AB5 type hydrogen storage alloy for use in rechargeable electrochemical cells and method for producing the same

摘要

An AB5-type hydrogen absorbing alloy composition for use in an electrochemical cell includes between about 0.001 and 0.01 mole percent of zirconium and/or titanium dispersed throughout the alloy. Methods of producing the alloy are also disclosed. The levels of these elements have been selected to maintain low hydrogen equilibrium pressure, high capacity, and acceptable activation characteristics, along with improved storage characteristics and improved cycle life from reduced corrosion.