Transition-metal-based layered double hydroxides (LDHs) have attracted substantial attention as highly efficient oxygen evolution reaction (OER) catalysts because they are earth-abundant, low-cost, and environmentally friendly materials with favorable adsorption/desorption energies for intermittent reactants. However, the application of these LDHs high-performance electrocatalysts is often hind...

Due to their unique spatial structures, layered double hydroxides (LDHs) have been considered as prospective electrode materials for supercapacitors. In this work, several NiCo-LDH are obtained via a facile selenization process. This can improve the conductivity and reduce electrochemical impedance of samples. The 0.4Se-NiCo-LDH deliver specific capacitance 1396 F/g at 1 A/g. capacity retention...