Abstract
Amorphous Ti 3Ni 2 (Ti 2Ni/TiNi) alloy has been prepared by mechanical milling of crystalline Ti 3Ni 2 alloy, and its electrochemical properties were investigated. The results of charge and discharge test show that the amorphous Ti 3Ni 2 alloy can resolve the problem of extremely short cycle life of crystalline Ti 3Ni 2 alloy at high temperature (333 K). The capacity retention rate of amorphous Ti 3Ni 2 alloy is greatly increased to 88.83% at 333 K compared with the retention rate of its crystalline counterpart 39.47% after 19 cycles. Based on analysis of Tafel polarization, linear polarization, and electrochemical impedance spectroscopy, it is found that the major reason for the improvement is the presence of amorphous Ti 3Ni 2 alloy, which has much better corrosion resistance compared with its crystalline counterpart.
| Original language | English |
|---|---|
| Pages (from-to) | 1511-1515 |
| Number of pages | 5 |
| Journal | Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering |
| Volume | 41 |
| Issue number | 9 |
| State | Published - Sep 2012 |
Keywords
- Amorphous
- Electrochemical properties
- Hydrogen storage alloy
- Ni/MH battery
- Ti Ni alloy