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A Fundamental Corre...
A Fundamental Correlative Spectroscopic Study on Li 1-x NiO 2 and NaNiO 2
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- Jacquet, Quentin (författare)
- Université Grenoble Alpes,Grenoble Alpes University
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- Mozhzhukhina, Nataliia, 1989 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Gillespie, Peter N.O. (författare)
- Consiglo Nazionale Delle Richerche
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- Wittmann, Gilles (författare)
- SOLEIL Synchrotron
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- Ramirez, Lucia Perez (författare)
- SOLEIL Synchrotron
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- Capone, Federico G. (författare)
- Centre national de la recherche scientifique (CNRS)
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- Rueff, Jean Pascal (författare)
- SOLEIL Synchrotron
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- Belin, Stephanie (författare)
- SOLEIL Synchrotron
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- Dedryvere, R. (författare)
- Centre national de la recherche scientifique (CNRS),Universite de Pau et des Pays de L'Adour
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- Stievano, L. (författare)
- Institut Charles Gerhardt Montpellier,Centre national de la recherche scientifique (CNRS)
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- Matic, Aleksandar, 1968 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Suard, E. (författare)
- Institut Laue-Langevin
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- Brookes, Nicholas B. (författare)
- European Synchrotron Radiation Facility (ESRF)
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- Longo, Alessandro (författare)
- Istituto per lo Studio dei Materiali Nanostrutturati del C.N.R.,European Synchrotron Radiation Facility (ESRF)
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- Prezzi, Deborah (författare)
- Consiglo Nazionale Delle Richerche
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- Lyonnard, Sandrine (författare)
- Université Grenoble Alpes,Grenoble Alpes University
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- Iadecola, A. (författare)
- Centre national de la recherche scientifique (CNRS)
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(creator_code:org_t)
- 2024
- 2024
- Engelska.
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Ingår i: Advanced Energy Materials. - 1614-6840 .- 1614-6832. ; In Press
- Relaterad länk:
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https://research.cha...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The intricate relationship between local atomic arrangements and electronic states significantly influences the electrochemical properties of Li-ion battery cathode materials. Despite decades of investigation, a consensus regarding the local atomic and electronic structure of LiNiO2 remains elusive. This ambiguity stems from the potential distortion of Ni sites, either via Jahn-Teller (JT) distortion or bond disproportionation (BD), complicating the understanding of the charge compensation mechanism involving Ni and O. This study compares the structures of LiNiO2 and NaNiO2, a JT system, using an innovative approach that integrates bulk spectroscopy techniques on standardized interoperable samples for enhanced reliability. While X-r and theoretical calculations fail to differentiate between the proposed scenarios, Raman spectroscopy highlights local structural distinctions between monoclinic NaNiO2 and rhombohedral LiNiO2. HAXPES confirms various formal oxidation states for Ni, supported by RIXS data indicating 3d8 states, emphasizing negative charge transfer from Ni and some bond disproportionation in LiNiO2. Regarding charge compensation, XRS and RIXS suggest oxygen hole involvement in redox activity, whereas Raman spectroscopy does not detect molecular oxygen. This comprehensive spectroscopic analysis highlights the importance of correlative characterization workflows in elucidating complex structural-electrochemical relationships.
Ämnesord
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Nyckelord
- batteries
- correlative spectroscopy
- electronic structure
- local atomic structure
- operando characterization
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Jacquet, Quentin
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Mozhzhukhina, Na ...
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Gillespie, Peter ...
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Wittmann, Gilles
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Ramirez, Lucia P ...
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Capone, Federico ...
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visa fler...
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Rueff, Jean Pasc ...
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Belin, Stephanie
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Dedryvere, R.
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Stievano, L.
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Matic, Aleksanda ...
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Suard, E.
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Brookes, Nichola ...
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Longo, Alessandr ...
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Prezzi, Deborah
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Lyonnard, Sandri ...
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Iadecola, A.
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visa färre...
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