Abstract
The electrochemical hydrogen storage properties of the LaFe0.8Ni0.2O3 perovskite-type oxide used as the negative electrode in the nickel metal-hydride battery have been studied in this work. This oxide has been synthesized by the sol-gel method and its structure and electrochemical properties are systematically studied. X-ray diffraction (XRD) analysis showed that the LaFe0.8Ni0.2O3 perovskite-type oxide consists of a single phase and crystallizes in the orthorhombic space group with the Pnma space group. The electrochemical cycling properties of the LaFe0.8Ni0.2O3 negative electrode were carried out at 25 degrees C using the galvanostatic charging and discharging polarization method for 50 cycles. An optimization of the experimental parameters were carried out in order to optimize the charging potential, the charging and discharging current and the charging time. The best properties were observed for the optimal parameters, such as a discharge potential of 0.4V, a charge and discharge current of 4.44 mA g-1 and a charge time of 5 h.