Studies on the Lithium Ion Diffusion Coefficients of Electrospun Nb2O5 Nanostructures Using Galvanostatic Intermittent Titration and Electrochemical Impedance Spectroscopy

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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Main Authors: Rajan, Jose, Reddy, M. Venkatashamy, Le Viet, Anh, Ozoemenad, Kenneth I, Chowdary, B. V. R, Ramakrishna, S.
Format: Article
Language:English
Published: Elsevier 2014
Subjects:
QD Chemistry
Online Access: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
id ump-6248
recordtype eprints
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 http://dx.doi.org/10.1016/j.electacta.2013.10.003 DOI: 10.1016/j.electacta.2013.10.003
repository_type Digital Repository
institution_category Local University
institution Universiti Malaysia Pahang
building UMP Institutional Repository
collection Online Access
language English
topic QD Chemistry
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
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.
format Article
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
title 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_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_sort studies on the lithium ion diffusion coefficients of electrospun nb2o5 nanostructures using galvanostatic intermittent titration and electrochemical impedance spectroscopy
publisher Elsevier
publishDate 2014
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
first_indexed 2023-09-18T22:01:50Z
last_indexed 2023-09-18T22:01:50Z
_version_ 1777414450308972544

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