Mn₂Sb₂O₇/Reduced Graphene Oxide Composites with High Capacity and Excellent Cyclic Stability as Anode Materials for Lithium‐Ion Batteries

Abstract

Abstract For the advancement of lithium‐ion batteries (LIBs), metal oxides with high theoretical specific capacities have been explored as anodes. Herein, we report a new metal oxide, Mn 2 Sb 2 O 7 ‐anchored reduced graphene oxide (Mn 2 Sb 2 O 7 /RGO), as an advanced anode for LIBs. The Mn 2 Sb 2 O 7 /RGO anode exhibits a higher capacity and better capacity retention compared to Mn 2 Sb 2 O 7 , because the close contact between Mn 2 Sb 2 O 7 and RGO facilitates charge transfer during cycling. The discharge capacity of Mn 2 Sb 2 O 7 /RGO reaches 706.72 mAh g −1 at 200 mA g −1 after 200 cycles. Even at 1000 mA g −1 , the capacity loss per cycle of Mn 2 Sb 2 O 7 /RGO is only 0.0344 % for 600 cycles, indicating an excellent high‐rate cyclic stability compared to other Sb‐based oxides. These results forecast that Mn 2 Sb 2 O 7 /RGO is a potential anode for LIBs, providing a new insight into the selection of high‐performance anodes.