Interlayer catalytic exfoliation realizing scalable production of large-size pristine few-layer graphene

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Xiumei Geng ; Yufen Guo ; Dongfang Li ; Weiwei Li ; Chao Zhu ; Xiangfei Wei ; Mingliang Chen ; Song Gao ; Shengqiang Qiu ; Youpin Gong ; Liqiong Wu ; Mingsheng Long ; Mengtao Sun ; Gebo Pan ; Liwei Liu (2013)
  • Publisher: Nature Publishing Group
  • Journal: Scientific Reports, volume 3 (issn: 2045-2322, eissn: 2045-2322)
  • Related identifiers: doi: 10.1038/srep01134, pmc: PMC3555088
  • Subject: Article

Mass production of reduced graphene oxide and graphene nanoplatelets has recently been achieved. However, a great challenge still remains in realizing large-quantity and high-quality production of large-size thin few-layer graphene (FLG). Here, we create a novel route to solve the issue by employing one-time-only interlayer catalytic exfoliation (ICE) of salt-intercalated graphite. The typical FLG with a large lateral size of tens of microns and a thickness less than 2 nm have been obtained by a mild and durative ICE. The high-quality graphene layers preserve intact basal crystal planes owing to avoidance of the degradation reaction during both intercalation and ICE. Furthermore, we reveal that the high-quality FLG ensures a remarkable lithium-storage stability (>1,000 cycles) and a large reversible specific capacity (>600 mAh g−1). This simple and scalable technique acquiring high-quality FLG offers considerable potential for future realistic applications.
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