Effect of Preparation Method on the Electrochemical Performances of Vanadium-titanium Hydrogen Storage Alloy

For improving the electrochemical performances of vanadium-titanium hydrogen storage alloy,vanadium-titanium hydrogen storage alloys were prepared by various casting processes,and the electrochemical corrosion resistance and electrochemical cycling stability were tested and analyzed. The results show that compared with the optimized process of conventional casting,ultrasonic casting process can make the corrosion potential of the sample positively shift by 0. 125 V and the discharge capacity decay rate decrease by 29 %,respectively.Both the electrochemical corrosion resistance and electrochemical cycling stability of the alloy were greatly improved. The vanadium-titanium hydrogen storage alloy was optimized by ultrasonic casting process.