High-pressure synthesis of solid solutions between trigonal LiNiO2 and monoclinic Li[Li1/3Ni2/3]O-2.

Shinova, E. and Zhecheva, E. and Stoyanova, R. and Bromiley, G. D. (2005) High-pressure synthesis of solid solutions between trigonal LiNiO2 and monoclinic Li[Li1/3Ni2/3]O-2. Journal of Solid State Chemistry, 178 (5). pp. 1661-1669. DOI 10.1016/j.jssc.2005.03.007

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Abstract

High-pressure synthesis in an oxygen-rich atmosphere yields solid solutions between LiNiO2 and Li2NiO3 over the whole concentration range. Structural characterization of the high-pressure oxides was performed using powder XRD, SEM analysis, IR spectroscopy, EPR spectroscopy at 9.23 and 115GHz and magnetic susceptibility measurements. The crystal structure of Li[LixNi1x]O2 ,0pxp1 3; changes from trigonal R-3m to monoclinic C2/m at Li-to-Ni ratio of 2 (or x ¼ 1 3). The incorporation of Li into NiO2-layers causes a decrease in the mean Li-O and Ni1–xLix–O bond distance. Li and Ni ions in the mixed Ni1–xLixO2-layers display a tendency to order at a short length scale in such a way that mimics the Li1/3Ni2/3-arrangment of the end Li[Li1/3Ni2/3]O2 composition. The charge distribution in these oxides proceeds via Ni3+ and Ni4+ ions.

Item Type: Article
Uncontrolled Keywords: 2005 AREP 2005 P IA49
Subjects: 03 - Mineral Sciences
Divisions: 03 - Mineral Sciences
Journal or Publication Title: Journal of Solid State Chemistry
Volume: 178
Page Range: pp. 1661-1669
Identification Number: 10.1016/j.jssc.2005.03.007
Depositing User: Sarah Humbert
Date Deposited: 17 Aug 2010 13:26
Last Modified: 23 Jul 2013 09:59
URI: http://eprints.esc.cam.ac.uk/id/eprint/1823

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