Morphology, structure and electrochemical properties of single phase electrospun vanadium pentoxide nanofibers for lithium ion batteries
One-dimensional (1D) vanadium pentoxide (V2O5) nanofibers (VNF) are synthesized by electrospinning vanadium sol–gel precursors containing vanadyl acetylacetonate and poly(vinylpyrrolidone) followed by sintering. Crystal structure, molecular structure and morphology of electrospun VNF are analyzed us...
| Principais autores: | , , , , , |
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| Outros Autores: | |
| Formato: | Journal Article |
| Idioma: | English |
| Publicado em: |
2011
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| Assuntos: | |
| Acesso em linha: | https://hdl.handle.net/10356/94317 http://hdl.handle.net/10220/7028 |
| _version_ | 1826109770039296000 |
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| author | Cheah, Yan Ling Gupta, Nutan Pramana, Stevin S. Aravindan, Vanchiappan Wee, Grace Srinivasan, Madhavi |
| author2 | School of Materials Science & Engineering |
| author_facet | School of Materials Science & Engineering Cheah, Yan Ling Gupta, Nutan Pramana, Stevin S. Aravindan, Vanchiappan Wee, Grace Srinivasan, Madhavi |
| author_sort | Cheah, Yan Ling |
| collection | NTU |
| description | One-dimensional (1D) vanadium pentoxide (V2O5) nanofibers (VNF) are synthesized by electrospinning vanadium sol–gel precursors containing vanadyl acetylacetonate and poly(vinylpyrrolidone) followed by sintering. Crystal structure, molecular structure and morphology of electrospun VNF are analyzed using field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), selected area diffraction (SAED), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). Single-phase electrospun VNF not, vert, similar300–800 nm in diameter, 20–50 μm long (aspect ratio > 50) with porous interconnected fibrous morphology are revealed by FESEM and TEM analysis. Electrochemical properties of the sintered VNF, as a cathode in lithium-ion batteries, explored using cyclic voltammetry (CV), galvanostatic charge/discharge and electrochemical impedance spectroscopy (EIS) give rise to new understandings of the electrochemical processes occurring in these nanofibrous cathodes. Electrospun VNF exhibits initial discharge capacity not, vert, similar316 mAh g−1 (not, vert, similar2.2 Li per V2O5) in the voltage range of 1.75 and 4.0 V vs. Li/Li+ at 0.1 C rate. When cycled at a reduced voltage range of 2.0–4.0 V vs. Li/Li+, less phase transitions occur, giving rise to the initial specific capacity of 308 mAh g−1 and improved cyclic retention of 74% after 50 cycles. |
| first_indexed | 2024-10-01T02:23:24Z |
| format | Journal Article |
| id | ntu-10356/94317 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:23:24Z |
| publishDate | 2011 |
| record_format | dspace |
| spelling | ntu-10356/943172021-01-10T11:22:26Z Morphology, structure and electrochemical properties of single phase electrospun vanadium pentoxide nanofibers for lithium ion batteries Cheah, Yan Ling Gupta, Nutan Pramana, Stevin S. Aravindan, Vanchiappan Wee, Grace Srinivasan, Madhavi School of Materials Science & Engineering Energy Research Institute @ NTU (ERI@N) DRNTU::Engineering::Materials One-dimensional (1D) vanadium pentoxide (V2O5) nanofibers (VNF) are synthesized by electrospinning vanadium sol–gel precursors containing vanadyl acetylacetonate and poly(vinylpyrrolidone) followed by sintering. Crystal structure, molecular structure and morphology of electrospun VNF are analyzed using field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), selected area diffraction (SAED), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). Single-phase electrospun VNF not, vert, similar300–800 nm in diameter, 20–50 μm long (aspect ratio > 50) with porous interconnected fibrous morphology are revealed by FESEM and TEM analysis. Electrochemical properties of the sintered VNF, as a cathode in lithium-ion batteries, explored using cyclic voltammetry (CV), galvanostatic charge/discharge and electrochemical impedance spectroscopy (EIS) give rise to new understandings of the electrochemical processes occurring in these nanofibrous cathodes. Electrospun VNF exhibits initial discharge capacity not, vert, similar316 mAh g−1 (not, vert, similar2.2 Li per V2O5) in the voltage range of 1.75 and 4.0 V vs. Li/Li+ at 0.1 C rate. When cycled at a reduced voltage range of 2.0–4.0 V vs. Li/Li+, less phase transitions occur, giving rise to the initial specific capacity of 308 mAh g−1 and improved cyclic retention of 74% after 50 cycles. Accepted version 2011-09-08T08:51:14Z 2019-12-06T18:54:04Z 2011-09-08T08:51:14Z 2019-12-06T18:54:04Z 2011 2011 Journal Article Cheah, Y. L., Gupta, N., Pramana, S. S., Aravindan, V., Wee, G., & Srinivasan, M. (2011). Morphology, Structure and Electrochemical Properties of Single Phase Electrospun Vanadium Pentoxide Nanofibers for Lithium Ion Batteries. Journal of Power Sources, 196, 6465-6472. 0378-7753 https://hdl.handle.net/10356/94317 http://hdl.handle.net/10220/7028 10.1016/j.jpowsour.2011.03.039 158358 en Journal of power sources © 2011 Elsevier. This is the author created version of a work that has been peer reviewed and accepted for publication by Journal of Power Sources, Elsevier. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: http://dx.doi.org/10.1016/j.jpowsour.2011.03.039. 8 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Materials Cheah, Yan Ling Gupta, Nutan Pramana, Stevin S. Aravindan, Vanchiappan Wee, Grace Srinivasan, Madhavi Morphology, structure and electrochemical properties of single phase electrospun vanadium pentoxide nanofibers for lithium ion batteries |
| title | Morphology, structure and electrochemical properties of single phase electrospun vanadium pentoxide nanofibers for lithium ion batteries |
| title_full | Morphology, structure and electrochemical properties of single phase electrospun vanadium pentoxide nanofibers for lithium ion batteries |
| title_fullStr | Morphology, structure and electrochemical properties of single phase electrospun vanadium pentoxide nanofibers for lithium ion batteries |
| title_full_unstemmed | Morphology, structure and electrochemical properties of single phase electrospun vanadium pentoxide nanofibers for lithium ion batteries |
| title_short | Morphology, structure and electrochemical properties of single phase electrospun vanadium pentoxide nanofibers for lithium ion batteries |
| title_sort | morphology structure and electrochemical properties of single phase electrospun vanadium pentoxide nanofibers for lithium ion batteries |
| topic | DRNTU::Engineering::Materials |
| url | https://hdl.handle.net/10356/94317 http://hdl.handle.net/10220/7028 |
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