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Rapid gas-assisted exfoliation promises V2O5 nanosheets for high performance lithium-sulfur batteries

Journal Article · · Nano Energy
 [1];  [2];  [1];  [1];  [2];  [3];  [1];  [1];  [1];  [4]
  1. Jiangsu Univ., Zhenjiang (China)
  2. Xi'an Jiaotong Univ. (China)
  3. Jiangsu Univ., Zhenjiang (China); Univ. of Tennessee, Knoxville, TN (United States)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Scalable synthesis of ultra-thin two-dimensional (2D) nanomaterials by exfoliation has emerged as an intriguing approach in the energy field. In this work, a rapid thermal expansion-triggered gas-assisted exfoliation method is applied to synthesize ultra-thin 2D V2O5 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 V2O5 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 V2O5–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.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
National Natural Science Foundation of China (NNSFC); Natural Science Foundation of Shaanxi Province in China; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1609041
Alternate ID(s):
OSTI ID: 1580535
Journal Information:
Nano Energy, Journal Name: Nano Energy Journal Issue: C Vol. 67; ISSN 2211-2855
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (1)

Molten salt assisted assembly growth of atomically thin boron carbon nitride nanosheets for photocatalytic H 2 evolution journal January 2020

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