Cactus-like iron oxide/carbon porous microspheres lodged in nitrogen-doped carbon nanotubes as anodic electrode materials of lithium ion batteries

A highly active cactus-like Fe 2 O 3 /C@NCNT micro-nano-structure was firstly fabricated by a metal-catalyzed graphitization-nitridization driven tip-growth process and air oxidation induced Kirkendall effect, which showed an extraordinary electrochemical performance in LIBs.