Synthesis of Hollow SnO2/SnS2 Hybrids and their Application in Sodium‐Ion Batteries

Abstract Alloying‐type Sn material has been considered as an excellent anode material for sodium‐ion batteries (SIBs). However, the limitation of capacity is still a challenge that remains to be solved. In this approach, we introduce a facile two‐step hydrothermal route to prepare hollow SnO 2 /SnS 2 hybrids and investigate their electrochemical performances as anodes in SIBs for the first time. Benefiting from their structural features, the hollow SnO 2 /SnS 2 hybrids exhibit a high reversible sodium storage capacity of about 485.64 mA h g −1 at 300 mA g −1 after 100 cycles with a capacity retention of 78.7 %, which is much higher than 25.9 % for bare SnO 2 hollow spheres and 28.5 % for bare SnS 2 nanosheets. Taking into consideration the outstanding performance and the special structural design, this work could provide a potential strategy to improve the electrochemical performances of tin‐based electrodes, as well as that of other anodes in SIBs.