Please use this identifier to cite or link to this item:
|Title:||Studies on the lithium ion diffusion coefficients of electrospun Nb 2O5 nanostructures using galvanostatic intermittent titration and electrochemical impedance spectroscopy||Authors:||Reddy, M.V.
Le Viet, A.
|Issue Date:||10-May-2014||Citation:||Reddy, M.V., Jose, R., Le Viet, A., Ozoemena, K.I., Chowdari, B.V.R., Ramakrishna, S. (2014-05-10). Studies on the lithium ion diffusion coefficients of electrospun Nb 2O5 nanostructures using galvanostatic intermittent titration and electrochemical impedance spectroscopy. Electrochimica Acta 128 : 198-202. ScholarBank@NUS Repository. https://doi.org/10.1016/j.electacta.2013.10.003||Abstract:||We have studied the Li-diffusion coefficient values of electrospun Nb 2O5 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) Nb 2O5 phases. Electrochemical properties were evaluated by galvanostatic technique at room temperature. The H-, O- and M-Nb 2O5 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-Nb2O 5 phases are in the range 10-17-10-16, 10 -15-10-14, and 10-13-10-12 cm 2 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. © 2013 Elsevier Ltd.||Source Title:||Electrochimica Acta||URI:||http://scholarbank.nus.edu.sg/handle/10635/98080||ISSN:||00134686||DOI:||10.1016/j.electacta.2013.10.003|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Apr 2, 2020
WEB OF SCIENCETM
checked on Mar 17, 2020
checked on Mar 29, 2020
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.