The main cause of discharge capacity decrease was the impedance of metal surface increased due to cell reaction.

These superior performances can be attributed to the higher reaction activity, lower electrochemical impedance and higher oxygen evolution potential for the nanostructured nickel hydroxide electrodes.

In this paper, the expressions of the input impedance for a probe type coaxial line-rectangular waveguide transducer are derived by means of self-reaction of an assumed current over the probe.