Abstract
The phase structures and hydrogen absorption–desorption properties of Ti–V–Cr–Mn alloys were investigated. It is found that the increasing V content is effective for enhancing the hydrogen absorption capacity and flattening the hydrogen desorption plateau, while it depresses the hydrogen desorption plateau pressure. With the increase of V content, two phases of BCC and C14 Laves of the alloys transform into a single BCC phase. The maximum and effective hydrogen storage capacities among studied alloys are 3.98 and 2.51 wt.%, respectively, which open the hope to bring Ti–V-based alloy into the reach of practical application for onboard hydrogen storage systems in fuel cell powered vehicles.
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