Risks and ethics of nanotechnology: an overview

Construction of Nickel Molybdenum Sulfide/Black Phosphorous 3D Hierarchical Structure Toward High Performance Supercapacitor Electrodes

“…The reversible redox characteristics of Ni 2+ /Ni 3+ /Mo 2+ /Mo 6+ resulted in a pair of Faradaic redox peaks throughout the potential range of −0.2 to −1 V for pristine NMS electrode, whereas the NMS/BP electrode showed the enhanced potential window of −1 to 0 V, along with the improved current response. Redox peaks were attributed to interactions between electrodes and electrolytes, with postulated processes as follows: [18,[48][49][50] NiMo 3 S 4 + xK + + xe − ↔ K x − NiMo 3 S 4 (6) Figure 5d illustrates that the recorded CV curves resemble quasi-rectangular forms. As the sweep rate increases from 5 to 100 mV s −1 , the CV curves remain consistent, proving that the NMS/BP hybrid electrode influences rapid charge-transfer dynamics.…”

“…A device that implements a different mechanism, containing a faradic-type electron transfer interaction between the electrode/electrolyte interface, is termed a pseudocapacitive (PC) or redox type supercapacitor. [5,6] The specific problems include low power density in batteries and low energy density in SCs. Hybrid supercapacitors belong to a distinctive category of devices that jointly rely on the electrostatic and electrochemical phenomena; that is, they have two types of working electrodes: one is capacitive and the other is battery-type.…”