Transactions of Nonferrous Metals Society of China
JOURNAL OF RAILWAY SCIENCE AND ENGINEERING
|Vol. 11 No. 5 October 2001|
（Shanghai Institute of Metallurgy, Chinese Academy of
Sciences,Shanghai 200050, P.R.China）
Abstract: Hydrogen diffusion coefficients in MlNi3.75Co0.65Mn0.4Al0.2 alloy electrode as a function of state of charge (SOC) or temperature were determined by chronoamperometry. It is found that hydrogen diffusion coefficient decreases with the increase of SOC or the decrease of temperature. The activation energy for hydrogen diffusion in the alloy electrode with 50%SOC is evaluated to be 19.9?kJ/mol.
Key words: hydrogen storage alloy electrode; hydrogen diffusion coefficient, chronoamperometry