Journal
JOURNAL OF POWER SOURCES
Volume 97-8, Issue -, Pages 282-286Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/S0378-7753(01)00514-6
Keywords
electrostatic spray deposition; LiCoO2; thin-film; XANES; microbatteries
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LiCoO2 thin-film cathode was deposited on Pt-coated alumina substrate by the electrostatic spray deposition method. The average film weight of LiCoO2 increased linearly with the deposition time. Electrochemical characterization was carried out by cyclic voltammetry and charge/discharge tests. These tests revealed that single phase HT-LiCoO2 films could be obtained by the ESD method at temperature as low as 600 degreesC and the LiCoO2 film deposited by the ESD method showed very stable cycling characteristics. The crystallinity of the LiCoO2 layers increased with increasing annealing temperature. XANES results showed that the LiCoO2 film deposited by the ESD method does not show any changes of the local geometry and electronic structure around Co atoms after electrochemical cycling. (C) 2001 Elsevier Science B.V, All rights reserved.
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