Electrochemical performance of TiVNi-Quasicrystal and AB 3-Type hydrogen storage alloy composite materials

• Published in: International journal of hydrogen energy Vol. 36; no. 1; pp. 616 - 620
• Main Authors: Liu, Wanqiang, Wang, Xinlu, Hu, Wen, Kawabe, Yoshiteru, Watada, Masaharu, Wang, Limin
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 2011
• Subjects: AB 3-type alloy; Electrochemical performance; Hydrogen storage; Icosahedral quasicrystal; Ti 1.4V 0.6Ni alloy; Ti 1.4V 0.6Ni alloy; Electrochemical performance; Hydrogen storage; Icosahedral quasicrystal; AB 3-type alloy
• ISSN: 0360-3199; 1879-3487
• DOI: 10.1016/j.ijhydene.2010.10.017

The Ti 1.4V 0.6Ni ribbon alloy and AB 3-type (La 0.65Nd 0.12Mg 0.23Ni 2.9Al 0.1) alloy ingot are prepared by melt-spinning technique and induction levitation melting technique, respectively. The Ti 1.4V 0.6Ni + 20 wt.% AB 3 mixture powders are synthesized by ball-milling the above prepared alloy ingots, and their structures and the electrochemical hydrogen storage properties are investigated. It is found that the icosahedral quasicrystal, Ti 2Ni, BCC structural solid solution and AB 3-type phases are all presented in the composite material. The maximum electrochemical discharge capacity of the composite electrode is 294.7 mAh/g at the discharge current density of 30 mA/g and 303 K. In addition, the electrode made of Ti 1.4V 0.6Ni and AB 3 composite holds better high-rate discharge ability than that of Ti 1.4V 0.6Ni. ► Ti 1.4V 0.6Ni + AB 3 alloy is composed of the I-phase, Ti 2Ni, BCC and AB 3-type phases. ► The maximum electrochemical discharge capacity reaches 294.7 mAh/g. ► The electrode holds better high-rate discharge ability than that of Ti 1.4V 0.6Ni. ► AB 3-alloy additive play synergistic effect in electrochemical reaction kinetics.