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Method for preparing graphene-base superconductive capacitor electrode

A capacitor electrode and graphene-based technology, which is applied in the manufacture of hybrid/electric double layer capacitors, can solve the problems of difficult shape control, short cycle life, and small capacitance, and achieve easy shape control, long cycle life, and high capacitance. big effect

Inactive Publication Date: 2017-06-13
ANHUI SUNROAD ENVIRONMENT PROTECTIVE NEW MATERIALS
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AI Technical Summary

Problems solved by technology

Improve the inherent shortcomings of graphene electrodes (such as small capacitance, poor conductivity, short cycle life, and difficult morphology control)

Method used

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Embodiment Construction

[0015] A method for preparing a graphene-based superconducting container electrode, the preparation steps are:

[0016] (a) dispersing graphene in a liquid medium to prepare a graphene dispersion, which contains a blowing agent;

[0017] (b) depositing the dispersion onto a substrate to form a liquid film;

[0018] (c) removing said liquid medium to form a layer of dry graphene material;

[0019] (d) heat-treating the dry layer at a temperature of 1200° C. to volatilize non-carbon volatile gas molecules, and to cause the foaming agent to foam, thereby producing a solid graphene foam layer; the physical properties of the graphene foam layer The density is 1.2g / cm 3 , the specific surface area is 1500m 2 / g;

[0020] (e) impregnating the graphene foam layer with an electrolyte to form a pre-impregnated graphene foam layer, and then compressing to form the graphene-based superconducting container electrode.

[0021] The foaming agent is one or more of sodium lauryl sulfate, ...

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Abstract

The invention discloses a method for preparing a graphene-base superconductive capacitor electrode. The method comprises steps of: (a) dispersing graphene in a liquid medium to prepare graphene dispersions containing a foaming agent; (b) depositing the dispersions on a base material to form a liquid film; (c) removing the liquid medium to form a dry graphene material layer; (d) thermally treating the dry layer at a temperature of 85 to 2500 degrees centigrade so that non-carbon volatile gas molecules volatilizes and the foaming agent foams to generate a grapheme foam layer; and (e) impregnating the graphene foam layer with an electrolyte to form a pre-impregnated graphene foam layer and then compressing the pre-impregnated graphene foam layer to form the grapheme-base superconductive capacitor electrode. The method subjects the graphene to foaming treatment to improve specific surface area and load capacity and to achieve good electrical conductivity and large capacity, and then performs pressing to achieve high tap density, large energy density, high active load, a long cycle life, and easy shape control.

Description

technical field [0001] The invention relates to the technical field of graphene-based superconducting container electrodes, in particular to a method for preparing graphene-based superconducting container electrodes. Background technique [0002] Energy and the environment are two major themes of human development today. Human beings urgently need a renewable, green and clean new energy storage device to face the increasing depletion of non-renewable resources and the aggravation of environmental pollution. As a new type of energy storage device that combines the advantages of traditional capacitors and secondary batteries, supercapacitors can provide higher energy density than traditional capacitors, as well as better power density and cycle life than secondary batteries, and are expected to be widely used in Energy conversion, aerospace systems, communication engineering and microelectronic devices and other fields. As we all know, the electrode material is the core comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86
CPCY02E60/13H01G11/86
Inventor 张颖鹤黄俊峰
Owner ANHUI SUNROAD ENVIRONMENT PROTECTIVE NEW MATERIALS
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