Electronic structure of Li1+x[Mn0.5Ni0.5]1-xO2 studied by photoemission and x-ray absorption spectroscopy

Y. Yokoyama, D. Ootsuki, T. Sugimoto, H. Wadati, J. Okabayashi, Xu Yang, Fei Du, Gang Chen, T. Mizokawa

研究成果: Article査読

2 被引用数 (Scopus)


We have studied the electronic structure of Li1+x[Mn0.5Ni0.5]1-xO2 (x = 0.00 and 0.05), one of the promising cathode materials for Li ion battery, by means of x-ray photoemission and absorption spectroscopy. The results show that the valences of Mn and Ni are basically 4+ and 2+, respectively. However, the Mn3+ component in the x = 0.00 sample gradually increases with the bulk sensitivity of the experiment, indicating that the Jahn-Teller active Mn3+ ions are introduced in the bulk due to the site exchange between Li and Ni. The Mn3+ component gets negligibly small in the x = 0.05 sample, which indicates that the excess Li suppresses the site exchange and removes the Jahn-Teller active Mn3+.

ジャーナルApplied Physics Letters
出版ステータスPublished - 2015 7 20

ASJC Scopus subject areas

  • 物理学および天文学(その他)


「Electronic structure of Li<sub>1+</sub><sub>x</sub>[Mn<sub>0.5</sub>Ni<sub>0.5</sub>]<sub>1-</sub><sub>x</sub>O<sub>2</sub> studied by photoemission and x-ray absorption spectroscopy」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。