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High capacity lithium-ion battery cathode using LiV3O8 nanorods

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Title High capacity lithium-ion battery cathode using LiV3O8 nanorods
 
Creator SARKAR, S
BANDA, H
MITRA, S
 
Subject High power density cathode
Lithium-ion batteries
LiV3O8 nanorod
Sol-gel
IMPEDANCE SPECTROSCOPY EIS
SOL-GEL METHOD
LI-ION
ELECTROCHEMICAL IMPEDANCE
INSERTION ELECTRODES
STRUCTURAL-CHARACTERIZATION
SECONDARY BATTERIES
VANADIUM-OXIDES
PERFORMANCE
LI1+XV3O8
 
Description Nanorods of LiV3O8 are synthesized using citrate assisted sol-gel method followed by room temperate quenching technique. The physical parameters are identified by X-ray diffraction (XRD), Raman spectroscopy, field emission scanning electron microscopy (FE-SEM), high resolution transmission electron spectroscopy (HR-TEM). The detailed kinetic studies of these electrodes comprising of different weight percentage of conductive carbon and fixed binder concentration are pursued by cyclic voltammetry (CV), in situ electrochemical impedance spectroscopy (EIS) experiments. The in situ EIS results during lithiumion intercalation and deintercalation processes are discussed on the basis of equivalent electrical circuit model and analyzed by non linear least square fit method. The estimated kinetic parameters are analyzed after obtaining good agreement between fitted EIS spectra and experimental data. The change in the kinetic parameters with varying offset potentials is also discussed within the experimental limit. Due to high apparent lithium-ion diffusion in solid matrix as well as low charge transfer resistance and relatively high exchange current density value, made this nanorod materials attractive for high rate lithium-ion battery applications. Herein, LiV3O8 nanorods exhibit excellent electrochemical properties and demonstrate superior cycling behavior with first discharge capacity of 338 mAh g(-1), 283 mAh g(-1), 237 mAh g(-1) at 101 mAg(-1) for 30%, 20%, and 10% carbon additive, respectively. (C) 2013 Elsevier Ltd. All rights reserved.
 
Publisher PERGAMON-ELSEVIER SCIENCE LTD
 
Date 2014-10-15T10:23:52Z
2014-10-15T10:23:52Z
2013
 
Type Article
 
Identifier ELECTROCHIMICA ACTA, 99242-252
http://dx.doi.org/10.1016/j.electacta.2013.03.083
http://dspace.library.iitb.ac.in/jspui/handle/100/14737
 
Language en