Babu, G. and Kalaiselvi, N. and Bhuvaneswari, D. and Doh, C.H. (2010) On the Synergistic Effect of Carbonate Anion Directed Shape Controlled Morphology and Super P Carbon in Preparing LiFePO4/C Cathode With Improved Lithium Intercalation Behavior. International Journal of ELECTROCHEMICAL SCIENCE, 5. 1597 -1604. ISSN 1452-3981

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Abstract

A simple and carbonic acid directed modified mechano thermal (MMT) method is identified to produce morphology controlled nano rods of LiFePO4/C composite. The added carbonic acid plays a vital role in controlling the morphology (CO3 2- inhibition effect) and the formation of rod-like structure that results from the unidirectional escape of CO2 gas upon calcination. MMT synthesized LiFePO4/C cathode containing 2 wt.% conducting graphite exhibits a nominal specific capacity of 129 mAhg-1, while the corresponding LiFePO4/C with 2 wt.% nickel coated graphite delivers 100 mAhg-1 capacity. On the other hand, MMT synthesized LiFePO4/C composite cathode consisting of 2 wt.% super P carbon exhibits an appreciable capacity of 160 mAhg-1 with an acceptable rate capability behaviour. The synergistic effect of shape controlled morphology (resulting from MMT synthesis approach) and the addition of super P carbon in improving the electrochemical behavior of LiFePO4/C composite cathode is demonstrated in the present study.

Item Type:	Article
Uncontrolled Keywords:	Modified mechano thermal (MMT) method; conventional mechano thermal (CMT)method; lithium iron phosphate; lithium batteries
Subjects:	Lithium batteries
Divisions:	UNSPECIFIED
Depositing User:	ttbdar CECRI
Date Deposited:	18 Jan 2012 04:05
Last Modified:	18 Jan 2012 04:05
URI:	http://cecri.csircentral.net/id/eprint/245

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