The influence of nonstoichiometry on changes in the electronic structure of lithium cobaltite caused by chemical deintercalation of Li 1+xCoO2 (0 ≤ x ≤ 0.1) / Kaichev V.V., Kosova N.V., Devyatkina E.T., Bukhtiyarov V.I., Kellerman D.G. // Russian Journal of Physical Chemistry A. - 2003. - V. 77, l. 9. - P. 1445-1450.

ISSN:

00360244

Type:

Article

Abstract:

Changes in the electronic structure of lithium cobaltites Li 1+xCoO2 (0 ≤ x ≤ 0.1) during chemical deintercalation were studied by X-ray diffraction; IR, X-ray photoelectron, and diffuse reflectance electron spectroscopy; and magnetic measurements. Acid treatment was shown to cause the partial removal of lithium from the oxide structure and the appearance of delocalized electrons in the system. The electronic state of cobalt ions did not change significantly, whereas oxygen ions were oxidized (O2- → O-). Structural defects in delithiated oxides had the same nature as in the initial superstoichiometric oxides; these structural defects were low-coordinate oxygen ions in the O - state. The structure of oxides containing excess lithium was stabler during chemical deintercalation. The magnetic properties of delithiated oxides were determined by (Co3+-O-) exchange-coupled pairs.

Author keywords:

Index keywords:

acid; cobalt derivative; lithium cobaltite; nonstoichiometric compound; oxide; oxygen; unclassified drug; article; chemical interaction; chemical modification; chemical structure; electron; electronic

DOI:

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Link	https://www.scopus.com/inward/record.uri?eid=2-s2.0-0141889169&partnerID=40&md5=fd8cd6745bb17ec5ef7e0c1cea43325f
Affiliations	Boreskov Institute of Catalysis, Siberian Division, Russian Academy of Sciences, pr. akademika Lavrent'eva 5, Novosibirsk, 630090, Russian Federation; Inst. Solid-State Chem./M., Siberian Division, Russian Academy of Sciences, Novosibirsk, Russian Federation; Institute of Solid-State Chemistry, Ural Division, Russian Academy of Sciences, ul. Pervomaiskaya 91, Yekaterinburg, 620219, Russian Federation
Chemicals/CAS	oxide, 16833-27-5; oxygen, 7782-44-7
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Correspondence Address	Kaichev, V.V.; Boreskov Institute of Catalysis, Siberian Division, Russian Academy of Sciences, pr. akademika Lavrent'eva 5, Novosibirsk, 630090, Russian Federation; email: kosova@solid.nsc.ru
Language of Original Document	English
Abbreviated Source Title	Russ. J. Phys. Chem. A
Source	Scopus