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Direct exfoliation of the anode graphite of used Li-ion batteries into few-layer graphene sheets: a green and high yield route to high-quality graphene preparation

Journal of Materials Chemistry A, ISSN: 2050-7496, Vol: 5, Issue: 12, Page: 5880-5885
2017
  • 82
    Citations
  • 0
    Usage
  • 75
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    82
    • Citation Indexes
      82
  • Captures
    75

Article Description

Recycling anode graphite remains a significant barrier to the recovery of used Li-ion batteries. In this study, we show that anode graphite in used lithium-ion batteries is a cheap and ideal candidate for the high yield production of high-quality graphene. Attributed to the reduced interlayer force after repeated charge-discharge cycles, the sonication assisted exfoliation efficiency of the used anode graphite can be 3 to 11 times that of natural graphite, with a highest mass yield of the dispersed graphene sheets of ∼40 wt%. Importantly, the layer numbers of most of the exfoliated graphene sheets are 1-4 , and their lateral sizes are over 1 μm. Their conductivity after annealing at moderate temperature (500 °C) is up to 9100 S m, and their potential application in conductive ink was also demonstrated.

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