Abstract
The present work provides a preliminary study of our neutron diffraction analysis on the Ti 2Ni hydrogen storage alloy electrode. The discharge behavior of Ti 2Ni alloy electrodes in 6 M KOH aqueous solution was observed to be very different from that found in 6 M KOH deuterium oxide solution. An a.c. impedance technique was therefore applied to investigate the frequency response during the charge/discharge process of the electrode in each solution. The impedance spectra obtained revealed an apparent variation of reaction resistance of the electrode discharged in 6 M KOH+H 2O and in 6 M KOH+D 2O, indicating a significant variation of electrode charge/discharge kinetics. The present work provides a further understanding of the charge/discharge kinetics of Ti 2Ni electrode in heavy water thus supplementing the neutron diffraction studies of the electrochemical hydrogen storage behavior of Ti 2Ni intermetallic compound.
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