Studies on the Lithium Ion Diffusion Coefficients of Electrospun Nb2O5 Nanostructures Using Galvanostatic Intermittent Titration and Electrochemical Impedance Spectroscopy
We have studied the Li-diffusion coefficient values of electrospun Nb2O5 nanofibers and nanonuggets for lithium batteries. In brief, Nb2O5 nanofibers were prepared by electrospinning followed by sintering at temperatures range 500–1100 °C for 1 h in air to obtain pseudo-hexagonal, orthorhombic (O),...
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| Format: | Article |
| Language: | English |
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Elsevier
2014
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| Online Access: | http://umpir.ump.edu.my/id/eprint/6248/ http://umpir.ump.edu.my/id/eprint/6248/1/fist-2014-rjose-Nb2O5Lidiffusion_abs_only.pdf |
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| author | Rajan, Jose Reddy, M. Venkatashamy Le Viet, Anh Ozoemenad, Kenneth I Chowdary, B. V. R Ramakrishna, S. |
| author_facet | Rajan, Jose Reddy, M. Venkatashamy Le Viet, Anh Ozoemenad, Kenneth I Chowdary, B. V. R Ramakrishna, S. |
| author_sort | Rajan, Jose |
| building | UMP Institutional Repository |
| collection | Online Access |
| description | We have studied the Li-diffusion coefficient values of electrospun Nb2O5 nanofibers and nanonuggets for lithium batteries. In brief, Nb2O5 nanofibers were prepared by electrospinning followed by sintering at temperatures range 500–1100 °C for 1 h in air to obtain pseudo-hexagonal, orthorhombic (O), and monoclinic (M) Nb2O5 phases. Electrochemical properties were evaluated by galvanostatic technique at room temperature. The H-, O- and M-Nb2O5 polymorphs delivered discharge capacities (at second cycle) of 152, 189 and 242 (±5) mA h g−1, respectively. The lithium diffusion coefficients (DLi) are calculated using galvanostatic intermittent titration technique (GITT) and electrochemical impedance spectroscopy (EIS) techniques carried at room temperature. The evaluated DLi values by GITT for H-, O-, and M-Nb2O5 phases are in the range 10−17–10−16, 10−15–10−14, and 10−13–10−12 cm2 s−1, respectively, in the voltage range 1.0–2.6 V vs. Li. DLi evaluated by EIS gave similar trend in the values but with a difference of one order higher magnitude. |
| first_indexed | 2025-11-15T01:26:22Z |
| format | Article |
| id | ump-6248 |
| institution | Universiti Malaysia Pahang |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T01:26:22Z |
| publishDate | 2014 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | ump-62482018-02-19T07:37:46Z http://umpir.ump.edu.my/id/eprint/6248/ Studies on the Lithium Ion Diffusion Coefficients of Electrospun Nb2O5 Nanostructures Using Galvanostatic Intermittent Titration and Electrochemical Impedance Spectroscopy Rajan, Jose Reddy, M. Venkatashamy Le Viet, Anh Ozoemenad, Kenneth I Chowdary, B. V. R Ramakrishna, S. QD Chemistry We have studied the Li-diffusion coefficient values of electrospun Nb2O5 nanofibers and nanonuggets for lithium batteries. In brief, Nb2O5 nanofibers were prepared by electrospinning followed by sintering at temperatures range 500–1100 °C for 1 h in air to obtain pseudo-hexagonal, orthorhombic (O), and monoclinic (M) Nb2O5 phases. Electrochemical properties were evaluated by galvanostatic technique at room temperature. The H-, O- and M-Nb2O5 polymorphs delivered discharge capacities (at second cycle) of 152, 189 and 242 (±5) mA h g−1, respectively. The lithium diffusion coefficients (DLi) are calculated using galvanostatic intermittent titration technique (GITT) and electrochemical impedance spectroscopy (EIS) techniques carried at room temperature. The evaluated DLi values by GITT for H-, O-, and M-Nb2O5 phases are in the range 10−17–10−16, 10−15–10−14, and 10−13–10−12 cm2 s−1, respectively, in the voltage range 1.0–2.6 V vs. Li. DLi evaluated by EIS gave similar trend in the values but with a difference of one order higher magnitude. Elsevier 2014 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/6248/1/fist-2014-rjose-Nb2O5Lidiffusion_abs_only.pdf Rajan, Jose and Reddy, M. Venkatashamy and Le Viet, Anh and Ozoemenad, Kenneth I and Chowdary, B. V. R and Ramakrishna, S. (2014) Studies on the Lithium Ion Diffusion Coefficients of Electrospun Nb2O5 Nanostructures Using Galvanostatic Intermittent Titration and Electrochemical Impedance Spectroscopy. Electrochimica Acta, 128. pp. 198-202. ISSN 0013-4686. (Published) http://dx.doi.org/10.1016/j.electacta.2013.10.003 DOI: 10.1016/j.electacta.2013.10.003 |
| spellingShingle | QD Chemistry Rajan, Jose Reddy, M. Venkatashamy Le Viet, Anh Ozoemenad, Kenneth I Chowdary, B. V. R Ramakrishna, S. Studies on the Lithium Ion Diffusion Coefficients of Electrospun Nb2O5 Nanostructures Using Galvanostatic Intermittent Titration and Electrochemical Impedance Spectroscopy |
| title | Studies on the Lithium Ion Diffusion Coefficients of Electrospun Nb2O5 Nanostructures Using Galvanostatic Intermittent Titration and Electrochemical Impedance Spectroscopy |
| title_full | Studies on the Lithium Ion Diffusion Coefficients of Electrospun Nb2O5 Nanostructures Using Galvanostatic Intermittent Titration and Electrochemical Impedance Spectroscopy |
| title_fullStr | Studies on the Lithium Ion Diffusion Coefficients of Electrospun Nb2O5 Nanostructures Using Galvanostatic Intermittent Titration and Electrochemical Impedance Spectroscopy |
| title_full_unstemmed | Studies on the Lithium Ion Diffusion Coefficients of Electrospun Nb2O5 Nanostructures Using Galvanostatic Intermittent Titration and Electrochemical Impedance Spectroscopy |
| title_short | Studies on the Lithium Ion Diffusion Coefficients of Electrospun Nb2O5 Nanostructures Using Galvanostatic Intermittent Titration and Electrochemical Impedance Spectroscopy |
| title_sort | studies on the lithium ion diffusion coefficients of electrospun nb2o5 nanostructures using galvanostatic intermittent titration and electrochemical impedance spectroscopy |
| topic | QD Chemistry |
| url | http://umpir.ump.edu.my/id/eprint/6248/ http://umpir.ump.edu.my/id/eprint/6248/ http://umpir.ump.edu.my/id/eprint/6248/ http://umpir.ump.edu.my/id/eprint/6248/1/fist-2014-rjose-Nb2O5Lidiffusion_abs_only.pdf |