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Phase Transition, Electrochemistry, and Structural Studies of High Rate LixV3O8 Cathode with Nanoplate Morphology

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Title Phase Transition, Electrochemistry, and Structural Studies of High Rate LixV3O8 Cathode with Nanoplate Morphology
 
Creator SARKAR, S
BHOWMIK, A
BHARADWAJ, MD
MITRA, S
 
Subject LITHIUM-ION BATTERIES
POSITIVE-ELECTRODE MATERIALS
SOL-GEL
IMPEDANCE SPECTROSCOPY
SECONDARY BATTERIES
LIV3O8
PERFORMANCE
LI1+XV3O8
LICOO2
NANORODS
 
Description Structural and kinetic behavior of lithium-vanadium-oxide (LixV3O8) cathode is studied as lithium-ion battery electrode. The morphology of LixV3O8 is found to be nanoplates with nanorods as minor constituents. Theoretical prediction shows such a nanoplate morphology will have almost thirty four times faster lithium diffusion than spherical particle of same volume. In the present study, experimental and theoretical observation of Fourier transform infrared spectroscopy (FT-IR) is compared to investigate the vibrational mode of V-O bond. LixV3O8 cathode, delivers a high discharge capacity of 270 mAh g(-1) at 200 mA g(-1) and as high as 200 mAh g(-1), 135 mAh g(-1), and 100 mAh g(-1) at 1000 mA g(-1), 2000 mA g(-1), and 3000 mA g(-1) current rates respectively. A detailed electrode kinetic study using galvanostatic intermittent titration technique (GITT) and electrochemical impedance spectroscopy (EIS) are performed to establish the relationship between high rate capability with kinetic parameters. The diffusion co-efficient D-Lithium) value of LixV3O8 is estimated to be similar to 10(-15)-10(-13) cm(2) s(-1) and 10(-13) - 10(-11) cm(2) s(-1) in the single phase region (0
 
Publisher ELECTROCHEMICAL SOC INC
 
Date 2014-12-29T04:38:26Z
2014-12-29T04:38:26Z
2014
 
Type Article
 
Identifier JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 161(1)A14-A22
0013-4651
1945-7111
http://dx.doi.org/10.1149/2.006401jes
http://dspace.library.iitb.ac.in/jspui/handle/100/17096
 
Language English