Journal of Material Sciences & Engineering

Marwa Ayari

Publications

• Research Article
  Electrochemical Study of the Hydrogenation of LaZr₂Cr₄Ni₅-Based Alloys
  Author(s): Ines Sahli, Mouna Elghali, Marwa Ayari, Ouassim Ghodbane and Mohieddine AbdellaouiInes Sahli, Mouna Elghali, Marwa Ayari, Ouassim Ghodbane and Mohieddine Abdellaoui
  
  The electrochemical behavior of LaZr2Cr4Ni5-based alloys applied as negative electrode materials for Ni–metal hydride (Ni–MH) batteries was investigated by cyclic voltammetry (CV), chronoamperometry and electrochemical impedance spectroscopy (EIS) techniques. The hydrogen diffusion coefficient, determined by CV, was equal to 1.28 × 10−8 cm2s−1 reflecting an appropriate electrochemical hydrogenation kinetic of the LaZr2Cr4Ni5-based compound. The evolution of the hydrogen diffusion coefficient was also investigated by EIS first at different state of charge (10% and 100%) and second as function of charge/discharge cycling. Upon the first cycle, the diffusion coefficient increases from 31.72 × 10-8 cm2s-1 to reach a maximum v.. Read More»
  

  Abstract PDF