Chemical delithiation and exfoliation of LixCoO2

Angelika Basch, Liliana De Campo, Jorg Albering, John White

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Progressive chemical.delithiation of commercially available lithium cobalt oxide (LixCoO2) showed consecutive changes in the crystal properties. Rietveld refinement of high resolution X-ray and neutron diffraction revealed an increased lattice parameter c and a reduced lattice parameter a 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 LixCoO2 with x=1/3 that causes the grains to exfoliate. The pattern of etches by delithiation suggests that unrelieved strain fields may produce chemical activity.
    Original languageEnglish
    Pages (from-to)102-110
    JournalJournal of Solid State Chemistry
    Volume220
    DOIs
    Publication statusPublished - 2014

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