Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 22, Issue 21, Pages 10452-10456Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2jm00092j
Keywords
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Funding
- National Natural Science Foundation of China [51172205, 51002138]
- Natural Science Foundation of Zhejiang Province [Y4090223, Y4090420, Y4110523]
- 'Qianjiang Scholars' program of Zhejiang Province
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In this communication, we report a facile and novel molten salt electrolysis method to prepare high-quality graphene sheets. Transmission electron microscopy (TEM) and atomic force microscopy (AFM) confirmed that the final products exfoliated from the electrolysis of graphite cathode in the molten LiOH medium are mainly graphene sheets (approx. 80 wt% conversion efficiency). Raman spectroscopy revealed that the as-formed graphene sheets have significantly low density of defects. Based on these observations, the exfoliation mechanism of graphite cathode into graphene sheets through lithium intercalation-expansion-microexplosion processes was proposed. The discovery of a molten salt electrolysis method presents us with the possibility for large scale and continuous production of graphene.
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