Sn‐MoS 2 ‐C@C Microspheres as a Sodium‐Ion Battery Anode Material with High Capacity and Long Cycle Life

Sodium ion batteries (SIBs) have been regarded as a prime candidate for large‐scale energy storage, and developing high performance anode materials is one of the main challenges for advanced SIBs. Novel structured Sn‐MoS 2 ‐C@C microspheres, in which Sn nanoparticles are evenly embedded in MoS 2 nanosheets and a thin carbon film is homogenously engineered over the microspheres, have been fabricated by the hydrothermal method. The Sn‐MoS 2 ‐C@C microspheres demonstrate an excellent Na‐storage performance as an anode of SIBs and deliver a high reversible charge capacity (580.3 mAh g −1 at 0.05 Ag −1 ) and rate capacity (580.3, 373, 326, 285.2, and 181.9 mAh g −1 at 0.05, 0.5, 1, 2, and 5 Ag −1 , respectively). A high charge specific capacity of 245 mAh g −1 can still be achieved after 2750 cycles at 2 Ag −1 , indicating an outstanding cycling performance. The high capacity and long‐term stability make Sn‐MoS 2 ‐C@C composite a very promising anode material for SIBs.