A HIGH-CAPABILITY AND HIGH-PERFORMANCE HRDROGEN STORAGE ALLOY FOR SECONDARY BATTERY ELECTRODE WHICH CONTAINS ZIRCONIUM

摘要

PURPOSE: A Zr hydrogen storage alloy for secondary battery electrode is provided to have high discharge capacity and high efficiency discharge ability suitable as cathode active material of Ni-MH battery. CONSTITUTION: The Zr hydrogen storage alloy suitable as cathode active material of Ni-MH(nickel-metal hydride) battery having excellent discharge capacity of about 300-400mAh/g and high efficiency discharge such as rate capability of 80% or more based on the value at the discharge current density of 25mA/g is defined by formula I, that is, Zr(1-x)Tix(MnuVvNiy)z (wherein X, U, V, Y and Z are each atom portions of alloy forming elements; 0