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Open AccessArticle

Soft X-ray Absorption Spectroscopic Investigation of Li(Ni0.8Co0.1Mn0.1)O2 Cathode Materials

1
Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang 37673, Korea
2
Radiation Equipment Research Division, Korea Atomic Energy Research Institute, Jeongup 56212, Korea
3
Advanced Analysis Center, Korea Institute of Science and Technology, Seoul 02792, Korea
*
Authors to whom correspondence should be addressed.
Nanomaterials 2020, 10(4), 759; https://doi.org/10.3390/nano10040759
Received: 30 March 2020 / Revised: 10 April 2020 / Accepted: 12 April 2020 / Published: 15 April 2020
(This article belongs to the Special Issue Nanotechnologies and Nanomaterials: Selected Papers from CCMR)
Herein, we report the soft X-ray absorption spectroscopic investigation for Li(Ni0.8Co0.1Mn0.1)O2 cathode material during charging and discharging. These measurements were carried out at the Mn L-, Co L-, and Ni L-edges during various stages of charging and discharging. Both the Mn and Co L-edge spectroscopic measurements reflect the invariance in the oxidation states of Mn and Co ions. The Ni L-edge measurements show the modification of the oxidation state of Ni ions during the charging and discharging process. These studies show that eg states are affected dominantly in the case of Ni ions during the charging and discharging process. The O K-edge measurements reflect modulation of metal–oxygen hybridization as envisaged from the area-ratio variation of spectral features corresponding to t2g and eg states. View Full-Text
Keywords: cathode materials; orbital symmetry states; metal–oxygen hybridization cathode materials; orbital symmetry states; metal–oxygen hybridization
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Singh, J.P.; Park, J.Y.; Chae, K.H.; Ahn, D.; Lee, S. Soft X-ray Absorption Spectroscopic Investigation of Li(Ni0.8Co0.1Mn0.1)O2 Cathode Materials. Nanomaterials 2020, 10, 759.

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