This article is cited in 5 papers

Semiconductors

X-ray spectra and specific features of the structure of lithium-sodium cobaltite Li$_x$Na$_y$CoO$_2$

V. V. Mesilov^a, V. R. Galakhov^a, A. S. Semenova^b, D. G. Kellerman^b, L. V. Elohina<sup>a

a</sup> Institute of Metal Physics, Ural Branch of the Russian Academy of Sciences, Ekaterinburg
^b Institute of Solid State Chemistry, Urals Branch of the Russian Academy of Sciences, Ekaterinburg

Abstract: The electronic structure and specific features of the structure of nonstoichiometric cobaltite Li$_x$Na$_y$CoO$_2$ ($x$ = 0.42, $y$ = 0.36) have been studied comprehensively. The calculated multiplet for the lowspin state of the Co$^{3+}$ ion agrees with the experimental spectra. It has been established using X-ray absorption spectra measured in the total photoelectric effect yield and total fluorescence yield modes that the Li$_x$Na$_y$CoO$_2$ cobaltite is stoichiometric with respect to the alkali metal near its surface and is defective inside. It has been demonstrated that the charge compensation in the case of an alkali metal deficit in Li$_x$Na$_y$CoO$_2$ is due to holes in O 2$p$ states.

Received: 07.06.2010

 English version: Physics of the Solid State, 2011, 53:2, 271–275

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