% by mass of the composite material, and the rest is paper fiber; the composite material is a disc with a radius of 18 mm and a thickness of 200 μm.

[0039] The obtained nanocomposite material was cut into discs (13 mm in diameter) as electrode sheets, Au sheet a...

Embodiment 2

[0045] The difference from Example 1 is:

[0046] By ultrasonic dispersion method or stirring dispersion method, graphene (1~50 layers) is dissolved in NMP (nitromethylpyrrolidone) solution, forms stable graphene solution; In the present embodiment, the concentration of graphene in the solution is 0.3 mg / mL.

[0047] Use commercial filter paper (medium-speed qualitative filter paper) as the filter medium, filter 150mL graphene solution by vacuum filtration, and repeatedly filter until the black graphene solution becomes colorless, take out the filter paper and dry it at 120°C for 12 hours to obtain different graphites Graphene / paper nanocomposites with high alkene content.

[0048] In the graphene / paper nanocomposite material of this embodiment, graphene accounts for 3.1% by mass of the composite material, and the rest is paper fiber; the composite material is a disc with a radius of 18 mm and a thickness of 190 μm.

[0049] In this embodiment, the tensile strength of the co...

Embodiment 3

[0051] The difference from Example 1 is:

[0052] By ultrasonic dispersion method or stirring dispersion method, graphene (1~50 layers) is dissolved in NMP (nitromethylpyrrolidone) solution, forms stable graphene solution; In the present embodiment, the concentration of graphene in the solution is 0.3 mg / mL.

[0053] Use cotton fiber as the filter medium, filter 300mL graphene solution by vacuum filtration, and repeatedly filter until the black graphene solution becomes colorless, take out the cotton fiber and dry it at 120°C for 12 hours to obtain a graphene / cotton fiber nanocomposite Material.

[0054] In the graphene / cotton fiber nanocomposite material of this embodiment, graphene accounts for 5.6% by mass of the composite material, and the rest is cotton fiber.

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Abstract

The invention relates to the field of chemical energy storage devices such as super capacitors, batteries and the like, and particularly discloses a composite material based on nanometer, a preparation method of the composite material and application in a flexible energy storage device, which solve the problem that common energy storage devices are difficult to be bent and deform. Nanometer active materials are compounded with flexible fibers, high-energy-storage characteristics of the nanometer active materials and excellent flexibility of flexible fiber materials are integrated, the quality percentage of the nanometer active materials ranges from 0.1% to 40%, the rest components of the composite material are the flexible fibers, the flexible nanometer composite material in a three-dimensional communication network structure is formed, furthermore, the composite material can be used as an electrode active material and a current collector simultaneously so as to be assembled to form the bendable flexible energy storage device, higher specific capacity can be realized under a bending condition and is equivalent to that when the flexible energy storage device is not bent, and the composite material can be expected to be applied to the field of flexible devices in the future.

Description

technical field [0001] The invention relates to the field of electrochemical energy storage devices such as supercapacitors and batteries, in particular to a nanocomposite-based material and its preparation method and its application in flexible energy storage devices (supercapacitors or batteries). Background technique [0002] Electrochemical energy storage is a widely used form of energy storage, especially in the fields of electronics industry, power machinery, electric vehicles and national defense industry as the only or important way of energy storage has played a huge role. Electrochemical energy storage mainly includes supercapacitors and batteries. The former mainly relies on the adsorption of electrolyte ions on the surface of electrode materials and surface Faraday reaction energy storage. It has high power density, long cycle life and fast charge and discharge capabilities. Safe and pollution-free; the latter mainly relies on the chemical reaction or phase chang...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/24H01B13/00H01G9/02H01G9/042H01M4/66
CPCY02E60/12Y02E60/10
Inventor 成会明翁哲李峰苏阳
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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