Wafer-like FeSe2-NiSe2/C nanosheets as efficient anode for high-performances lithium batteries

Owing to the high-energy capacity and safety characteristics, transition metal selenides are considered as the promising anode materials for lithium-ion batteries, which has aroused widespread interest in recent years. Thus FeSe2-NiSe2/C multi-layer sheets ([email protected]) are prepared after hydrothermal process and ball-milling treatment. The layers with large surface area provide low Li-ion diffusion energy barrier to achieve long-cycle and high energy. The [email protected] electrode shows an excellent rate performance. Moreover it delivers a high reversible capacity of 700.5 mAh g−1 after 100 cycles at 1 A g−1.