Magnetic Sn/SnO/FeSn2 nanocomposite as a high-performance anode material for lithium-ion batteries

Abstract Magnetic nanocomposite often compounds diverse physical and chemical properties to realize some novel functions. Herein, the design of a novel magnetic Sn/SnO/FeSn2 nanocomposite via a one-pot method under reducing conditions is demonstrated at the first time. The three phases, i.e., Sn, SnO, and FeSn2, were evenly distributed in the nanocomposite to reach high electrochemical performance and structural stability. The as-prepared magnetic Sn/SnO/FeSn2 nanocomposite as the anode material for lithium-ion batteries(LIBs) exhibit superior reversible capacity and cycling stability. Specially, the electrode made of the magnetic Sn/SnO/FeSn2 nanocomposite has a high specific capacity of 791 mAh g−1 and 528 mAh g−1 under the current density of 200 mA g−1 and 2000 mA g−1, respectively, and it exhibits a capacity retention of 92% after 1000 cycles under the current density of 2000 mA g−1. Overall, the as-prepared magnetic Sn/SnO/FeSn2 nanocomposite has been demonstrated as a promising candidate anode material for LIBs.