Porous ZnCo_2O_4 nanowires synthesis via sacrificial templates: High-performance anode materials of li-ion batteries

摘要

A simple microemulsion-based method has been developed to synthesize ZnCo_2(C_2O_4)_3 nanowires that can be transformed to porous ZnCo_2O_4 nanowires under annealing conditions. The morphology of porous ZnCo2O4 nanowires can be tuned by the initial ZnCo_2(C_2O_4) _3 nanowires and the annealing temperatures. The as-synthesized porous ZnCo_2O_4 nanowires have been applied as anode materials of Li-ion batteries, which show superior capacity and cycling performance. The porous one-dimensional (1D) nanostructures and large surface area are responsible for the superior performance. Moreover, it is indicated that porous ZnCo_2O_4 nanowires synthesized at low annealing temperature (500 °C) show larger capacity and better cycling performance than that prepared at high annealing temperature (700 °C), because of their higher porosity and larger surface area.