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
- 130Citations
- 36Captures
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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.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S2211285519309607; http://dx.doi.org/10.1016/j.nanoen.2019.104253; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85075350526&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S2211285519309607; https://api.elsevier.com/content/article/PII:S2211285519309607?httpAccept=text/xml; https://api.elsevier.com/content/article/PII:S2211285519309607?httpAccept=text/plain; https://dul.usage.elsevier.com/doi/; https://dx.doi.org/10.1016/j.nanoen.2019.104253
Elsevier BV
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