Preparation and Electrochemical Performance of Various Morphologies Cobalt Oxide as Anode Materials for Lithium-ion Batteries

摘要

Morphology controlled cobalt oxides are successfully prepared via hydrothermal reaction bymonitoring the hydrothermal time. After that, the two different morphologies of cobalt oxide (CO-100,CO-130) are used as anode materials for lithium-ion batteries. The SEM and TEM images show thatthe CO-100 exhibits hollow sphere structure, while the CO-130 displays layered hollow spherestructure. The electrochemical results indicate that the CO-130 has more excellent cycle stability andcapacity value than the CO-100. This phenomenon is ascribed to the novel structure of as-preparedCO-130, which could provide sufficient space for the electrolyte storage and wetting.