Aluminum|cobalt co|substituted %α%|Ni(OH)-2 was prepared by means of the titration method in a buffer solution,the structure was characterized by XRD analysis. With above mentioned %α%|Ni(OH)-2 as the positive electrode of a nickel|metal hydride cell,the discharge performances were examined by constant|current charge|discharge experiments. In comparison with the electrodes made of aluminum substituted or cobalt substituted Ni(OH)-2 materials,the aluminum|cobalt co|substituted composite electrodes possess an excellent electrochemical performance and are of practical significance. Aluminum | cobalt co substituted % α % | Ni (OH) - 2 was prepared by means of the titration method in a buffer solution, the structure was characterized by XRD analysis. With above mentioned % α % | Ni (OH) - 2 as the positive electrode of a nickel | metal hydride cell, the discharge show were examined by constant | current charge | experiments. In contrast with the electrodes made of aluminum substituted or cobalt substituted Ni (OH) - 2 materials, the aluminum | cobalt co | substituted composite electrodes possess an excellent electrochemical performance and are of practical significance.