| Abstract
| - The electronic structure of chemically delithiated Li1-xCoO2 (x = −0.02, 0.09, 0.12, 0.20, and 0.28) wasinvestigated by electron energy-loss spectrometry (EELS). The O K edge and Co L2,3 edge were used toprobe the density of unoccupied states around the O and Co ions at different states of lithiation. The O ionsaccommodate the incoming charge during Li intercalation. The net electron density surrounding the Co ionsis less affected. This is in substantial agreement with prior electronic structure calculations of Van der Ven,et al., whose atomic structure data were used in the present calculations of EELS cross-sections. Calculationsof the O 2p partial densities of state curves confirm the increase in unoccupied states that accompany Liextraction.
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