Zn-MOFs derived porous carbon nanofiber for high performance lithium-ion batteries

One dimensional carbon based materials are emerging as promising but challenging anodes for lithium ion batteries (LIBs). Herein, we report a facile method to fabricate the porous carbon nanofibers (CNFs) using metal organic frameworks as hybrid by electrospun and calcination process. The obtained flexible and binder-free porous CNFs is 0.8-1 mu m in width, consist of discontinuous macropores with diameters of 100-300 nm. The macropores in the CNFs are forming 3D porous networks in all directions. As anode of LIBs, the porous CNFs exhibits a high capacity of 520 mAh g(-1) after 200 cycles, and high rate capability of 210 mAh g(-1) at a relative high current of 1000 mA g(-1). The excellent electrochemical performance is mainly attributed to the unique porous structure, which provides fast ion/electron transfer path and sufficient contact between active materials and electrolyte.