Polystyrene-Templated Aerosol Synthesis of MoS2-Amorphous Carbon Composite with Open Macropores as Battery Electrode

Abstract

MoS2-amorphous carbon (MoS2-AC) composite microspheres with macroporous structure were fabricated by one-pot spray pyrolysis. Single- or few-layered MoS2 were uniformly dispersed and oriented in random directions in the amorphous carbon microsphere with macropores sizes between 50 and 90nm. The macroporous microspheres having a high contact area with liquid electrolyte exhibited overall superior Li- and Na-ion storage properties compared with those of the dense microspheres. After 250 charge/discharge cycles at a current density of 1.5Ag(-1), the discharge capacities of the MoS2-AC microspheres with dense and macroporous structures for Li-ion storage were 694 and 896mAhg(-1), respectively. In the case of Na-ion storage, discharge capacities of 336 and 425mAhg(-1) were achieved for the dense and macroporous microspheres, respectively, after 100 cycles at 0.3Ag(-1).