N‑Doped
Amorphous Carbon Coated Fe<sub>3</sub>O<sub>4</sub>/SnO<sub>2</sub> Coaxial Nanofibers as a Binder-Free
Self-Supported Electrode for Lithium Ion Batteries
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Abstract
N-doped amorphous carbon coated Fe<sub>3</sub>O<sub>4</sub>/SnO<sub>2</sub> coaxial nanofibers were prepared
via a facile approach. The
core composite nanofibers were first made by electrospinning technology,
then the shells were conformally coated using the chemical bath deposition
and subsequent carbonization with polydopamine as a carbon source.
When applied as a binder-free self-supported anode for lithium ion
batteries, the coaxial nanofibers displayed an enhanced electrochemical
storage capacity and excellent rate performance. The morphology of
the interwoven nanofibers was maintained even after the rate cycle
test. The superior electrochemical performance originates in the structural
stability of the N-doped amorphous carbon shells formed by carbonizing
polydopamine