Study of particle size on the electrochemical activity of LaNi5 based negative electrodes.

Abstract

Electrochemical activation process of nano and submicro LaNi_3,8Co_0,5Mn_0.4Al_0.3 materials in KOH 6 M solution were studied by cyclic voltammetry. The obtained results show that the materials have been activated after 20 CV cycles. Electrochemical parameters such as E₀, R_p, J₀, Q_n, Q_p, b_c, b_a have been modified together with the particle dimention. The best electrochemical activation arived at 200 nm particles materials.