Ternary tin-based chalcogenide nanoplates as a promising anode material for lithium-ion batteries

Abstract As an advanced anode material for lithium-ion batteries, tin-chalcogenides receive substantial attention due to their high lithium-ion storage capacity. Here, tin chalcogenide (SnSe 0.5 S 0.5 ) nanoplates are synthesized using a facile and quick polyol-method, followed by heating at different temperatures. Results show that the as-prepared of SnSe 0.5 S 0.5 heated at temperature of 180 °C exhibits the best electrochemical performance with an outstanding discharge specific capacity of 1144 mA h g −1 at 0.1 A g −1 after 100 cycles and 682 mA h g −1 at 0.5 A g −1 after 200 cycles with a high coulombic efficiency (CE) of 98.7%. Even at a high current density of 5 A g −1 , this anode material delivers a specific capacity of 473 mA h g −1 . The high electrochemical performance of SnSe 0.5 S 0.5 is shown by in-situ XRD analysis to originate from an enhanced Li + intercalation and an alloy conversion process.