Kalpana, D. and Justinjoseyphus, R. and Sivakumar, N. and Narayanasamy, A. and Ananth, M.V. (2006) Structural, magnetic and electrochemical studies on LiCo0.5Fe0.5O2. Ionics, 12 (6). pp. 371-378. ISSN 0947-7047

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Abstract

LiCo0.5Fe0.5O2 was prepared by sol–gel method. The sample had spinel, cubic and hexagonal phases up to 873 K and a single hexagonal phase above 1,073 K. The magnetic properties were studied at room temperature and at 77 K. The large coercivities observed for the samples annealed at 1,073 and 1,273 K show that these samples do not exhibit a simple antiferromagnetic ordering. From the Mössbauer and magnetization measurements, it is concluded that the hexagonal phase is only an antiferromagnet. The above results clearly demonstrate that the simple aqueousbased sol–gel process developed in this work provides a viable method to synthesize the fine cuboidal particles that display discharge capacity as high as ≈165 mAh/g, which is higher than the value obtained by M. Holzapfel et al. (Holzapfel M, Schreiner R, Ott A, Electrochim Acta 46:1063, 2001) for their samples synthesized by using the ion exchange method. This work suggests that the approaches based on solution chemistry are viable processes for synthesizing good quality electrode material.

Item Type:	Article
Uncontrolled Keywords:	Lithium-ion batteries; Lithium cobalt oxide; LiCo0.5Fe0.5O2; Mössbauer effect; Triangular antiferromagnetism
Subjects:	Lithium batteries Electrochemical Power Sources
Divisions:	UNSPECIFIED
Depositing User:	ttbdu cecri
Date Deposited:	06 Apr 2012 15:12
Last Modified:	06 Apr 2012 15:12
URI:	http://cecri.csircentral.net/id/eprint/638

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