Multilayered Cobalt Oxide Platelets for Negative Electrode Material of a Lithium-Ion Battery

Layer-controllable CoO and platelets were prepared by calcination of hexagonal , which was synthesized via a surfactant-free hydrothermal method. As negative electrode material for lithium-ion batteries, CoO and platelets demonstrated high reversible capacity (more than for CoO and for ) and excellent electrochemical cycling stability. The multilayered CoO platelets showed larger capacity and much better cycling performance than the monolayer CoO platelets and CoO nanoparticles. The effect of dimension and morphology of CoO particles on the electrode behavior was discussed.