Improved cyclability of lithium-ion battery anode using encapsulated V2O3 nanostructures in well-graphitized carbon fiber
A novel one-dimensional (1D) V2O3@carbon nanocomposite has been successfully synthesized for the first time. In the synthesis procedure, the previously obtained V2O5·xH2O nanobelts act as template. By coating the nanobelts with a layer of polymerized C species under hydrothermal conditions followed...
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| Main Authors: | , , , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
2013
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| Online Access: | https://hdl.handle.net/10356/97276 http://hdl.handle.net/10220/10535 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | A novel one-dimensional (1D) V2O3@carbon nanocomposite has been successfully synthesized for the first time. In the synthesis procedure, the previously obtained V2O5·xH2O nanobelts act as template. By coating the nanobelts with a layer of polymerized C species under hydrothermal conditions followed by a calcination treatment at elevated temperature in an inert atmosphere, the V2O3@carbon nanocomposite was finally obtained. This nanocomposite consists of a well-graphitized carbon layer encapsulating the V2O3 nanostructures. The as-synthesized V2O3@carbon nanocomposite exhibits improved electrochemical performance in Li-ion batteries as the anode, showing enhanced stability, reversibility and cyclability in long-term cycles. At least a 98.5% capacity retention (660 mAh g−1) was observed after high-rate galvanostatic measurements (250 cycles). These results indicate that the V2O3@carbon nanocomposite is a promising candidate as an anode material for next generation Li-ion batteries. In addition, this nanocomposite may also be a promising material for other important applications such as supercapacitors. |
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