Enhanced electrochemical performance of hierarchical CoFe ₂ O ₄ /MnO ₂ /C nanotubes as anode materials for lithium-ion batteries

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We report a facile preparation of MnO ₂ nanosheet-coated CoFe ₂ O ₄ nanofibers containing carbon for lithium ion batteries. The CoFe ₂ O ₄ /MnO ₂ /C nanotubes exhibit a reversible capacity of 713.6 mA h g ⁻¹ at 100 mA g ⁻¹ after 250 cycles.