Electronic Structure of Chemically-Delithiated LiCoO_2 Studied by Electron Energy-Loss Spectrometry
Abstract
The electronic structure of chemically delithiated Li_(1-x)CoO_2 (x = −0.02, 0.09, 0.12, 0.20, and 0.28) was investigated by electron energy-loss spectrometry (EELS). The O K edge and Co L_(2,3) edge were used to probe the density of unoccupied states around the O and Co ions at different states of lithiation. The O ions accommodate the incoming charge during Li intercalation. The net electron density surrounding the Co ions is 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. Calculations of the O 2p partial densities of state curves confirm the increase in unoccupied states that accompany Li extraction.
Additional Information
© 2002 American Chemical Society. Received 28 August 2001. Published online 12 January 2002. Published in print 1 February 2002. We thank Anton Van der Ven and Gerbrand Ceder for providing the atomic positions used in the VASP code. We are grateful to Enax Inc. (Japan) for providing the LiCoO_2 used in this study and thank Reminex Inc. (Morocco) for the elemental analyses. This work was supported by the Department of Energy through Basic Energy Sciences Grant No. DE-FG03-00ER15035.Additional details
- Eprint ID
- 78291
- Resolver ID
- CaltechAUTHORS:20170616-134646937
- DE-FG03-00ER15035
- Department of Energy (DOE)
- Created
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2017-06-16Created from EPrint's datestamp field
- Updated
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2021-11-15Created from EPrint's last_modified field