NickelMaghrebV1, France, Analysis, bibRecord, 000015

Effect of the discharge rate on the electrochemical properties of LaY2Ni9 hydrogen storage alloy

Identifieur interne : 000015 ( France/Analysis ); précédent : 000014; suivant : 000016

Effect of the discharge rate on the electrochemical properties of LaY2Ni9 hydrogen storage alloy

Auteurs : Yassine Ben Belgacem [Tunisie] ; Chokri Khaldi [Tunisie] ; Jilani Lamloumi [Tunisie] ; Hisasi Takenouti [France]

Source :

Journal of Alloys and Compounds [ 0925-8388 ] ; 2015-05.

RBID : Hal:hal-01112474

English descriptors

mix :
- Discharge rate, Electrochemical characterization methods, Kinetic and redox parameters, Nickel-metal hydride batteries.

Abstract

In this study, the LaY2Ni9 hydrogen storage alloy is prepared and the effect of the discharge rate on theelectrochemical properties of the active material is investigated.The decrease of the discharge rate, firstly, facilitates the activation of the alloy, and other hand, causesthe decrease of the potential difference between charging and discharging that can be correlated withboth the maximum discharge capacity and the cycle number of activation. After activation, the electrochemicaldischarge capacity undergoes a rapid decay before slowing down during a long cycling. A goodstability and cycling lifetime are observed for C/10 rate.The exchange current density at initial activation cycles increases as a function of the electrochemicalcycling. The smaller the discharge rate is, the faster this growth is. The Nernst potential during the initialactivation cycles for all discharge rates shifts toward more positive direction. For a long cycling andexcept of the C/20 rate, an oscillating stabilization of both the exchange current density and Nernstpotential are observed, and the C/10 rate exhibits the best behavior, in good agreement with the goodmaintaining of performance.

Url:

https://hal.archives-ouvertes.fr/hal-01112474

DOI: 10.1016/j.jallcom.2015.01.074

Affiliations:

Links toward previous steps (curation, corpus...)

to stream Hal, to step Corpus: 000004
to stream Hal, to step Curation: 000004
to stream Hal, to step Checkpoint: 000005
to stream Main, to step Merge: 000039
to stream Main, to step Curation: 000039
to stream Main, to step Exploration: 000039
to stream France, to step Extraction: 000015

Links to Exploration step

Hal:hal-01112474

Le document en format XML

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<front><div type="abstract" xml:lang="en">In this study, the LaY2Ni9 hydrogen storage alloy is prepared and the effect of the discharge rate on theelectrochemical properties of the active material is investigated.The decrease of the discharge rate, firstly, facilitates the activation of the alloy, and other hand, causesthe decrease of the potential difference between charging and discharging that can be correlated withboth the maximum discharge capacity and the cycle number of activation. After activation, the electrochemicaldischarge capacity undergoes a rapid decay before slowing down during a long cycling. A goodstability and cycling lifetime are observed for C/10 rate.The exchange current density at initial activation cycles increases as a function of the electrochemicalcycling. The smaller the discharge rate is, the faster this growth is. The Nernst potential during the initialactivation cycles for all discharge rates shifts toward more positive direction. For a long cycling andexcept of the C/20 rate, an oscillating stabilization of both the exchange current density and Nernstpotential are observed, and the C/10 rate exhibits the best behavior, in good agreement with the goodmaintaining of performance.</div>
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Effect of the discharge rate on the electrochemical properties of LaY2Ni9 hydrogen storage alloy

Effect of the discharge rate on the electrochemical properties of LaY2Ni9 hydrogen storage alloy

Source :

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri