Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.electacta.2010.10.047
DC FieldValue
dc.titleElectrochemical properties of bare and Ta-substituted Nb2O 5 nanostructures
dc.contributor.authorLe Viet, A.
dc.contributor.authorReddy, M.V.
dc.contributor.authorJose, R.
dc.contributor.authorChowdari, B.V.R.
dc.contributor.authorRamakrishna, S.
dc.date.accessioned2014-10-07T09:03:59Z
dc.date.available2014-10-07T09:03:59Z
dc.date.issued2011-01-01
dc.identifier.citationLe Viet, A., Reddy, M.V., Jose, R., Chowdari, B.V.R., Ramakrishna, S. (2011-01-01). Electrochemical properties of bare and Ta-substituted Nb2O 5 nanostructures. Electrochimica Acta 56 (3) : 1518-1528. ScholarBank@NUS Repository. https://doi.org/10.1016/j.electacta.2010.10.047
dc.identifier.issn00134686
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/85100
dc.description.abstractIn this work, bare and Ta-substituted Nb2O5 nanofibers are prepared by electrospinning followed by sintering at temperatures in the 800-1100 °C range for 1 h in air. Obtained bare and Ta-substituted Nb2O5 polymorphs are characterized by X-ray diffraction, scanning electron microscopy, density measurement, and Brunauer, Emmett and Teller surface area. Electrochemical properties are evaluated by cyclic voltammetry and galvanostatic techniques. Cycling performance of Nb 2O5 structures prepared at temperature 800 °C, 900 °C, and 1100 °C shows following discharge capacity at the end of 10th cycle: 123, 140, and 164 (±3) mAh g-1, respectively, in the voltage range 1.2-3.0 V and at current rate of 150 mA g-1 (1.5 C rate). Heat treated composite electrode based on M-Nb2O5 (1100 °C) in argon atmosphere at 220 °C, shows an improved discharge capacity of 192 (±3) mAh g-1 at the end of 10th cycle. The discharge capacity of Ta-substituted Nb2O5 prepared at 900 °C and 1100 °C showed a reversible capacity of 150, 202 (±3) mAh g-1, respectively, in the voltage range 1.2-3.0 V and at current rate of 150 mA g-1. Anodic electrochemical properties of M-Nb 2O5 deliver a reversible capacity of 382 (±5) mAh g-1 at the end of 25th cycle and Ta-substituted Nb2O 5 prepared at 900 °C, 1000 °C and 1100 °C shows a reversible capacity of 205, 130 and 200 (±3) mAh g-1 (at 25th cycle) in the range, 0.005-2.6 V, at current rate of 100 mA g-1. © 2010 Elsevier Ltd. All rights reserved.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1016/j.electacta.2010.10.047
dc.sourceScopus
dc.subjectAnodes
dc.subjectCathodes
dc.subjectElectrochemical properties
dc.subjectElectrospinning
dc.subjectLithium batteries
dc.subjectTa-substituted Nb2O5
dc.typeArticle
dc.contributor.departmentNUS NANOSCIENCE & NANOTECH INITIATIVE
dc.contributor.departmentPHYSICS
dc.contributor.departmentMECHANICAL ENGINEERING
dc.description.doi10.1016/j.electacta.2010.10.047
dc.description.sourcetitleElectrochimica Acta
dc.description.volume56
dc.description.issue3
dc.description.page1518-1528
dc.description.codenELCAA
dc.identifier.isiut000289225400071
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