Gangulibabu, . and Kalaiselvi, N. and Daniella, Meyrick and Minakshi, M. (2013) Carbonate anion controlled growth of LiCoPO4/C nanorods and its improved electrochemical behavior. Electrochimica Acta, 101. pp. 18-26. ISSN 0013-4686

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Abstract

LiCoPO4/C nanocomposite with growth controlled by carbonate anions was synthesized via a unique solid-state fusion method. Carbonate anions in the form of H2CO3 or a mixture of H2CO3 + (NH4)2CO3 have been used as a growth inhibiting modifier to produce morphology controlled lithium cobalt phosphate. The presence of cobalt phosphide (Co2P) as a second phase improved the conductivity and electrochemical properties of the parent LiCoPO4. The formation of Co2P is found to be achievable only in an inert atmosphere. Super P® carbon (10 wt.%) provided an adherent carbon coating on pristine LiCoPO4 resulting in the LiCoPO4/C composite cathode. This electrode exhibited enhanced electrochemical properties: capacity of 123 mAh g−1 with excellent capacity retention of 89% after 30 cycles, and reasonable rate capability of up to 5 C rate. The synergistic effect of carbonate anions and formation of Co2P under inert atmosphere has influenced the electrochemical behavior of LiCoPO4/C cathode through controlling the morphology and increasing the conductivity.

Item Type:	Article
Uncontrolled Keywords:	Carbonate anion, Co2P, LiCoPO4/C, Nanorods, Lithium batteries
Subjects:	Lithium batteries Electrochemical Power Sources
Divisions:	UNSPECIFIED
Depositing User:	Dr. N Meyyappan
Date Deposited:	30 Dec 2013 13:40
Last Modified:	30 Dec 2013 13:40
URI:	http://cecri.csircentral.net/id/eprint/3058

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