Kalpana, D. and Justinjoseyphus, R. and Venkateswaran, C. and Narayanasamy, A. and Ananth, M.V. (2006) Influence of magnetic properties on electrochemical activity of LiNi0.5Fe0.5O2. Journal of Power Sources, 156 (2). pp. 598-603. ISSN 0378-7753

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Abstract

LiNi0.5Fe0.5O2 is prepared by a sol–gel method and the sample is heat-treated to various temperatures to characterize its physico-chemical properties. Calcination of the precursor at 673K produces powders of tetragonal and hexagonal phases. Subsequent heat treatment at 873, 1073 and 1273K results in a pure hexagonal phase. Vibrating sample magnetometer (VSM) studies show that the tetragonal phase is magnetically stronger than the hexogonal phase. Room-temperature M¨ossbauer studies reveal magnetic ordering for the tetragonal phase and the paramagnetic nature of the hexagonal phase. The hexagonal phase is magnetically ordered at 77 K. By comparing the value of the hyperfine field with the bulk magnetization value at 77K obtained from VSM, it is concluded that the magnetic ordering cannot be ferromagnetic but should be antiferromagnetic.

Item Type:	Article
Uncontrolled Keywords:	LiCo0.5Fe0.5O2; M¨ossbauer effect; Triangular antiferromagnetism; Lithium-ion battery; Magnetic properties
Subjects:	Lithium batteries Electrochemical Power Sources
Divisions:	UNSPECIFIED
Depositing User:	ttbdu cecri
Date Deposited:	28 Feb 2012 11:44
Last Modified:	28 Feb 2012 11:44
URI:	http://cecri.csircentral.net/id/eprint/701

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