Studies on electrochemical hydrogen storage in MmNi5-xMx multicomponent alloys: A review
Por:
Sebastian, P.J., Gamboa, S.A.
Publicada:
1 ene 2001
Resumen:
Nimetal hydride (NMH) batteries, like Liion batteries, are considered as po-tential energy storage devices for portable applications. The most commonly used materials for the MH electrode so far are AB2 (Mg-Ni) and AB5 (La-Ni) type alloys. The Ni/MH battery as an electrochemical system is defined by its specific capacity, cycle lifetime, but principally by the exchange current density, equilibrium potential, dischargeability and self-discharge mechanisms. All of those electrochemical parameters permit that a specific electrochemical process takes place for absorbing/desorbing hydrogen in the bulk of the alloy. However, more research is in progress for improving the performance characteristics of the cell for a longer cycling lifetime, minimizing self-discharge and operation of the cell above 50°C. © 2001, CI and CEQ. All rights reserved.
Filiaciones:
Sebastian, P.J.:
Energy Research Center, UNAM, Temixco, Morelos, Mexico
Gamboa, S.A.:
Energy Research Center, UNAM, Temixco, Morelos, Mexico
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