Abstract
Metal−organic frameworks (MOF) are promising precursors to obtain novel electrode materials for Li-ion batteries (LIBs). Herein, we report a convenient and straightforward one-pot pyrolysis strategy to prepare MOF-derived Ni/CoFe2O4@C nanocomposite by using tri-metal FeCoNi-MOF-74 as a precursor. The Ni/CoFe2O4@C anode exhibits excellent electrochemical performance with a reversible capacity of 962 mAh g−1, after 50 charge/discharge cycles, at the current density of 100 mA g−1. Moreover, the Ni/CoFe2O4@C electrode renders excellent cyclic performance and superior rate capability due to its novel structure. The superior electrochemical performance can be ascribed to the synergistic influence of Ni and CoFe2O4 as well as the unique porous structure of multiple complex. The analysis of intercalation kinetics reveals that the pseudocapacitance dominates the charge storage behavior of Ni/CoFe2O4@C anode, which can be attributed to excellent porous structure. These results demonstrate that the as-synthesized Ni/CoFe2O4@C nanocomposite is a promising anode material for LIBs.
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