Mn_2O_3/ErGO Nanocomposites for Supercapacitor Electrodes

摘要

In this report, we describe a simple two-step electro deposition method to synthesis Mn_2O_3/electrochemically reduced graphene oxide (ErGO) nanocomposites on the surface of Ni foam (NF) and used as the electrode of supercapacitors (SCs). The scanning electron microscope (SEM), characterization had shown that three-dimensional (3D) Mn_2O_3 nanoflakes were uniformly loaded on the ErGO/NF. The electrochemical experiments show that the introduction of ErGO improve the electrochemical performance of Mn_2O_3 greatly due to the large surface area and high conductivity of ErGO, which provide enough place for Mn_2O_3 and decrease the resistance. In addition, the 3D network of Mn_2O_3 also own high surface area and porous structure. In one word, the synergistic effect of the ErGO and 3D network of Mn_2O_3 made the electrode possesses high specific capacitance of 114.3 F g~(-1) at a current density of 1 A g~(-1).