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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 11    No. 6    December 2001

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Effect of electroless plating nickel treatment on
electrode properties of Zr-based AB2 type alloy
WEN Ming-fen(文明芬)1, ZHAI Yu-chun(翟玉春)1,  CHEN Lian(陈 廉)2
TONG Min(佟  敏)2, ZHEN Hua(郑  华)2,  MA R

1. School of Materials and Metallurgy, Northeastern University,
Shenyang 110004, P.R.China;
2. Institute of Metal Research, Chinese Academy of Sciences,
Shenyang 110016, P.R.China

Abstract: An electroless plating nickel treatment was processed to improve the active behaviors and discharge capacities of Zr-based AB2 alloys. The effects of the nickel coating on the surface appearance, the structure of the alloy powders and the electrode characteristics were investigated. It is found that the Nirich layer formed through electroless plating nickel treatment plays an important role on the initial activation property and the discharge capacity of Zr-based alloy. The optimal content of electroless plating nickel is about 15%, and the discharge capacity of the electrode can be increased to 400mA·h·g-1 after 6 cycles. Although coated nickel is beneficial for quick activation and discharge capacity, excessive electroless plating nickel can result in a decreased discharge capacity.

 

Key words:  Zr-based AB2 alloy; electroless plating nickel; activation behavior; discharge capacity

ISSN 1672-7029
CN 43-1423/U

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