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Rapid gas-assisted exfoliation promises V 2 O 5 nanosheets for high performance lithium-sulfur batteries

Nano Energy, ISSN: 2211-2855, Vol: 67, Page: 104253
2020
  • 130
    Citations
  • 0
    Usage
  • 36
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    130
    • Citation Indexes
      130
  • Captures
    36

Article Description

Scalable synthesis of ultra-thin two-dimensional (2D) nanomaterials by exfoliation has emerged as an intriguing approach in the energy field. Herein, a rapid thermal expansion-triggered gas-assisted exfoliation method is applied to synthesize ultra-thin 2D V 2 O 5 nanosheets. Unlike other methods, no impurities can be introduced during exfoliation, leading extremely clean 2D nanosheets that are crucial for the investigation of 2D materials in charge-storage fields. The obtained V 2 O 5 nanosheets were used as effective host materials for polysulfides in lithium-sulfur batteries, as they can help to confine and alleviate the shuttle of polysulfides efficiently. The as-prepared V 2 O 5 –S composite electrode delivered an initial discharge capacity of 1638.5 mAh g −1 with a high Coulombic efficiency of 96.7% and maintained a specific capacity of 838.8 mAh g −1 after 200 cycles at 0.1 C current rate. This work supplies a facile approach to obtain transition metal oxides nanosheets, which have potential applications in energy storage and conversion fields.

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