Metal Sulfides and Phosphides for Supercapacitors

Photothermic Energy Harvesting in Reduced Graphene Oxide Nanosheets Intercalated with Vanadium Nitride as Pseudocapacitive Electrode

“…Pseudocapacitance arises from Faradaic redox reactions (not limited by solid-state diffusion and cognate with high rate capability and diffusion length) occurring at the nanoscale electrode surface . Conventional transition pseudocapacitive materials (oxides/sulfides/phosphides) possess a narrow potential window fostering high energy and power densities by means of mass, heat, and charge transfer with phase transitions. , These materials are exorbitant in terms of availability and exhibit profuse oxidation states at different potentials with elevated conductivity, promoted by the crystal lattice for efficient charge transport. However, oxide/hydroxide composites retain (i) a low power density caused by limited electrical conductivity, restricting the electron transfer rates, and (ii) poor cyclability attributed to morphological deterioration during cycling, such as particle swelling and agglomeration.…”