Effects of surface treatments of MINi_4.0Co_0.6Al_0.4 hydrogen storage alloy on the activation, charge/discharge cycle and degradation of Ni/MH batteries

摘要

The effects of the surface treatment of the hydrogen storage alloy on the activation property and cycle life of nickel/Metal-hydride (Ni/ MH) batteries were investigated by means of the electrochemical impedance spectra. It was found that the oxide layer on the alloy surface Affected its electrochemical properties and catalysis for the oxygen combination.