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An Electron Energy-Loss Spectrometry Study of Charge Compensation in LiNi_(0.8)Co_(0.2)O_2

Graetz, J. and Ahn, C. C. and Yazami, R. and Fultz, B. (2003) An Electron Energy-Loss Spectrometry Study of Charge Compensation in LiNi_(0.8)Co_(0.2)O_2. Journal of Physical Chemistry B, 107 (13). pp. 2887-2891. ISSN 1520-6106. doi:10.1021/jp026484y.

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Changes in the electronic structure of Li_(1-x)Ni_(0.8)Co_(0.2)O_2 during delithiation (charge) are elucidated by changes in the O K-edge and transition-metal (TM) L_(2,3)-edge. Electron energy-loss spectrometry was used to investigate the O 2p and TM 3d occupancy over a wide range of lithium concentrations. Quantitative analysis of the TM L_(2,3) white lines indicates that the Ni ion accommodates no more than one-half of an electron, whereas the net Co valence is unaffected by delithiation. In contrast with the small changes observed in the TM L_(2,3)-edge, a large decrease in state occupancy is observed in the near-edge structure of the O K-edge, suggesting that much of the electron charge is accommodated by the anion.

Item Type:Article
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URLURL TypeDescription
Yazami, R.0000-0002-0085-5012
Fultz, B.0000-0002-6364-8782
Additional Information:© 2003 American Chemical Society. Received 9 July 2002. Published online 11 March 2003. Published in print 1 April 2003. We would like to thank Enax Inc. (Japan) for providing the LiNi_(0.8)Co_(0.2)O_2, and we are grateful to Reminex Inc. (Morocco) for the elemental analyses of the oxides. This work was supported by the Department of Energy, through Basic Energy Sciences Grant No. DE-FG03-00ER15035.
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Department of Energy (DOE)DE-FG03-00ER15035
Issue or Number:13
Record Number:CaltechAUTHORS:20170519-142726956
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Official Citation:An Electron Energy-Loss Spectrometry Study of Charge Compensation in LiNi0.8Co0.2O2 J. Graetz, C. C. Ahn, R. Yazami, and B. Fultz The Journal of Physical Chemistry B 2003 107 (13), 2887-2891 DOI: 10.1021/jp026484y
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:77607
Deposited By: Ruth Sustaita
Deposited On:19 May 2017 22:15
Last Modified:15 Nov 2021 17:32

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