Abstract
The ternary composites, MSnO3 (M = Mn, Co, Zn) highly loaded on reduced graphene oxide (rGO) sheets were synthesized via a facile hydrothermal and calcination method, and they were used as sodium-ion batteries (SIBs) anode materials. The MSnO3 (M = Mn, Co, Zn)/rGO nanocomposites delivered initial discharge capacities of 754.9, 572.6, and 609.3 mAh g−1, respectively. Meanwhile, they can retain the discharge capacity of 237.0, 281.3 and 320.5 mAh g−1 after 100 cycles at 0.1 A g−1, which is much higher than those of bare MSnO3 (M = Mn, Co, Zn), delivering discharge capacities of 19.9, 126.3 and 87.4 mAh g−1 in SIBs, respectively. Besides, the superior electrochemical behavior of the MSnO3/rGO composites is further confirmed via a kinetics analysis, which shows that the composites have much faster interfacial charge transfer process, demonstrating their excellent sodium storage behavior. To our best knowledge, this is the first attempt to use MSnO3 (M = Mn, Co, Zn)/rGO as anode materials for SIBs. This work provides a new avenue towards enhancing sodium storage performance in SIBs.
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