Determination of Transport and Electrochemical Kinetic Parameters of Bare and Copper-Coated LaNi 4.27 Sn 0.24 Electrodes in Alkaline Solution

摘要: Electrochemical properties of bare and copper-coated LaNi{sub 4.27}Sn{sub 0.24} electrodes were investigated in alkaline solution. The exchange current density, polarization resistance, equilibrium potential determined as functions the state charge electrodes. symmetry factors for estimated to be 0.53 0.52, respectively. By using a constant discharge technique, hydrogen diffusion coefficient coated was 6.75 {times} 10{sup {minus}11} cm{sup 2}/s.