Microstructure and some Dynamic Performances of Ti-V-Pd-Cr-Ni Metal Hydride Electrode Alloy

Abstract

Microstructure and Some Dynamic Parameters of Ti-V-Pd-Cr-Ni metal hydride electrode alloy have been investigated by XRD, FESEM and EIS measurements. The result shows that the alloy is mainly composed of bcc phase and TiNi-based secondary phase. The discharge capacity increases with increasing temperature in a wider temperature region from 303 K to 343 K. The result of electrochemical impedance spectrometry indicates that RT decreases with increasing temperature, which is 2.392Ω, 0.531Ω and 0.156Ω at 303K, 323K and 343K, respectively. However, I0 increases with increasing temperature, which is 72.76 mA g-1, 327.75 mA g-1 and 1262.88 mA g-1 at 303K, 323K and 343K, respectively.