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Graphene-based films

一种烯基膜、石墨烯的技术，应用在包含石墨烯基膜的制品或装置,制备石墨烯基膜领域，能够解决调整膜性质不是特别有效等问题

Inactive Publication Date: 2015-12-02
MONASH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the removal of liquid media from gel films to tune the film properties has not been particularly effective so far.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0194] Materials, Methods and Results:

[0195] (a) Preparation of chemically converted graphene dispersion

[0196] Graphene oxide (GO) was synthesized from graphite (SP-1, BayCarbon) using a modified Hummers method originally proposed by Kovtyukhova and co-workers. Graphite powder (5g) was placed in concentrated H at 80°C 2 SO 4 (7.5ml), K 2 S 2 o 8 (2.5g) and P 2 o 5 (2.5g) in solution. The resulting dark blue mixture was cooled to room temperature over a period of 6 hours, then carefully diluted with distilled water, filtered and washed until the pH of the filtrate was close to 7 (used in all experiments). water). Dry the peroxidized product in a 50 °C oven overnight and place it in cold (0 °C) concentrated H 2 SO 4 (115ml). Gradually add KMnO with stirring 4 (15 g) and keep the temperature of the mixture below 20°C. The mixture was then stirred at 35°C for 2 hours. 230ml of water were added to the mixture and after 15 minutes more water (700ml) and 30% H...

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Abstract

This present invention relates to a method of preparing graphene-based film, said method comprising: providing a first graphene-based film comprising sheets of graphene, graphene oxide, partially reduced graphene oxide, reduced graphene oxide, or a combination of two or more thereof, that are (i) arranged relative to each other in a substantially planar manner so as to form a layered structure, and (ii) at least partially separated by a liquid medium; exchanging said liquid medium with a packing density adjustment medium that comprises at least two components, wherein one of said components has a volatility greater than the other component; and removing at least some of the more volatile component from the first graphene-based film to produce a graphene-based film that has a different packing density of the graphene-based sheets relative to that of the first graphene-based film.

Description

field of invention [0001] The present invention relates generally to graphene-based materials. More particularly, the present invention relates to methods of preparing graphene-based films, to graphene-based films, and to articles or devices comprising graphene-based films. Graphene-based films according to the invention are particularly suitable for use in energy storage systems such as supercapacitors, and it will therefore be convenient to describe the invention focusing on this application. It will be appreciated, however, that the graphene-based film may be used in a number of other applications. Background of the invention [0002] graphene as sp 2 - Two-dimensional (2D) sheet structures of bonded carbon atoms with unique electronic, chemical and mechanical properties. The importance of these unique properties is only now being recognized: graphene-based membranes can find applications in a variety of fields, such as energy storage, catalysis, sensing, filtration, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/00C01B31/02B82Y40/00
CPCH01G11/36B82Y40/00C01B31/043C01B31/0438C01B32/182C01B32/194C01B32/198C01B32/22C01B32/225C01B32/23C01B2204/22H01G11/32Y02E60/13
Inventor 李丹杨晓伟
Owner MONASH UNIV
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