Abstract: Sn-based compounds have attracted much attention in the field of energy storage device, such as lithium-ion batteries and sodium-ion batteries, due to their low cost, high theoretical capacities and environmental friendliness. In this work, the SnTe nanosheets were fabricated by a simple hydrothermal method with changing the reaction time and reaction temperature. The X-ray diffraction data indicated that the as-prepared samples were composed by SnTe and Te, and the content of second phase Te decreased with increase of reaction time and reached the minimum at reaction time of 32 h. The electrochemical performance of SnTe was investigated by using aqueous lithium acetate solution (1 mol/L) as electrolyte. It was found that the variation trend of specific capacitance was opposite to the trend of Te content change with prolonging reaction time. The specific capacitance increased in the beginning and then became lower. As a result, the specific capacitance reached the maximum of 14.7 F/g.
Author: Xiong Zhang
Keywords: Sn-based compounds; hydrothermal; electrochemical; energy storage; specific capacitance