Journal
APPLIED PHYSICS LETTERS
Volume 104, Issue 5, Pages -Publisher
AIP Publishing
DOI: 10.1063/1.4864167
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Funding
- Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan [22686059, 23656395, 24760537]
- JSPS [25106003, 25106005]
- Institute of Industrial Science, The University of Tokyo [5504850103]
- Grants-in-Aid for Scientific Research [25106003, 24760537] Funding Source: KAKEN
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The redox reaction of Mn in Li2MnO3 was studied by X-ray absorption spectroscopy and ab initio multiplet calculation. Associated with the de-intercalation of Li-ion, small but clear spectral changes were observed in Mn-L-2,L-3 X-ray absorption near edge structure (XANES). The systematic ab initio multiplet calculations of Mn-L-2,L-3 XANES revealed that the spectral changes in the experiment could not simply be ascribed to the change of the valency from Mn4+ to Mn5+ but can be explained well by the changes of local atomic structures around Mn4+ due to the Li de-intercalation. Our results suggest that the electronic state of oxygen should change during charging in Li2MnO3. (C) 2014 AIP Publishing LLC.
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