Facile synthesis of MoS2/SnS2/NC heterojunction nanosphere composite as high-performance anode material for sodium-ion batteries

SnS 2 is considered a potential anode material for sodium-ion batteries (SIBs) due to its high theoretical capacity, abundant resources and non-toxic properties. However, the low Na + diffusion kinetics and large volume expansion of SnS 2 hinder further development and application. Hence, the heterostructured MoS 2 /SnS 2 /NC nanospheres are synthetized through a facile hydrothermal reaction . By coating SnS 2 on MoS 2 templates, the heterojunction composite MoS 2 /SnS 2 /NC combines the advantages of the highly stable nanosphere structure of MoS 2 and the high theoretical capacity of SnS 2 . In conclusion, it delivers a high specific capacity of 603 mAh g −1 at 10 A g −1 after 2000 cycles and excellent rate performance of 750 mAh g −1 at 0.1 A g −1 . Furthermore, the full-battery of MoS 2 /SnS 2 /NC= |Na 3 V 2 (PO 4 ) 3 exhibits a great capacity of 69.8 mAh g −1 at 100 mA g −1 after 100 cycles. The excellent electrochemical performance of the heterojunction material proves it to be an extraordinary anode material for SIBs.