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Carbonate anion controlled growth of LiCoPO4/C nanorods and its improved electrochemical behavior

Gangulibabu, , Nallathamby, K., Meyrick, D. and Minakshi, M.ORCID: 0000-0001-6558-8317 (2013) Carbonate anion controlled growth of LiCoPO4/C nanorods and its improved electrochemical behavior. Electrochimica Acta, 101 . pp. 18-26.

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Link to Published Version: http://dx.doi.org/10.1016/j.electacta.2012.09.115
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Abstract

LiCoPO 4/C nanocomposite with growth controlled by carbonate anions was synthesized via a unique solid-state fusion method. Carbonate anions in the form of H 2CO 3 or a mixture of H 2CO 3 + (NH 4) 2CO 3 have been used as a growth inhibiting modifier to produce morphology controlled lithium cobalt phosphate. The presence of cobalt phosphide (Co 2P) as a second phase improved the conductivity and electrochemical properties of the parent LiCoPO 4. The formation of Co 2P is found to be achievable only in an inert atmosphere. Super P ® carbon (10 wt.%) provided an adherent carbon coating on pristine LiCoPO 4 resulting in the LiCoPO 4/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 Co 2P under inert atmosphere has influenced the electrochemical behavior of LiCoPO 4/C cathode through controlling the morphology and increasing the conductivity.

Item Type: Journal Article
Murdoch Affiliation: School of Chemical and Mathematical Science
School of Veterinary and Life Sciences
Publisher: Elsevier
Copyright: © 2012 Elsevier Ltd.
URI: http://researchrepository.murdoch.edu.au/id/eprint/12262
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