Electrochemical characteristics of titanium-based hydrogen storage alloys

Zirconium-substituted TiMn 2 -based hydrogen storage alloy electrodes were prepared and their electrochemical characteristics have been evaluated in 6 M aqueous KOH solution. The electrode characteristics of Ti 1− x Zr x Mn 1.6 Ni 0.4 ( x =0.1 and 0.2) alloys such as discharge capacity, high rate capability and cycle life were evaluated. The alloy Ti 0.9 Zr 0.1 Mn 1.6 Ni 0.4 was found to have higher capacity than Ti 0.8 Zr 0.2 Mn 1.6 Ni 0.4 alloy. The exchange current density was also higher for Ti 0.9 Zr 0.1 Mn 1.6 Ni 0.4 alloy.