Towata S.-I.,Toyota RandD Labs. Inc. |
Noritake T.,Toyota RandD Labs. Inc. |
Itoh A.,Toyota RandD Labs. Inc. |
Aoki M.,Toyota RandD Labs. Inc. |
Miwa K.,Toyota RandD Labs. Inc.
Journal of Alloys and Compounds | Year: 2013
The effect of partial substitution with niobium and iron in Ti 25Cr50V25 hydrogen storage alloys on the short term cycle durability during hydrogen absorption and desorption is investigated. The substitution of 1 at% iron improved the cycle durability, although the hydrogen storage capacity decreased. In contrast, partial substitution by niobium was effective in improving the cycle durability while maintaining the hydrogen storage capacity. For up to 8 at% niobium substitution, the alloys showed a single bcc phase and better cycle durability than the Ti 25Cr50V25 alloy. This study showed that a niobium substitution of 5 at% is preferable for highly effective hydrogen storage capacity and cycle durability. © 2013 Elsevier B.V. All rights reserved.