RAO, Kalya J.; BENQLILOU-MOUDDEN, Hanane; COUTURIER, Gérard; VINATIER, Philippe; LEVASSEUR, Alain

doi:10.1016/S0025-5408(02)00756-0

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RAO, Kalya J.
Solid State and Structural Chemistry Unit, Material Research Center
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

BENQLILOU-MOUDDEN, Hanane
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

COUTURIER, Gérard
Centre de physique moléculaire optique et hertzienne [CPMOH]

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Ce document a été publié dans

Materials Research Bulletin. 2002, vol. 37, n° 7, p. 1353-1367

Elsevier

Résumé en anglais

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.< Réduire

Mots clés en espagnol

X-ray diffraction

Electrical properties

Microstructure

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Structure and electrical properties of sputtered lithium cobaltite thin films

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Résumé en anglais

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