High-Efficiency Production of Large-Size Few-Layer Graphene Platelets via Pulsed Discharge of Graphite Strips.

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ID: 74222
2019
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Abstract
The synthesis of large-size graphene materials is still a central focus of research into additional potential applications in various areas. In this study, large-size graphene platelets were successfully produced by pulsed discharge of loose graphite strips with a dimension of 2 mm × 0.5 mm × 80 mm in distilled water. The graphite strips were made by pressing and cutting well-oriented expanded graphite paper. The recovered samples were characterized by various techniques, including TEM, SEM, optical microscopy (OM), atomic force microscopy (AFM), XRD and Raman spectroscopy. Highly crystalline graphene platelets with a lateral dimension of 100-200 μm were identified. The high yield of recovered graphene platelets is in a range of 90-95%. The results also indicate that increasing charging voltage improves the yield of graphene platelets and decreases the number of graphitic layers in produced graphene platelets. The formation mechanism of graphene platelets was discussed. This study provides a one-step cost-effective route to prepare highly crystalline graphene platelets with a sub-millimeter lateral size.
Reference Key
gao2019highefficiencynanomaterials Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Gao, Xin;Hiraoka, Tomomasa;Ohmagari, Shunsuke;Tanaka, Shigeru;Sheng, Zemin;Liu, Kaiyuan;Xu, Meng;Chen, Pengwan;Hokamoto, Kazuyuki;
Journal Nanomaterials
Year 2019
DOI
E1785
URL
Keywords
graphene graphite strip large size pulsed wire discharge finite element modeling friction stir spot welding post-buckling analysis thin-walled structure sports smoking ireland policy tobacco

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