Influence of Different Electrolyte Concentrations on the Performance of an AB2-Type Alloy

Abstract

A systematic study about the effect of different electrolyte concentrations (KOH2M, 4M,6M and 8M) at 293K on the electrochemical properties of Ti12Zr21.5V10Ni38.4Cr4.5Mn13.6 AB2-type alloy was performed. This alloy can be used as active material of the negative electrode of nickel-metal hydride batteries. The variation in KOH concentration has influence in the activation processes, the discharge capacity and the cycle life of the AB2 alloy. The maximum discharge capacity and the faster activation are reached at KOH 8M, whereas the better cycle life performance is achieved to KOH 4M. These are innovative results because previous research has not explicitly considered the type and composition of the studied alloy.