Bio-Inspired Rose-Like Bi@Nitrogen-Enriched Carbon towards High-Performance Lithium-Ion Batteries

摘要

Rose-like Bi@N-doped carbon nanocomposite was fabricate by a facile hydrothermal method, followed by polydopamine coating for different time and subsequent carbonization for the first time. Structural and morphological characterization shows that Bi@N-doped carbon nanocomposite have a homogeneous rose-like structure, with crystallized Bi nanoparticles embedded homogeneously in the carbon matrix. The optimal Bi@N-doped carbon nanocomposite used as anode for rechargeable lithiumion batteries (LIBs) presents a reversible capacity of 712 mAh g~(-1) for initial cycle at a current density of 200 mA g~(-1) and exhibits outstanding cyclability with a capacity of 535 mAh g~(-1) after 450 cycles at 200 mA g~(-1) . The outstanding electrochemical performance of the Bi@N-doped carbon nanocomposite can be ascribed to the synergetic effects of various factors including the unique rose-like structure, nano-sized Bi particles and nitrogen doping carbon matrices.