Changes in the structure and physical properties of Li1-yNi 0.5Mn0.4Ti0.1O2 (y=0 and 0.5)

Hironori Kobayashi, Yoshinori Arachi, Hiroyuki Kageyama, Hikari Sakaebe, Kuniaki Tatsumi, Daisuke Mori, Ryoji Kanno, Takashi Kamiyama

Research output: Contribution to journalConference articlepeer-review

Abstract

Li1-yNi0.5Mn0.4Ti0.1O 2 (y=0 and 0.5) was synthesized and characterized using X-ray diffraction, XAFS, and SQUID measurements. The samples were single-phase and adopted the α-NaFeO2 structure. Li1-yNi 0.5Mn0.4Ti0.1O2 (y=0 and 0.5) can be represented as Li(Ni0.52+Mn0.4 4+Ti0.14+)O2 and Li 0.5(Ni0.53+Mn0.44+Ti 0.14+)O2, respectively. Structural analysis demonstrated that the lattice parameter a decreased from 2.895 to 2.856 Å, the lattice parameter c increased from 14.317 to 14.509 Å, and the Ni-O bond length decreased from 2.06 to 1.94 Å with de-lithiation. The low occupation of Ni on the 3a site was confirmed from the ferromagnetic behavior caused by the 180° Ni2+(3a)-O-Mn4+(3b)-O-Ni 2+ (3a) superexchange interaction. These results indicated that lithium de-intercalation from LiNi0.5Mn0.4Ti 0.1O2 was controlled mainly by changing the valence state of Ni from 2+ to 3+.

Original languageEnglish
Pages (from-to)221-224
Number of pages4
JournalSolid State Ionics
Volume175
Issue number1-4
DOIs
Publication statusPublished - Nov 30 2004
Externally publishedYes
EventFourteenth International Conference on Solid State Ionics - Monterey, CA., United States
Duration: Jun 22 2003Jun 27 2003

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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