Electrochemical performance of TiVNi-Quasicrystal and AB3-Type hydrogen storage alloy composite materials

✍ Scribed by Wanqiang Liu; Xinlu Wang; Wen Hu; Yoshiteru Kawabe; Masaharu Watada; Limin Wang

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 498 KB
• Volume: 36
• Category: Article
• ISSN: 0360-3199
• DOI: 10.1016/j.ijhydene.2010.10.017

✦ Synopsis

The Ti 1.4 V 0.6 Ni ribbon alloy and AB 3 -type (La 0.65 Nd 0.12 Mg 0.23 Ni 2.9 Al 0.1 ) alloy ingot are prepared by melt-spinning technique and induction levitation melting technique, respectively. The Ti 1.4 V 0.6 Ni þ 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 2 Ni, 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 1.4 V 0.6 Ni and AB 3 composite holds better high-rate discharge ability than that of Ti 1.4 V 0.6 Ni.