Metal oxide composites derived from Metal Organic Framework (MOF)

Metal−organic frameworks (MOFs), a new class of porous crystalline materials, have attracted enormous attentions in many applications over the past two decades because of their high surface area, tunable porosity and controllable structures[1]. Recently, MOFs have been shown to easily transform into metal oxides, metal oxide/carbon, and metal oxide composites after heat treatment, which has drawn great attention for energy conversion and storage applications. Furthermore, MOFs are not restricted to only the exploitation of single metal oxides but can also be used to prepare a variety of metal oxide composites[2]. Thus, herein one Metal based iron oxide derived metal-organic frameworks are fabricated through a general facile strategy. The intrinsic hollow nanostructure can shorten the lengths for both electronic and ionic transport, enlarge the surface areas of electrodes, and the improve accommodation of the volume change during Li insertion/extraction cycling[3]. The hybrid multielements characteristics allow the volume change to take place in a stepwise manner during electrochemical cycle. Therefore, as-prepared metal oxide electrode exhibits outstanding performance as anode materials for lithium ion batteries. As an anode material for LIBs, the capacity retained 1770 mAh g-1 after 25 cycles at a current density of 200 mAh g-1