Sivashanmugam, A. and Gopukumar, S. and Thirunakaran, R. and Nithya, C. and Prema, S. (2011) Novel Li4Ti5O12/Sn nano-composites as anode material for lithium ion batteries. Materials Research Bulletin, 46 (04). pp. 492-500. ISSN 0025-5408

PDF - Published Version Restricted to Registered users only Download (1367Kb) | Request a copy

Abstract

Li4Ti5O12/Sn nano-composites have been prepared as anode material for lithium ion batteries by highenergy mechanical millingmethod. Structure of the samples has been characterized by X-ray diffraction (XRD), which reveals the formation of phase-pure materials. Scanning electron microscope (SEM) and transmission electron microscope (TEM) suggests that the primary particles are around 100 nm size. The local environment of the metal cations is confirmed by Fourier transform infrared (FT-IR) and the X-ray photoelectron spectroscopy (XPS) confirms that titanium is present in Ti4+ state. The electrochemical properties have been evaluated by galvanostatic charge/discharge studies. Li4Ti5O12/Sn–10% composite delivers stable and enhanced discharge capacity of 200 mAh g�1 indicates that the electrochemical performance of Li4Ti5O12/Sn nano-composites is associated with the size and distribution of the Sn particles in the Li4Ti5O12 matrix. The smaller the size and more homogeneous dispersion of Sn particles in the Li4Ti5O12 matrix exhibits better cycling performance of Li4Ti5O12/Sn composites as compared to bare Li4Ti5O12 and Sn particles. Further, Li4Ti5O12 provides a facile microstructure to fairly accommodate the volume expansion during the alloying and dealloying of Sn with lithium

Item Type:	Article
Uncontrolled Keywords:	Composites; X-ray diffraction (XRD)
Subjects:	Lithium batteries Electrochemical Power Sources
Divisions:	UNSPECIFIED
Depositing User:	ttbdu cecri
Date Deposited:	19 Nov 2012 08:32
Last Modified:	19 Nov 2012 08:32
URI:	http://cecri.csircentral.net/id/eprint/2917

Actions (login required)

View Item