A green and ultrafast approach to the synthesis of scalable graphene nanosheets with Zn powder for electrochemical energy storage

We developed a novel and ultrafast method to reduce graphene oxide (GO) with Zn powder in mild alkaline conditions under ultrasonication only for 10 min at room temperature. The as-prepared graphene nanosheets (GNs) are characterized by scanning electron microscopy, transmission electron microscopy,...

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Bibliographic Details
Published in:Journal of materials chemistry 2011-01, Vol.21 (39), p.15449-15455
Main Authors: Liu, Yanzhen, Li, Yongfeng, Zhong, Ming, Yang, Yonggang, Yuefang Wen, Wang, Maozhang
Format: Article
Language:English
Subjects:
Capacitance
Energy storage
Graphene
Nanocomposites
Nanomaterials
Nanostructure
Scanning electron microscopy
Zinc
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Summary:We developed a novel and ultrafast method to reduce graphene oxide (GO) with Zn powder in mild alkaline conditions under ultrasonication only for 10 min at room temperature. The as-prepared graphene nanosheets (GNs) are characterized by scanning electron microscopy, transmission electron microscopy, atomic force microscopy, X-ray photoelectron spectroscopy and so on. Moreover, we proposed the reducing mechanism under which Zn powder and GO formed numerous Zn-GO primary batteries in the presence of ammonia solution, which can effectively remove a significant fraction of the oxygen-containing functional groups and yield a C/O ratio as high as 8.09 and 8.58 reduced by ultrasonication for 10 min and 60 min, respectively. A maximum specific capacitance of 116 F g-1 in an aqueous KOH electrolyte solution has been obtained. This approach presents us with a possibility for an environmentally friendly, ultrafast, low-cost and large-scale production of GNs and great potentials in electrochemical energy storage applications of graphene-based materials.
ISSN:0959-9428
1364-5501
DOI:10.1039/c1jm12599k