In the present investigation, AB(5)-type hydrogen storage alloys with compositions Mm(0.8)La(0.2)Ni(3.7)Al(0.38) Co0.3Mn0.5Mo0.02 and Mm(0.75)Ti(0.05)La(0.2)Ni(3.7)Al(0.38)Co(0.3)Mn(0.5)Mo(0.02) are synthesized by radio-frequency induction melting. The electrochemical properties are studied through the measurements of discharge capacity, activation process, rate capability, self-discharge rate and cyclic stability of both the electrodes. Pressure-composition isotherms are plotted by converting the electrode potential into the hydrogen pressure following the Nernst equation. The structural and microstructural characterizations are performed by means of X-ray diffraction phase analysis and scanning electron microscopy of as-fabricated and electrochemically tested electrodes. An attempt is made to correlate the observed electrochemical properties with the structural-microstructural characteristics. (c) 2009 Elsevier B.V. All rights reserved.