Kundu, M and Mahanty, Sourindra and Basu, Rajendra Nath (2011) Li(4)Ti(5)O(12)/Li(3)SbO(4)/C composite anode for high rate lithium-ion batteries. Materials Letters, 65 (19-20). pp. 3083-3085. ISSN 0167-577X

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Abstract

Nanocrystalline Li(4)Ti(5)O(12)/Li(3)SbO(4)/C composite-prepared by mechanical ball-milling of Li(4)Ti(5)O(12) (synthesized by aqueous combustion), Li(3)SbO(4) (synthesized by solid state method) and activated carbon, has been investigated as anode in lithium-ion coin cells and compared to pristine Li(4)Ti(5)O(12). Galvanostatic charge-discharge measurements in the potential window of 0.05-2.0 V show three plateau regions corresponding to Li insertion/extraction in the composite: a large flat plateau at similar to 1.52/1.59 V. followed by a second plateau at similar to 0.75/1.1 V and a sloppy tail at similar to 0.4/0.6 V. While the plateaus at similar to 0.4/0.6 V and similar to 1.52/1.59 V correspond to Li(4)Ti(5)O(12), the other one at similar to 0.75/1.1 V corresponds to Li(3)SbO(4). At a high rate of similar to 15 C, the capacity for Li(4)Ti(5)O(12)/Li(3)SbO(4)/C composite is found to be 105 rnAhg(-1) retaining similar to 78% of its initial capacity compared to only 58 mAhg(-1) (similar to 27% of the initial capacity) at 14 C for pristine Li(4)Ti(5)O(12) up to 100 cycles. Thus, such composite material might find application in lithium-ion batteries requiring high rate of charge and discharge. (C) 2011 Elsevier B.V. All rights reserved.

Item Type:	Article
Uncontrolled Keywords:	Lithium titanate; Lithium antimony oxide; Composite materials; Lithium-ion battery; Energy storage and conversion
Subjects:	Electronics
Divisions:	Fuel Cell and Battery
Depositing User:	Bidhan Chaudhuri
Date Deposited:	16 Jan 2012 12:13
Last Modified:	21 Nov 2012 06:53
URI:	http://cgcri.csircentral.net/id/eprint/275

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