Jayaprakash, N. and Kalaiselvi, N. and Periasamy, P. (2008) Synthesis and Characterization of LiMXFe1-XPO4 (M = Cu, Sn; X = 0.02) Cathodes - A study on the Effect of Cation Substitution in LiFePO4 Material. International Journal of Electrochemical Science, 3 (4). pp. 476-488. ISSN 1452-3981

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Abstract

An attempt has been made for the possible augmentation and exploration of partially substituted LiFePO4 material as a positive electrode for lithium battery applications. In this regard, cationic substitution of Cu and Sn (2%) to the native LiFePO4/C electro active material has been carried out via. ball milling, with a view to understand the effect of respective transition and non-transition metals upon LiFePO4 individually. Uniformly distributed particles (SEM) of LiMXFe1-XPO4/C (M= Cu, Sn) with phase pure nature (XRD) and finer crystallite size (<1mm) were obtained. Further, it is interesting to note that irrespective of the nature of the dopant metal, the simple route of ball milled LiMXFe1- XPO4/C [M= Cu, Sn] cathodes endowed with improved conductivity and stable reversible capacity values (chare-discharge). In other words, the LiCu0.02Fe0.98PO4/C cathode delivered a reversible capacity of ~105 mAh/g with an excellent capacity retention characteristic. On the other hand LiSn0.02Fe0.98PO4/C cathodes exhibited an average specific capacity of ~100mAh/g with progressively enhanced efficiency values. Results of Fourier Transform Infra Red (FTIR) spectroscopy and Cyclic Voltammetric studies of LiMXFe1-XPO4/C (M= Cu, Sn) composites are also appended and correlated suitably.

Item Type:	Article
Uncontrolled Keywords:	Energy storage materials; Sintering; SEM; LiFePO4 Cationic substitution; Li-ion Battery
Subjects:	Lithium batteries Electrochemical Power Sources
Divisions:	UNSPECIFIED
Depositing User:	ttbdu cecri
Date Deposited:	18 Jan 2012 04:07
Last Modified:	18 Jan 2012 04:07
URI:	http://cecri.csircentral.net/id/eprint/183

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