Synergistically Enhanced Electrochemical Performance in Electrospun Core‐Shell Nanofiber for Lithium‐Ion Batteries

Abstract NiO@Co 3 O 4 core‐shell oxide nanofiber (NF) with diameter of 200 nm were prepared by a simple sol‐gel based on electrospinning method. When applied as an anode material for lithium‐ion batteries (LIBs), it delivers stable cyclic performance with specific capacity of 487 mAh g −1 after 200 cycles at 0.5 C. Moreover, high rate capabilities are observed in each current density in the core‐shell nanofiber. This indicates that the electrochemical performance of the core‐shell nanostructure significantly enhances reversible capacity and high rate capabilities over NiO and Co 3 O 4 nanofibers. Such an enhanced electrochemical performance is attribute to the synergistic effect between each component.