Ternary chalcogenide LiInSe2: A promising high-performance anode material for lithium ion batteries

Ternary chalcogenides have drawn intense interest as promising alternative anode materials for Li-storage systems benefiting from their high specific capacity. Herein, the electrochemical performance of a new ternary chalcogenide LiInSe₂ used for lithium ion anode has been reported for the first time. Furthermore, in view of carbon-coating treatment, the optimized anode LiInSe₂@C for Li-ion batteries exhibits enhanced capacitive behavior and high rate capability. LiInSe₂@C presents a high reversible capacity of 409.1 mA h g⁻¹ at 100 mA g⁻¹ and a reversible capacity of 270 mA h g⁻¹ after 1000 cycles at 1000 mA g⁻¹. Further analyses evidence that the outstanding rate performance stems from fast electrochemical kinetics, enhanced by the pseudocapacitive effect and improved electronic/ionic conductivity. These results elucidate the attractive lithium storage performance of LiInSe₂ compound, and would offer a practical polestar to explore novel ternary chalcogenide for energy storage.