Application Explorations Of Polyanthraquinone-Based Materials And MoS₂ Nanosheets In Electrochemical Energy Storage

Electrochemical energy storage plays an important part in solving future energy and environment problems. Supercapacitor and lithium ion battery are two important electrochemical energy storage devices. This paper includes two main studies that the author conducted in the areas of supercapacitor and lithium ion battery.In the first study, a series of Ketjenblack(KB) carbon nanoparticles supported polyanthraquinone(PAQ) materials(KB-PAQ) was prepared and evaluated as the pseudocapacitor electrode material in non-aqueous electrolyte. Experiments showed that these composite electrodes exhibit largely improved specific capacitance and cycling stability. In addition, when paired with graphene electrodes in asymmetric supercapacitors, our composite electrodes demonstrate significant energy density up to 45.5 Wh/kg and power density up to 21.4 kW/kg.In the second study, we prepared a 3D column-like MoS2 superstructure composed of edge-terminated MoS2 nanosheets(CLET MoS2). This new MoS2 material delivers a high specific capacity of around 840 mAh/g, superior cycling durability up to 500 cycles, and excellent rate performance for lithium-ion batteries.