|
|||||
|
|
Structure and electrical properties of sputtered lithium cobaltite thin films |
|
| Authors: | K.J Rao H Benqlilou-MouddenG Couturier P VinatierA Levasseur |
| Affiliation: | a Institut de Chimie de la Matière Condensée de Bordeaux, CNRS and Ecole Nationale Supérieure de Chimie et de Physique de Bordeaux, 16 Avenue Pey Berland, 33607 Pessac Cedex, France b Centre de Physique Moléculaire Optique et Hertzienne, URA CNRS 283, 351, Cours de la Libération, 33402 Talence Cedex, France c Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560 012, India |
| Abstract: | 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. |
| Keywords: | C. X-ray diffraction D. Electrical properties D. Microstructure |
| 本文献已被 ScienceDirect 等数据库收录！ | |