Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/100183
Title: LiFePO4 modified Li1.02(Co0.9Fe0.1)0.98PO4 cathodes with improved lithium storage properties
Authors: Aravindan, Vanchiappan
Jang, I. C.
Son, C. G.
Yang, S. M. G.
Lee, J. W.
Cho, A. R.
Park, G. J.
Kang, K. S.
Kim, W. S.
Cho, W. I.
Lee, Y. S.
Keywords: DRNTU::Science::Chemistry
Issue Date: 2011
Source: Jang, I. C., Son, C. G., Yang, S. M. G., Lee, J. W., Cho, A. R., Aravindan, V., et al. (2011). LiFePO4 modified Li1.02(Co0.9Fe0.1)0.98PO4 cathodes with improved lithium storage properties. Journal of materials chemistry, 21(18), 6510-6514.
Series/Report no.: Journal of materials chemistry
Abstract: LiCoPO4 and Li1.02(Co0.9Fe0.1)0.98PO4 were prepared by conventional solid state reactions. The surface modification of Li1.02(Co0.9Fe0.1)0.98PO4 particulates by LiFePO4 was successfully carried out by a dry coating procedure. TEM analysis confirmed the presence of a LiFePO4 coating layer of about 20 nm on the surface of the Li1.02(Co0.9Fe0.1)0.98PO4 particles. All three cells delivered high initial discharge capacities of 122, 130 and 128 mA h g−1 for LiCoPO4, Li1.02(Co0.9Fe0.1)0.98PO4, and LiFePO4 modified Li1.02(Co0.9Fe0.1)0.98PO4, respectively. However, these cells presented quite different cycle retention rates after 20 cycles, 21, 22 and 70% for LiCoPO4, Li1.02(Co0.9Fe0.1)0.98PO4, and LiFePO4 modified Li1.02(Co0.9Fe0.1)0.98PO4, respectively. The improved cycle retention of the LiFePO4-modified Li1.02(Co0.9Fe0.1)0.98PO4 resulted from its reduced reactivity towards the electrolyte and the effective prevention of resistive layer formation on the LiCoPO4 surface during high voltage cycling.
URI: https://hdl.handle.net/10356/100183
http://hdl.handle.net/10220/24100
DOI: http://dx.doi.org/10.1039/c1jm10574d
Rights: © 2011 The Royal Society of Chemistry.
metadata.item.grantfulltext: none
metadata.item.fulltext: No Fulltext
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