Performance evaluation of LaNi4.7Al0.3 and LaNi5 electrodes used as anodes in nickel metal hydride secondary batteries by analysis of current transients

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The performance of LaNi4.7Al0.3 and LaNi5 porous electrodes used as anodes in nickel/metal hydride secondary batteries has been evaluated by analysis of current decay transients. From the measured three-staged current decay transients for the hydrogen transport through both electrodes in the coexistence of two hydride phases, the discharge capacity and beta- to alpha-phase transition time were determined. The optimum charging condition and velocity of alpha/beta phase boundary movement are discussed with respect to the experimentally obtained discharge capacity and transition time. The potentiostatic current decay transient technique is more conveniently employed to establish the optimum charging condition, as compared with the usual galvanostatic charge-discharge technique.
Publisher
ELSEVIER SCIENCE SA LAUSANNE
Issue Date
1997-03
Language
English
Article Type
Article; Proceedings Paper
Keywords

ALLOYS

Citation

JOURNAL OF POWER SOURCES, v.65, no.1-2, pp.9 - 13

ISSN
0378-7753
DOI
10.1016/S0378-7753(96)02647-X
URI
http://hdl.handle.net/10203/69709
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