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Citation: Deng Qing-Zhou, Chen De-Min, Yang Ke, Chen Lian, Li Bin-Hui, Zheng Sui-Sheng, Liu Shi, Tong Min, Li Yi-Yi. Modification of a Rapidly Solidifide AB₂ Type Hydrogen Storage Alloy by Ball-milling[J]. Acta Physico-Chimica Sinica, ;1999, 15(05): 420-425. doi: 10.3866/PKU.WHXB19990507 shu

Modification of a Rapidly Solidifide AB₂ Type Hydrogen Storage Alloy by Ball-milling

1.
Liaoning key Laboratory for Materials and Hydrogen,Institute of Metal Research,Chinese Acdemy of Sciences,Shenyang 110015

Received Date: 27 July 1998
Available Online: 15 May 1999

Zr0. 9Ti0. 1 (Ni0.57V0.1Mn0. 28Co0. 05 )2.1 alloy was prepared by melt-spinning and ball-milled with Co3Mo additive to improve its kinetic characteristics. It was shown that after 2 h milling the alloy exhibited a much improved activation performance as well as electrochemical capacity. Electrochemical impedance experiments also showed that ball-milling of the alloy with Co3Mo could improve the surface activity to a great extent. This can be attributed to the catalytic effect of Co3Mo, which had a much closer contact with the alloy powder after ball-milling, on hydrogen oxidation. However, long time milling could decrease the capacity gradually due to the further amorphization of the alloy. The experimental results also showed that the alloy ball-milled with electrochemically catalytic material such as Co3Mo exhibited a better activity than those milled without any additives or with a metal powder such as Cu acting only as a conductor.
- Metal-hydride electrodes,
- Negative electrode additives,
- Ball-milling treatment
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Modification of a Rapidly Solidifide AB₂ Type Hydrogen Storage Alloy by Ball-milling