Preparation of a γ-Fe2O3/Ag Nanowire Coaxial Nanocable for High-Performance Lithium-Ion Batteries

In this study, we report the design and synthesis of a silver nanowire-gamma-Fe2O3 coaxial nanocable architecture (Ag NWs@gamma-Fe2O3 nanocable) through mild oxidation of [Fe(CO)(5)] on the surface of silver nanowires followed by a calcination process. After optimization of the structural design, the Ag NWs@gamma-Fe2O3 nanocable could deliver superior lithium storage performance in terms of high reversible capacity, good rate performance, and excellent stability, such as a high reversible capacity of about 890 mAhg(-1) after 60 cycles at a current rate of 0.1 C (1.0 C= 1005 mAg(-1)). The re-versible capacity remains as high as about 550 mAhg(-1) even at a high current rate of 2.0 C. This dramatic performance is mainly attributed to the smart coaxial design, which can not only alleviate the large volume change and prevent the aggregation of gamma-Fe2O3 nanoparticles, but also enables good conductivity and thus enhances fast charge transfer. The unique structural features of the Ag NWs@gamma-gFe(2)O(3) nanocable represent a promising anode material in lithium-ion battery applications.