Ultrasonic Casting Process Optimization of Vanadium-based Hydrogen Storage Alloy

Ultrasonic casting of V₃Ti_0.56Cr_0.1Mo_0.1 vanadium-based hydrogen storage alloys was carried out at different ultrasonic vibration frequencies and pouring temperatures,and the hydrogen storage property and electrochemical cycling stability of the samples were tested and analyzed.The results show that compared with 95 Hz,ultrasonic vibration frequency at 55 Hz can increase the maximum hydrogen absorption of the sample by 65% and reduce the decay rate of discharge capacity by 61%.Compared with 1 830 ℃,pouring temperature at1 920 ℃ can increase the maximum hydrogen absorption of the sample by 71% and reduce the decay rate of discharge capacity by 63%.Both of the hydrogen storage property and electrochemical cycling stability of the samples first increase and then decline with increase of ultrasonic vibration frequency and pouring temperature.The optimized ultrasonic vibration frequency and pouring temperature of V₃Ti_0.56Cr_0.1Mo_0.1 vanadium-based hydrogen storage alloy are 55 Hz and 1 920 ℃,respectively.