Self-supported porous CoO semisphere arrays as binder-free electrodes for high-performance lithium ion batteries

Construction of hierarchical porous metal oxides arrays is critical for the development of high-performance electrochemical energy storage devices. Herein we report porous CoO semisphere arrays using an electrodeposited polystyrene template method. Interestingly, the as-prepared porous CoO semisphere arrays consist of bowl-like semispheres with diameters of ∼500 nm and show highly porous structure. As a preliminary test as anode for lithium ion...