Rapid gas-assisted exfoliation promises V2O5 nanosheets for high performance lithium-sulfur batteries
- Jiangsu Univ., Zhenjiang (China)
- Xi'an Jiaotong Univ. (China)
- Jiangsu Univ., Zhenjiang (China); Univ. of Tennessee, Knoxville, TN (United States)
- 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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