Chemical delithiation and exfoliation of [Formula: see text]

Progressive chemical .delithiation of commercially available lithium cobalt oxide ([Formula: see text]) showed consecutive changes in the crystal properties. Rietveld refinement of high resolution X-ray and neutron diffraction revealed an increased lattice parameter and a reduced lattice parameter f...

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Bibliographic Details
Published inJournal of solid state chemistry Vol. 220; pp. 102 - 110
Main Authors Basch, Angelika, de Campo, Liliana, Albering, Jörg H, White, John W
Format Journal Article
LanguageEnglish
Published United States 01.12.2014
Subjects
Li-ion Battery
Chemical delithiation
Rietveld refinement
Intercalation
Neutron diffraction
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Summary:Progressive chemical .delithiation of commercially available lithium cobalt oxide ([Formula: see text]) showed consecutive changes in the crystal properties. Rietveld refinement of high resolution X-ray and neutron diffraction revealed an increased lattice parameter and a reduced lattice parameter for chemically delithiated samples. Using electron microscopy we have also followed the changes in the texture of the samples towards what we have found is a critical layer stoichiometry of about [Formula: see text] with =1/3 that causes the grains to exfoliate. The pattern of etches by delithiation suggests that unrelieved strain fields may produce chemical activity.
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ISSN:0022-4596
DOI:10.1016/j.jssc.2014.08.011