Mesoporous ZnCo₂O₄/rGO nanocomposites enhancing sodium storage

In this study, mesoporous ZnCo₂O₄/rGO nanocomposites were favorably synthesized via a simple solvothermal technique. As a prospective anode material for sodium-ion batteries, the resulting ZnCo₂O₄/rGO-II nanocomposite exhibited superior electrochemical sodium storage performance with predominant specific capacity, favorable cyclability and ascendant rate capability. For example, an outstanding discharge capacity of 210.5 mAh g^-1 was delivered at a current density of 200 mA g^-1. Notably, the nanocomposite could yield a discharge capacity of 101.7 mAh g^-1 at a current density of 1000 mA g^-1 after 500 loops, which certifies its superior capacity retention and predominant cycling stability. The boosted performance of the anode materials is due to the mutual synergistic effect resulting from a combination of the mesoporous ZnCo₂O₄ nanospheres and conducting reduced graphene oxide nanosheets.