NickelMaghrebV1, Main, Exploration, bibRecord, 000007

The electrochemical performance of AB3-type hydrogen storage alloy as anode material for the nickel metal hydride accumulators

Identifieur interne : 000007 ( Main/Exploration ); précédent : 000006; suivant : 000008

The electrochemical performance of AB3-type hydrogen storage alloy as anode material for the nickel metal hydride accumulators

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

Source :

Journal of Solid State Electrochemistry [ 1432-8488 ] ; 2016.

RBID : Hal:hal-01334909

English descriptors

mix :
- activation energy, enthalpy and entropy formation, high-rate discharge ability, hydrogen reactions, Electrochemical properties.

Abstract

For the purpose of lowering the cost of metal hydride electrode, the La of LaY2Ni9 electrode was replaced by Ce. The electrochemical performances of the CeY2Ni9 negative electrode, at a room and different temperatures, were compared with the parent alloy LaY2Ni9. At room temperature during a long cycling, the evolution of the electrochemical capacity—the diffusivity indicator (DH/a2 )—the exchange current density, and the equilibrium potential were determined. At different temperatures, the electrochemical characterization of this alloy allowed the estimation of the enthalpy, the entropy, and the activation energy of the hydride formation. The evolution of the high-rate dischargeability was also evaluated at different temperatures. Compared with the parent LaY2Ni9 alloy, CeY2Ni9 exhibits an easy activation and good reaction reversibility. This alloy also conserves a good lifetime during a long-term cycling. A lower activation energy determined for this alloy corresponds to an easy absorption of hydrogen into thisnew alloy.

Url:

http://hal.upmc.fr/hal-01334909

DOI: 10.1007/s10008-016-3198-3

Affiliations:

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

to stream Hal, to step Corpus: 000023
to stream Hal, to step Curation: 000023
to stream Hal, to step Checkpoint: 000000
to stream Main, to step Merge: 000007
to stream Main, to step Curation: 000007

Le document en format XML

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<front><div type="abstract" xml:lang="en">For the purpose of lowering the cost of metal hydride electrode, the La of LaY2Ni9 electrode was replaced by Ce. The electrochemical performances of the CeY2Ni9 negative electrode, at a room and different temperatures, were compared with the parent alloy LaY2Ni9. At room temperature during a long cycling, the evolution of the electrochemical capacity—the diffusivity indicator (DH/a2 )—the exchange current density, and the equilibrium potential were determined. At different temperatures, the electrochemical characterization of this alloy allowed the estimation of the enthalpy, the entropy, and the activation energy of the hydride formation. The evolution of the high-rate dischargeability was also evaluated at different temperatures. Compared with the parent LaY2Ni9 alloy, CeY2Ni9 exhibits an easy activation and good reaction reversibility. This alloy also conserves a good lifetime during a long-term cycling. A lower activation energy determined for this alloy corresponds to an easy absorption of hydrogen into thisnew alloy.</div>
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The electrochemical performance of AB3-type hydrogen storage alloy as anode material for the nickel metal hydride accumulators

The electrochemical performance of AB3-type hydrogen storage alloy as anode material for the nickel metal hydride accumulators

Source :

English descriptors

Abstract

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

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri