Higher energy density of MoSe<sub>2</sub>/polyaniline capsule nanospheres for enhanced performance supercapacitor
Huimin Zhang, Geping He, Donghao Zheng, Huijun HuangFu, Yanxia Li, Yuanmei Mi, Minye Wu, Hudie Yuan
Abstract
Abstract It is very important to develop novel nanocomposites as electrode materials for supercapacitors (SCs). MoSe 2 porous nanospheres were prepared by one-step hydrothermal method, and polyaniline (PANI) nanosheets were grown in situ to obtain MoSe 2 /PANI capsule nanospheres (CNs). By changing the amount of aniline, it was found that MoSe 2 /PANI-16 CNs had the best electrochemical performance, and a high specific capacitance of 753.2 F g −1 was obtained at a current density of 1 A g −1 . In addition, the interface electron transport path was clarified that a C–Mo–Se bridge bonds may be formed for rapid electron transfer. The reaction kinetics was also explored. The large specific surface areas of MoSe 2 /PANI CNs provided more reactive sites, so that the contribution of pseudocapacitance was much larger than diffusion capacitance. The assembled MoSe 2 /PANI//activated carbon asymmetric supercapacitor has a energy density of 20.1 Wh kg −1 at a power density of 650 W kg −1 . These results indicate that the MoSe 2 /PANI CNs are a promising electrode material.