Electrochemical performance of ball-milled Ti–V-based electrode alloy

The effect of ball-milling on the electrochemical performance of Ti–30V–15Cr–15Mn alloy has been investigated. It was found that the ball-milling is effective in improvement of the discharge capacity of this alloy, due to the reduction in the particle size. The discharge capacity increases from 30 mAh g−1 of the as-cast sample to 198 mAh g−1 of the 30 min ball-milled sample at room temperature. A maximum discharge capacity of 710 mAh g−1 is obtained for the 3 h ball-milled Ti–30V–15Cr–15Mn alloy at discharge current of 10 mA g−1 in 6 M KOH solution at 353 K. The appearance of the two discharge plateaus on the discharge curves of the alloy is related to its multi-phase hydride formation.