Observation of Valence State Change in Layered Li1-yNi1/3Mn1/3Co1/3O2

Journal Article · Fri Feb 02 00:00:00 EST 2007 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2644564· OSTI ID:21054660

Kobayashi, Hironori; Tatsumi, Kuniaki ^[1]; Arachi, Yoshinori ^[2]; Emura, Shuichi ^[3]; Handa, Katsumi ^[4]

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1. Research Institute for Ubiquitous Energy Devices, National Institute of Advanced Industrial Science and Technology (AIST), Ikeda, Osaka, 563-8577 (Japan)
2. Unit of Chemistry, Faculty of Engineering, Kansai University, Suita, Osaka, 564-8680 (Japan)
3. Institute of Scientific and Industrial Research (ISIR), Osaka University, Ibaraki, Osaka, 567-0047 (Japan)
4. SR Center, Ritsumeikan University, Kusatsu, Shiga, 525-8577 (Japan)

Valence state changes in Li1-yNi1/3Mn1/3Co1/3O2 were investigated using hard and soft X-ray absorption fine structure (XAFS) measurements. Reversible changes in the M-O bond lengths and in the position of the M L-edge peak (M Ni, Co) were observed during the first charge and discharge cycle. These results demonstrate that Li de-intercalation/intercalation proceeds mainly by changes in the valence states of the Ni and Co cations. In addition, it has been shown that the host material LiNi1/3Mn1/3Co1/3O2 had a surface structure free of Li2CO3.

• OSTI ID: 21054660
• Journal Information: AIP Conference Proceedings, Vol. 882, Issue 1; Conference: XAFS13: 13. international conference on X-ray absorption fine structure, Stanford, CA (United States), 9-14 Jul 2006; Other Information: DOI: 10.1063/1.2644564; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION SPECTROSCOPY
BOND LENGTHS
CATIONS
COBALT OXIDES
FINE STRUCTURE
HARD X RADIATION
LITHIUM CARBONATES
LITHIUM COMPOUNDS
MANGANESE COMPOUNDS
NICKEL COMPOUNDS
SOFT X RADIATION
SURFACES
VALENCE
X-RAY SPECTRA
X-RAY SPECTROSCOPY