期刊
NANO ENERGY
卷 67, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2019.104253
关键词
Gas-assisted exfoliation; Vanadium pentoxide; Nanosheets; Lithium-sulfur batteries
类别
资金
- National Natural Science Foundation of China [21722604, 21808092, 21978231]
- Natural Science Foundation of Shaanxi Province in China [2017ZDJC-30]
- Fundamental Research Funds for the Central Universities in China
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division
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 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 asprepared 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.
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