ACTIVATION OF HYDROGEN-STORAGE ELECTRODE ALLOY Ml(Ni,Co,Mn,Ti)_5 PRODUCED BY GAS ATOMIZATION
气体雾化贮氢电极合金Ml（Ni,Co,Mn,Ti）5的活化性能

The electrochemical activation behaviours of the hydrogenstorage electrode alloys Ml(Ni,Co,Mn,Ti)5 produced by induction melting and then fornace cooling (FC) or Ar-gas atomizing (AGA) have been studied by comparing the activation of AGA electrodes aged at room temperature for 4 months with that of FC electrode. It is found that the surface oxide is only a minor factor to affect the activation, while the magnitude of internal energy change in the alloy before and after hydrogenation is the controlling factor. The increases in the internal energy of the alloy, caused by oxide and the H-atoms entering tetrahedral or octahedral sites during hydrogenation, make the activation difficult.