Alloys Anode active materials Batteries Charge transfer Charge transfer resistance Concentration levels Diffraction patterns Diffusion Dynamic response Electric discharges Electrochemical impedance spectroscopy Electrodes Exchange current densities Hydrides Hydrogen Hydrogen diffusion coefficients Hydrogen storage Impedance spectrum Manganese Metal hydrides Molybdenum Nickel metal hydride batteries Physicochemical model Solar cells Spectroscopy Spectrum analysis X ray diffraction