Abstract

[ LiCoO_2 ] a cathode material for lithium rechargeable batteries, was prepared using recycled Co_3O_4. First, the cobalt hydroxide powders were separated from waste WC-Co hard metal with acid-base chemical treatment, and then the impurities were eliminated by centrifuge method. Subsequently, Co_3O_4 powders were prepared by thermal treatment of resulting Co(OH)_2. By adding a certain amount of Li_2CO_3 and LiOHcdotH_2O, the LiCoO_2 was obtained by sintering for 10 h in air at 800°C. The synthesized LiCoO_2 particles were characterized by X-ray diffraction (XRD) and Scanning Electron Microscope (SEM) analysis.

• Keywords: WC-Co composite powder;Recycle;Cobalt oxide;Lithium cobalt oxide;