Facile synthesis of porous Mn2O3 microsphere as an anode material for lithium ion batteries

Abstract

The precursors of Mn2O3 was synthesized through co-precipitation method using MnAc2•4H2O, NaHCO3 as raw materials. The precursors were heat-treated at 400°C, 500°C, and 600°C, respectively. The samples were characterized by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The electrochemical properties of the samples were investigated also. The test results showed that the Mn2O3 (heat-treated at and 600°C) featured higher reversible capacity and better cycling performance than that of other samples. The specific capacity of the Mn2O3 samples (heat-treated at and 600°C) was 745 mAh/g respectively after 100 cycles at a constant current of 100 mA/g in the voltage range of 0.01-3 V. The preparation principle for the formation of the Mn2O3 samples and its electrochemical process of Mn2O3 were discussed also.