Metal hydride electrodes based on solid solution type alloy TiV3Nix (0 ≦ x ≦ 0.75)

Effects of Ni on the structural and electrochemical properties of Ti–V-based hydrogen storage alloys

“…It has been reported that Ni can decrease the oxidation of Ti and V [14], which are the main hydrogen storage elements in the alloy. Also, the degradation of the V-based solid solution alloy is usually due to a loss of electrocatalytic activity [15]. Thus it is reasonable to assume that a small excess of Ni may also slow down the loss of electrocatalytic activity and thus slow down the degradation of V-based phase, which is believed to be the main hydrogen-absorbing phase in the Ti-V-based alloys.…”

Electrochemical Properties of Nb-Substituted Zr-Ti-Ni Hydrogen Storage Alloy Negative Electrodes for Nickel-Metal Hydride Batteries

“…In particular, R 4 for the alloy with x = 0.05 was much smaller than that with x = 0. The abundance of the TiNi phase is known to improve electrical conductivity [32]; so, in this study, the abundance of the Ti 0.6 Zr 0.4 Ni secondary phase also seems to improve the electrical conductivity. Consequently, the alloys with higher Nb contents will improve HRD at the lower temperature.…”

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

“…A temperature about 800 K is necessary for the full release of the absorbed hydrogen from the mono-hydride at 0.1 MPa, which implies that the mono-hydride phase is rather stable in a gas-solid reaction. In our previous study, the second hydrogen desorption plateau for the alloy at 353 K cannot be observed in a gassolid reaction even evacuated to 0:003 MPa [14]. Thus, the fact that two discharge plateau presented in the ÿrst discharge curves of Ti-30V-15Cr-15Mn alloy at 353 K suggests that hydrogen releases from the mono-hydride phase in an alkaline electrolyte is easier than in a gas-solid reaction.…”