NiCo2S4/Carbon Nanotube Composites As Anode Material for Lithium-Ion Batteries

NiCo 2 S 4 and NiCo 2 S 4 /carbon nanotube (CNT) nanocomposites were synthesized via a one-step hydrothermal approach. As anode materials for lithium-ion batteries (LIBs), the NiCo 2 S 4 /CNT nanocomposite delivers significantly improved cycling stability and excellent rate performance, compared with the pure NiCo 2 S 4 . It retains a discharge capacity of 1405.7 mAh g −1 after 80 cycles at 200 mA g −1 with only 9.2% capacity degradation. Moreover, a discharge capacity of 711.6 mAh g −1 after 390 cycles can still be maintained even at a high current density of 1 A g −1 . The results demonstrate that the NiCo 2 S 4 /CNT nanocomposite holds great potential for applications in LIBs.