Electrochemical Hydrogen-Storage in Ti–Mn Alloy Electrodes

Abstract

The structure of new hydrogen storage electrodes, consisting of TiMn _x (x=0.5∼1.75) and a binder, and their electrochemical properties are described. Powdered Ti–Mn alloys were sintered with Ni powder used as a binder. When the electrode potential is higher than –1.075 V vs. Ag/AgCl, Ni is inactive and does not take part in the electrode reaction. The electrodes can be activated by repeating about 10 cycles of cathodic and anodic elecrolysis. The amount of absorbed hydrogen increases with decrease of Mn content. Because of the large current capacity, Ti–Mn promises to be an excellent elecrode for a battery with high energy density.