Non-cooperative Jahn-Teller effect in LiNiO2: An EXAFS study

https://doi.org/10.1016/0038-1098(95)00020-8Get rights and content

Abstract

Lithium nickel oxide, used as positive electrode in rechargeable lithium batteries, exhibits a layered structure made of NiO2 slabs between which Li+ ions are inserted in an octahedral environment. In fact, stoichiometric LiNiO2 has never been reported, the true formula is Li1−zNi1+zO2 (0.0<z≤0.20). z depending on the experimental conditions. Special attention devoted to the synthesis conditions, has allowed us to obtain quasi-2D LiNiO2. EXAFS spectroscopy shows clearly the existence of two different NiO bond lengths: at 1.91 Å (for four of them) and 2.09 Å for the two last ones. This local distortion of the NiO6 octahedra results from the Jahn-Teller effect of the trivalent nickel ion in the low spin state t26e1.

References (20)

  • J.B. Goodenough et al.

    J. Phys. Chem. Solids

    (1958)
  • P. Oliva et al.

    J. of Power Sources

    (1982)
  • M.G.S.R. Thomas et al.

    Mat. Res. Bul.

    (1985)
  • M. Broussely et al.

    J. of Power Sources

    (1993)
  • J. Morales et al.

    Mat. Res. Bull.

    (1990)
  • P.F. Bongers et al.

    J. Solid State Commun.

    (1966)
  • O. Glemser et al.

    Z. anorg. allg. Chem.

    (1950)
  • C. Delmas et al.

    Mol. Cryst. Liq. Cryst.

    (1994)
  • J.N. Reimers et al.

    Solid State Ionics

    (1990)
  • J.R. Dahn et al.

    J. of Solid State Chemistry

    (1993)
There are more references available in the full text version of this article.

Cited by (213)

View all citing articles on Scopus
View full text