Production and electrochemical characterization of MgNi alloys by molten salt electrolysis for Ni-MH batteries

Electrochemical impedance spectroscopy and potentiodynamic polarization measurements show that the controlling-step of the discharge process changed from a mixed rate-determining process at lower depth of discharge to a mass transfer controlled process at higher depth of discharge. The charge transfer resistance increases from 0.5 Ω to 23 Ω with increasing depth of discharge.