Abstract
In some conditions, the multi-phase composition of the hydrogen storage electrode alloy can be reflected on its discharge curve. In this paper, the discharge curves of the Ti–Ni-based hydrogen storage alloys have be analyzed using electrochemical techniques and XRD. We concluded that the appearance of the two discharge plateaus on the discharge curves of the Ti 0.5Al 0.25Ni 0.25 alloy and Ti 3Ni 1.7M 0.3 (M=Ni, Al, Co, Cr) alloys is related to their multi-phase composition and multi-phase hydride formation. The appearance of the first fastigiated plateau is the result of together releasing hydrogen of TiNi and Ti 2Ni phases. The secondary flat plateau represents releasing hydrogen process of only the Ti 2Ni phase.
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