Dendritic micro-nano NiCo 2 O 4 anode material generated from chemical dealloying for high-performance lithium-ion batteries

CoNi-contained nanosheets can be prepared by dealloying CoNiAl alloys in aqueous NaOH solution in the presence of H 2 O 2 , and upon annealing sample exhibits dendritic NiCo 2 O 4 micro-nanostructure. The effect of H 2 O 2 solution on the structure, morphology, and electrochemical performances of the resulting products is studied systematically. These results indicate that the H 2 O 2 solution mainly influences the morphology of the NiCo 2 O 4 . When tested as anode materials for lithium-ion batteries (LIBs), the obtained NiCo 2 O 4 sample shows high specific capacity, excellent rate property, and superb cycling stability. A reversible capacity is still maintained at 1016.9 mAh/g after 100 cycles at a current density of 100 mA/g. Even at a current rate of 1000 mA/g, the capacity can reach to 691.4 mAh/g. The outstanding electrochemical properties of the NiCo 2 O 4 anode make them promising anode materials of LIBs and other energy storage applications.