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Lattice Dynamics and Vibrational Spectra of Lithium Manganese Oxides: A Computer Simulation and Spectroscopic Study
Abstract
The lattice vibrational modes of spinel-structured lithium manganese oxides have been calculated using atomistic modeling methods. The simulations allow the Raman and infrared spectra of lithiated, fully delithiated, and partially delithiated phases to be assigned for the first time. Calculations for the spinels LiMn 2 O 4, λ-MnO 2, and Li 0.5 Mn 2 O 4 are compared with experimental Raman data measured for thin films of the oxides coated on a platinum electrode. The appearance of a number of new bands in the Raman spectrum of LiMn 2 O 4 following partial extraction of lithium is shown to result from local lowering of the symmetry and Raman activation of modes which are optically inactive or only infrared active in LiMn 2 O 4 . The results support a model for the Li 0.5 Mn 2 O 4 lattice in which the lithium ions are ordered. The deformation vibrations of lattice hydroxyl “defects” in λ-MnO 2 have also been calculated; comparison of the calculated and experimental vibrational data supports a model in which hydroxyl species are localized at octahedral Mn vacancies.
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Citations
Cited by
The General Utility Lattice Program ( GULP )
Gale, J. D., & Rohl, A. L. (2003) · Molecular Simulation · doi:10.1080/0892702031000104887 · Cited by 2,265
Fisher, C. A. J., Hart Prieto, V. M., & Islam, M. S. (2008) · Chemistry of Materials · doi:10.1021/cm801262x · Cited by 549
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Chernyshova, I. V., Hochella Jr, M. F., & Madden, A. S. (2007) · Physical Chemistry Chemical Physics · doi:10.1039/b618790k · Cited by 463
Highly selective lithium recovery from brine using a λ-MnO2–Ag battery
Lee, J., Yu, S.-H., Kim, C., Sung, Y.-E., & Yoon, J. (2013) · Physical Chemistry Chemical Physics · doi:10.1039/c3cp50919b · Cited by 220
Metadata
- Authors
- Ammundsen, B., Burns, G. R., Islam, M. S., Kanoh, H., & Rozière, J.
- Venue
- The Journal of Physical Chemistry B
- Publisher
- American Chemical Society (ACS)
- Published
- 1999-06-01
- Volume
- 103
- Issue
- 25
- Pages
- 5175-5180
- ISSN
- 1520-5207 (ISSN-L)
- 1520-6106
- OpenAlex
- W1998366382
- Cited by
- 260
- References
- 0
- FWCI
- 12.90
- Type
- journal article
- Language
- en
- Open access
- closed
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- Ammundsen, B., Burns, G. R., Islam, M. S., Kanoh, H., & Rozière, J. (1999). Lattice Dynamics and Vibrational Spectra of Lithium Manganese Oxides: A Computer Simulation and Spectroscopic Study. The Journal of Physical Chemistry B. https://doi.org/10.1021/jp984398l
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