Progressive chemical .delithiation of commercially available lithium cobalt oxide (LiCoO2) 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.
Basch, A., De Campo, L., Albering, J. H., & White, J. W. (2014). Chemical delithiation and exfoliation of LixCoO2. Journal of Solid State Chemistry, 220(1), 102–110. https://doi.org/10.1016/j.jssc.2014.08.011