In Situ Synthesis of Porous Fe₃O₄/C Microbelts and Their Enhanced Electrochemical Performance for Lithium-Ion Batteries

The porous Fe₃O₄/C microbelts (FCBs) were synthesized by simple electrospinning method, combined with carbonization of the precursor microbelts at high temperature in N₂ flow. Compared with α-Fe₂O₃ microbelt, the FCBs show better cyclic performance. The high capacity of 710 mA h g^–1 is still maintained after 50 cycles. The excellent performance of FCBs in lithium-ion batteries can be attributed to the highly stable porous belt structure of FCBs and to the substantial structure carbon matrix surrounded Fe₃O₄ nanoparticles. The synthesis method is simple, cheap, and green and could be extended to fabricate other carbon composites