Abstract:Process to recycle lithium cobalt oxide cathode material directly from scrap of cobalt-aluminium film was investigated. The results show that 81% of lithium cobalt oxide cathode material can be recovered under the conditions including reaction temperature of 50 ℃, reaction time of 2 h, triethanolamine concentration of 0.5 mol/L, ratio of solid to liquid of 0.75/10, and ultrasonic frequency of 18 kHz. The process exerts much fewer damaging effects on lithium cobalt oxide than other strong acid system. With little change on structure and morphology, lithium cobalt oxide can be recycled directly to produce lithium battery.