Research about Wire-like Structure Iron Oxide Anode for Lithium-ion Batteries

Abstract

Abstract Nano scaled iron oxides have attracted much attention as the anode materials of the lithium-ion batteries, because of its high theoretical capacity, high-capacity retention compared with bulk iron oxides and current commercialized graphite anode. Other benefits including rich abundance, environmental friendliness, low cost and even low toxicity even make it possible to be commercialized. However, problems such as the capacity loss over the first cycle and the capacity retention over the long run are still not satisfying. Thus, this work presents wire-like Fe3O4 core-shell NPs, synthesized by MFI method and high temperature annealing, for using as the anode of lithium-ion batteries. And the wire-like core-shell structure of this material was estimated to have a better electrochemical performance by reducing the aggregation particles and providing a stable nanostructure. In addition to the analysis of the characterization tests, analysis on the electrochemical tests was done in this work, including Cyclic voltammogram and galvanostatic charge and discharge. And the wire-like Fe3O4 core-shell NPs was estimated to show a 1000 mAh g−1 over 100 cycles. Furthermore, future work and challenges from the aspect of synthesizing conditions and further modification of wire-like Fe3O4 core-shell NPs were briefly discussed.