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Delocalized electrochemical exfoliation toward high-throughput fabrication of high-quality graphene

Chemical Engineering Journal, ISSN: 1385-8947, Vol: 428, Page: 131122
2022
  • 19
    Citations
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    Usage
  • 20
    Captures
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Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    19
    • Citation Indexes
      19
  • Captures
    20

Article Description

Many of graphene’s industrial applications such as electromagnetic interference (EMI) shielding demand efficient fabrication of high-quality graphene in large scale. Existing electrochemical exfoliation is a trade-off but never an ideal solution in this regard. Herein, we propose a delocalized electrochemical exfoliation (DEE) strategy to revolutionize the way graphite is electrochemically exfoliated. By transmitting the electric potentials with electron transfer reactions, the electrochemical exfoliation is firstly delocalized from electrode/electrolyte interfaces to the whole electrolyte system, thus making deep yet non-destructive exfoliation possible for every dispersed graphite particle. The as-prepared DEE-graphene possesses an ultralow defect density (~1.3 × 10 10 cm −2 ) and significantly high carbon-to-oxygen ratio (~28). Remarkably, record high yields (greater than 98%, 1–10 layers) and production rates (~72.7 g h −1 ) are achieved in up-scaled DEE in a reproducible manner. More importantly, processing this high-quality graphene into membranes with optimal orientation brings a superior EMI shielding performance (1.9 × 10 5 dB cm 2 g −1 ) outperforming the best membranes fabricated from metals and many other 2-D materials including reduced graphene oxide and MXenes. The highly efficient DEE with a fundamentally different mechanism and the effective orientation angle modulation strategy for EMI shielding would inspire research and applications of graphene and other two-dimensional materials.

Bibliographic Details

Penglei Zhang; Peng He; Qingkai Yu; Gang Wang; Tao Huang; Siwei Yang; Zhi Liu; Xiaoming Xie; Guqiao Ding

Elsevier BV

Chemistry; Environmental Science; Chemical Engineering; Engineering

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