Noncooperative Jahn-Teller Effect in Linio2 - An Exafs Study

Rougier, A. and Delmas, C. and Chadwick, A.V. (1995) Noncooperative Jahn-Teller Effect in Linio2 - An Exafs Study. Solid State Communications, 94 (2). pp. 123-127. ISSN 0038-1098. (The full text of this publication is not available from this repository)

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Official URL
http://dx.doi.org/10.1016/0038-1098(95)00020-8

Abstract

Lithium nickel oside, used as positive electrode in rechargeable lithium batteries, exhibits a layered structure made of NiO2 slabs between which Li+ ions are inserted in an octahedral environment. In fact, stoichiometric LiNiO2 has never been reported, the true formula is Li1-zNi1+zO2 (0.0 < z less than or equal to 0.20): z depending on the experimental conditions. Special attention devoted to the synthesis conditions, has allow ed us to obtain quasi-2D LiNiO2. EXAFS spectroscopy shows clearly the existence of the different Ni-O bond lengths : at 1.91 Angstrom (for four of them) and 2.09 Angstrom for the two last ones. This local distortion of the NiO6 octahedra results from the Jahn-Teller effect of the trivalent nickel ion in the low spin state t(2)(6)e(1).

Item Type: Article
Subjects: Q Science
Divisions: Faculties > Science Technology and Medical Studies > School of Physical Sciences
Depositing User: I.T. Ekpo
Date Deposited: 05 Jun 2009 19:11
Last Modified: 05 Jun 2009 19:11
Resource URI: http://kar.kent.ac.uk/id/eprint/19002 (The current URI for this page, for reference purposes)
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