Exfoliated transition metal dichalcogenide nanosheets for supercapacitor and sodium ion battery applications

Growing concerns regarding the safety, flammability, and hazards posed by Li-ion systems have led to research on alternative rechargeable metal-ion electrochemical storage technologies. Among the most notable of these are Na-ion supercapacitors and batteries, motivated in part because of the similar size and electrochemistry of Li and Na ions. However, sodium ion batteries (SIBs) come with their own set of issues, especially the large size of the Na+ ion, its relatively sluggish kinetics and low energy densities. This makes the development of novel materials and appropriate electrode architecture is of absolute significance. Transition metal dichalcogenides (TMDs), in this regard have attracted a lot of attention due of their relative ease of exfoliation, diverse morphologies and architectures with superior electronic properties. Here, we study the electrochemical performance of Mo based two dimensional (2D) layered TMDs (e.g. MoS2, MoSe2, and MoTe2), exfoliated in a superacid, for batt...