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Instruments / Technical Area	Publication Details	Published	Actions
I09-Surface and Interface Structural Analysis I21-Resonant Inelastic X-ray Scattering (RIXS)	Oxygen-redox activity in non-lithium-excess tungsten-doped LiNiO2 cathode A. S. Menon , B. J. Johnston , S. G. Booth , L. Zhang , K. Kress , B. E. Murdock , G. Paez Fajardo , N. N. Anthonisamy , N. Tapia-Ruiz , S. Agrestini , M. Garcia-Fernandez , K. Zhou , P. K. Thakur , T. L. Lee , A. J. Nedoma , S. A. Cussen , L. F. J. Piper Prx Energy 2 DOI: 10.1103/PRXEnergy.2.013005 Diamond Proposal Number(s): [29104, 29113] Open Access Show Abstract ▼ Abstract: The desire to increase the energy density of stoichiometric layered Li TM O 2 (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 Li Ni 0.98 W 0.02 O 2 , 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.	Mar 2023

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I09-Surface and Interface Structural Analysis
I21-Resonant Inelastic X-ray Scattering (RIXS)

Oxygen-redox activity in non-lithium-excess tungsten-doped LiNiO2 cathode