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Structure and electrical properties of sputtered lithium cobaltite thin films

Rao, KJ and Benqlilou-Moudden, H and Couturier, G and Vinatier, R and Levasseur, A (2002) Structure and electrical properties of sputtered lithium cobaltite thin films. In: Materials Research Bulletin, 37 (7). pp. 1353-1367.

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Official URL: http://dx.doi.org/10.1016/S0025-5408(02)00756-0


LixCoOy films with x < 1 and y > 2 have been prepared by radio-frequency (rf) sputtering from high temperature (HT) LiCoO2 targets. Their structures have been examined with high resolution electron microscopy. Conductivities have been studied between 77 and 400 K. The electrochemical behaviour of film electrodes have been investigated with Li/LiClO4-PC/LixCoOy cells. The annealed films consist of nanocrystalline domains with amorphous boundaries. Electrical conductivities appear to arise from variable-range hopping (VRH) of holes. The films form good electrodes with operating potentials between 2.7 and 3.8 V. The observations have been discussed on the basis of a tentative and heuristic molecular orbital based energy band diagram. (C) 2002 Published by Elsevier Science Ltd.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science.
Keywords: C.X-ray diffraction;D.Electrical properties;D.Microstructure
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Depositing User: Ms V Mangala
Date Deposited: 28 Jul 2011 06:09
Last Modified: 28 Jul 2011 06:09
URI: http://eprints.iisc.ac.in/id/eprint/39419

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