Influence of Ce and Nd contents of Ml(NiCoMnAl) 5 alloy on the performances of Ni–MH batteries

The influence of the Ce and Nd contents of Ml(NiCoMnAl) 5 alloy on the performances of Ni–MH batteries was studied. It was found that the high rate dischargeability increased with increase of the Ce content and decrease of the Nd content, while charge retention decreased. An increase in the Ce and N...

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Bibliographic Details
Published in:Journal of alloys and compounds 1999-12, Vol.293, p.821-824
Main Authors: Guo, J.H, Jiang, Z.T, Duan, Q.S, Liu, G.Z, Zhang, J.H, Xia, C.M, Guo, S.Y
Format: Article
Language:English
Subjects:
AB 5 alloy
Ce and Nd contents
Cycle life
Discharge capacity
Ni–MH battery
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Summary:The influence of the Ce and Nd contents of Ml(NiCoMnAl) 5 alloy on the performances of Ni–MH batteries was studied. It was found that the high rate dischargeability increased with increase of the Ce content and decrease of the Nd content, while charge retention decreased. An increase in the Ce and Nd contents improved the Ni–MH battery cycle life, and increase of the Nd content increased the discharge capacity of the MH electrode. XRD and PCI analysis showed that heat treatment made the chemical composition of the hydrogen storage alloy more homogeneous with lower lattice strain, and the hydrogen desorption plateau was smooth, which obviously improved the Ni–MH battery cycle life.
ISSN:0925-8388
1873-4669
DOI:10.1016/S0925-8388(99)00364-3