Kalaiselvi, N. and Doh, C.H. and Srikeerthi, P. (2007) Synthesis and Characterization of Newly Identified Si3-xMxN4 (M= Co, Fe) Anodes for Lithium Batteries. Journal of New Materials for Electrochemical Systems, 10. pp. 209-212. ISSN 1480-2422

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Abstract

A novel category Si3N4 anode and a series of doped derivatives of silicon nitride with a general formula Si3-xMxN4 [M= Co and Fe] were identified as possible anode materials for rechargeable lithium batteries through the present study. The compounds were synthesized via solid-state fusion method and characterized for phase purity and surface morphology through XRD and SEM respectively, prior to electrochemical performance analysis. The compound Si3N4 exhibited inferior capacity (~100mAh/g) whereas the metal doped nitrides, viz., Si3-xMxN4 [M= Co and Fe] exhibited improved specific capacity values in the range of 130-470 mAh/g, with lesser capacity fade (<20%) after 50 cycles. More specifically, the Si3-xFexN4 anode with a specific capacity of ~ 470mAh/g may be exploited for practical applications. The effects of individual dopants in enhancing the electrochemical behavior of Si3-xMxN4 anodes are discussed.

Item Type:	Article
Uncontrolled Keywords:	semiconductors; chemical synthesis; scanning electron microscopy; specific capacity
Subjects:	Lithium batteries
Divisions:	UNSPECIFIED
Depositing User:	ttbdar CECRI
Date Deposited:	01 Mar 2012 07:02
Last Modified:	01 Mar 2012 07:02
URI:	http://cecri.csircentral.net/id/eprint/778

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