Transition metal chalcogenide and phosphates :an efficient material for energy conversion and storage

Abstract

In the growing economy has always a high demand for energy. Gross total energy demand and per capita energy consumption are taken as proxies to estimate the number of living standards and the advancement of a nation. But till now fossil fuels are feeding our energy demand. Due to their non-renewable nature, they pose a severe threat to their over-dependence. Moreover, global warming and the rising level of different pollutants are caused due to the combustion of these hydro-carbon sources. Atomic reactors have a history of catastrophic disasters. Solar and wind energy, at this stage are not capable of providing high power in a continuous manner irrespective of the time of the day or weather conditions. Transition metal chalcogenides due to their enormous surface area, high chemical and structural stability have risen as a suitable material for supercapacitors application. Their high earth abundance and possession of multiple oxidation states have resulted in various publication based on their composites with carbonaceous materials. In this report we have discussed the synthesis of wet chemical synthesis protocol for the scalable synthesis of borophene and its composite with the transition metal chalcogenides. The synergy among these two layered materials facilitates the charge storing efficiency of the device. This strategy could be scale up for development of future energy storage systems. The overpotential can directly reflect the energy efficiency and HER activity of the electrolyzer, and it is the most significant parameter to evaluate the concert of electrodes. Due to the higher strength, wettability, and better corrosion resistance. The optimized Ni-Mo2S3/rGO sample exhibited excellent catalytic activity and increased stability, manifesting in an overpotential of only 290 mV for the HER (10 mA cm−2) in 0.5 M H2SO4. The Ni-Mo2S3/rGO catalytic process shows that the as-prepared catalyst is an excellent material for the HER. one pot hydrothermal method for the synthesis of MoS2/PEDOT (poly (3,4-ethylenedioxythiophene) nano composite. Poly (3,4-ethylenedioxythiophene) is a polythiophene based conjugated polymer, can further enhance the electrical conductivity of MoS2 that is well reflected in the electrochemical performance of the composite. Mn-HPO/RGO derived from Mn-HPO. It having a micro-rod morphology Mn-HPO@RGO-10 provided a specific capacitance value of 883 F g-1 at 1 A g-1 current density in the 1 V potential window and showed a specific capacitance retention of 83% after 10000 GCD cycles, rate capability 51% in the three-electrode systemalong with maximum specific energy (115 Wh/kg) and power density (1153 W/kg), respectively.The MXene//Mn-HPO@RGO-10 ASC device provided a specific capacitance value of 500 F g-1 at the mass normalized current density of 0.4 A g-1. This device maintained a maximum energy density of 24 Wh kg-1 and a power density of 3200 W kg-1. The specific capacitance and coulombic efficiency of the device were evaluated to be 83% and 96%, respectively, after 12000 consecutive galvanostatic charge– discharge cycles