Abstract
CoNi-contained nanosheets can be prepared by dealloying CoNiAl alloys in aqueous NaOH solution in the presence of H2O2, and upon annealing sample exhibits dendritic NiCo2O4 micro-nanostructure. The effect of H2O2 solution on the structure, morphology, and electrochemical performances of the resulting products is studied systematically. These results indicate that the H2O2 solution mainly influences the morphology of the NiCo2O4. When tested as anode materials for lithium-ion batteries (LIBs), the obtained NiCo2O4 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 NiCo2O4 anode make them promising anode materials of LIBs and other energy storage applications.
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Funding
This work was supported by the Natural Science Foundation of Shandong Province (ZR2017BEM020 and ZR2019PB019) and Major Science and Technological Innovation Project of Shandong Province (2019JZZY010457).
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Zhang, M., Li, D., Yang, L. et al. Dendritic micro-nano NiCo2O4 anode material generated from chemical dealloying for high-performance lithium-ion batteries. Ionics 26, 5385–5392 (2020). https://doi.org/10.1007/s11581-020-03726-y
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DOI: https://doi.org/10.1007/s11581-020-03726-y