Abstract
NiCo2O4 microellipsoids have been synthesized by a rheological-phase hydrothermal method to obtain the precursors followed by annealing at 450°C for 4 h. The effects of different hydrothermal temperatures (140°C to 180°C) on the morphologies and electrochemical properties of the final product were systematically investigated. NiCo2O4 microellipsoids synthesized at 180°C exhibited the best electrochemical properties, with high reversible capacity (921 mAh g−1 at current density of 100 mA g−1) and good cycling stability (820 mAh g−1 even after 100 cycles), compared with other samples. They also delivered discharge capacity of 586 mAh g−1 at relatively high current density of 800 mA g−1. The remarkable electrochemical performance of the NiCo2O4 microellipsoids can be attributed to their high surface area. These results indicate that NiCo2O4 microellipsoids could be a promising electrode material for lithium-ion batteries.
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Zheng, H., Xu, S., Li, L. et al. Synthesis of NiCo2O4 Microellipsoids as Anode Material for Lithium-Ion Batteries. J. Electron. Mater. 45, 4966–4972 (2016). https://doi.org/10.1007/s11664-016-4675-2
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DOI: https://doi.org/10.1007/s11664-016-4675-2