Three‐Dimensionally “Curved” NiO Nanomembranes as Ultrahigh Rate Capability Anodes for Li‐Ion Batteries with Long Cycle Lifetimes

Three-dimensionally “curved” NiO nanomembranes made using a simple fabrication technique followed by a thermal oxidation process are reported. As anode materials for lithium ion batteries, the curved NiO nanomembranes exhibit impressive results, i.e., ultrafast power rate (50 C), a high capacity of 721 mAh g−1 at 1.5 C, and a long lifetime of 1400 cycles, making them attractive for high power Li-ion batteries.