Structural and Electrochemical Characterization of Pure and Nanocomposite C- Cathodes for Lithium Ion Rechargeable Batteries
Abstract
Pure lithium iron phosphate ( ) and carbon-coated (C- ) cathode materials were synthesized for Li-ion batteries. Structural and electrochemical properties of these materials were compared. X-ray diffraction revealed orthorhombic olivine structure. Micro-Raman scattering analysis indicates amorphous carbon, and TEM micrographs show carbon coating on particles. Ex situ Raman spectrum of C- at various stages of charging and discharging showed reversibility upon electrochemical cycling. The cyclic voltammograms of and C- showed only a pair of peaks corresponding to the anodic and cathodic reactions. The first discharge capacities were 63, 43, and 13 mAh/g for C/5, C/3, and C/2, respectively for where as in case of C- that were 163, 144, 118, and 70 mAh/g for C/5, C/3, C/2, and 1C, respectively. The capacity retention of pure was 69% after 25 cycles where as that of C- was around 97% after 50 cycles. These results indicate that the capacity and the rate capability improved significantly upon carbon coating.
- Authors:
-
- Department of Physics and Institute for Functional Nanomaterials, University of Puerto Rico, San Juan, PR 00931-3343, USA
- Centre of Material Sciences, University of Allahabad, Allahabad 211002, India
- Materials Science Center, Indian Institute of Technology, Kharagpur 721302, India
- Department of Physics, University of Puerto Rico, Mayaguez, PR 00680-9016, USA
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1197868
- Grant/Contract Number:
- NNX08AB12A
- Resource Type:
- Published Article
- Journal Name:
- Journal of Nanotechnology
- Additional Journal Information:
- Journal Name: Journal of Nanotechnology Journal Volume: 2009; Journal ID: ISSN 1687-9503
- Publisher:
- Hindawi Publishing Corporation
- Country of Publication:
- United Kingdom
- Language:
- English
Citation Formats
Kumar, Arun, Thomas, R., Karan, N. K., Saavedra-Arias, J. J., Singh, M. K., Majumder, S. B., Tomar, M. S., and Katiyar, R. S. Structural and Electrochemical Characterization of Pure LiFePO 4 and Nanocomposite C- LiFePO 4 Cathodes for Lithium Ion Rechargeable Batteries. United Kingdom: N. p., 2009.
Web. doi:10.1155/2009/176517.
Kumar, Arun, Thomas, R., Karan, N. K., Saavedra-Arias, J. J., Singh, M. K., Majumder, S. B., Tomar, M. S., & Katiyar, R. S. Structural and Electrochemical Characterization of Pure LiFePO 4 and Nanocomposite C- LiFePO 4 Cathodes for Lithium Ion Rechargeable Batteries. United Kingdom. https://doi.org/10.1155/2009/176517
Kumar, Arun, Thomas, R., Karan, N. K., Saavedra-Arias, J. J., Singh, M. K., Majumder, S. B., Tomar, M. S., and Katiyar, R. S. Thu .
"Structural and Electrochemical Characterization of Pure LiFePO 4 and Nanocomposite C- LiFePO 4 Cathodes for Lithium Ion Rechargeable Batteries". United Kingdom. https://doi.org/10.1155/2009/176517.
@article{osti_1197868,
title = {Structural and Electrochemical Characterization of Pure LiFePO 4 and Nanocomposite C- LiFePO 4 Cathodes for Lithium Ion Rechargeable Batteries},
author = {Kumar, Arun and Thomas, R. and Karan, N. K. and Saavedra-Arias, J. J. and Singh, M. K. and Majumder, S. B. and Tomar, M. S. and Katiyar, R. S.},
abstractNote = {Pure lithium iron phosphate ( LiFePO 4 ) and carbon-coated LiFePO 4 (C- LiFePO 4 ) cathode materials were synthesized for Li-ion batteries. Structural and electrochemical properties of these materials were compared. X-ray diffraction revealed orthorhombic olivine structure. Micro-Raman scattering analysis indicates amorphous carbon, and TEM micrographs show carbon coating on LiFePO 4 particles. Ex situ Raman spectrum of C- LiFePO 4 at various stages of charging and discharging showed reversibility upon electrochemical cycling. The cyclic voltammograms of LiFePO 4 and C- LiFePO 4 showed only a pair of peaks corresponding to the anodic and cathodic reactions. The first discharge capacities were 63, 43, and 13 mAh/g for C/5, C/3, and C/2, respectively for LiFePO 4 where as in case of C- LiFePO 4 that were 163, 144, 118, and 70 mAh/g for C/5, C/3, C/2, and 1C, respectively. The capacity retention of pure LiFePO 4 was 69% after 25 cycles where as that of C- LiFePO 4 was around 97% after 50 cycles. These results indicate that the capacity and the rate capability improved significantly upon carbon coating.},
doi = {10.1155/2009/176517},
journal = {Journal of Nanotechnology},
number = ,
volume = 2009,
place = {United Kingdom},
year = {Thu Jan 01 00:00:00 EST 2009},
month = {Thu Jan 01 00:00:00 EST 2009}
}
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