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Oxygen-redox activity in non-lithium-excess tungsten-doped LiNiO2c cathode
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Menon, Ashok S., Johnston, B. J., Booth, S. G., Zhang, L., Kress, K., Murdock, B. E., Paez Fajardo, G., Anthonisamy, N. N., Tapia-Ruiz, N., Agrestini, S., Garcia-Fernandez, M., Zhou, K., Thakur, P. K., Lee, T. L., Nedoma, A. J., Cussen, S. A. and Piper, Louis F. J. (2023) Oxygen-redox activity in non-lithium-excess tungsten-doped LiNiO2c cathode. PRX Energy, 2 (1). 013005. doi:10.1103/PRXEnergy.2.013005 ISSN 2768-5608.
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Official URL: https://doi.org/10.1103/PRXEnergy.2.013005
Abstract
The desire to increase the energy density of stoichiometric layered
LiTMO2 (TM = 3d transition metal) cathode materials has promoted investigation into their properties at high states of charge. Although there is increasing evidence for pronounced oxygen participation in the charge compensation mechanism, questions remain whether this is true O-redox, as observed in Li-excess cathodes. Through a high-resolution O K-edge resonant inelastic x-ray spectroscopy (RIXS) study of the Mn-free Ni-rich layered oxide LiNi0.98W0.02O2, we demonstrate that the same oxidized oxygen environment exists in both
Li-excess and non-Li-excess systems. The observation of identical RIXS loss features in both classes of compounds is remarkable given the differences in their crystallographic structure and delithiation pathways. This lack of a specific structural motif reveals the importance of electron correlation in the charge compensation mechanism for these systems and indicates how a better description of charge compensation in layered oxides is required to understand anionic redox for energy storage.
| Item Type: | Journal Article | |||||||||
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| Subjects: | Q Science > QD Chemistry | |||||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | |||||||||
| Library of Congress Subject Headings (LCSH): | Electrodes, Oxygen, Oxidation-reduction reaction, Cathodes, Electrodes, Tungsten | |||||||||
| Journal or Publication Title: | PRX Energy | |||||||||
| Publisher: | American Physical Society | |||||||||
| ISSN: | 2768-5608 | |||||||||
| Official Date: | 13 March 2023 | |||||||||
| Dates: |
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| Volume: | 2 | |||||||||
| Number: | 1 | |||||||||
| Article Number: | 013005 | |||||||||
| DOI: | 10.1103/PRXEnergy.2.013005 | |||||||||
| Status: | Peer Reviewed | |||||||||
| Publication Status: | Published | |||||||||
| Access rights to Published version: | Open Access (Creative Commons) | |||||||||
| Date of first compliant deposit: | 14 March 2023 | |||||||||
| Date of first compliant Open Access: | 15 March 2023 | |||||||||
| Grant number: | FutureCat (FIRG017) and Degradation (FIRG024) | |||||||||
| RIOXX Funder/Project Grant: |
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