High-quality and solution processable graphene sheets are produced by a simple electrochemical exfoliation method and employed as a high-power anode for lithium-ion batteries (LIBs). The electrochemically exfoliated graphene (EEG) composed of a few layers of graphene sheets, have low oxygen content and high C/O ratio (~ 14.9). The LIBs with EEG anode exhibit ultrafast lithium storage and excellent cycling stability, but low initial efficiency. The excellent rate capability and cycling stability are attributed to the favorable structural and chemical properties of the EEG, but the large irreversibility needs to be overcome for practical applications.

Abstract
    1 Introduction
    2 Experimental
        2.1 Materials
        2.2 Electrochemical exfoliation of graphite
        2.3 Characterization of EEG
        2.4 Electrochemical measurements
    3 Results and discussion
    4 Conclusion
    Acknowledgements 
    References

• Duc‑Luong Vu(Department of Energy Engineering, Dankook University)
• Yeon Ju Kwon(Carbon Industry Frontier Research Center, Korea Research Institute of Chemical Technology (KRICT))
• Soon Chang Lee(Department of Chemical Engineering and Applied Chemistry, Chungnam National University)
• Jea Uk Lee(Carbon Industry Frontier Research Center, Korea Research Institute of Chemical Technology (KRICT))
• Jae‑Won Lee(Department of Energy Engineering, Dankook University)