K2NiF4-type La1.8Sr0.2CuO4 Cathode for Magnesium-air Battery

In this study, the K 2 NiF 4 -type La 1.8 Sr 0.2 CuO 4 has been hydrothermal synthesized and applied in Mg-air battery. The hydrothermal time and heat treatment temperature of synthesized La 1.8 Sr 0.2 CuO 4 has been discussed. X-ray diffraction (XRD) and scanning electron spectroscopy (SEM) were carried out to demonstrate the crystalline structure and morphology of synthesized materials. The electrochemical impedance and discharge performance were studied to understand the catalytic activities of La 1.8 Sr 0.2 CuO 4 . The La 1.8 Sr 0.2 CuO 4 with active carbon addition (La 1.8 Sr 0.2 CuO 4 /AC) in Mg-air battery was found to hold specific discharge capacity of 962 mAh g -1 at current density of 40 mA cm -2 , which was higher than that of the bulk electrode (i.e.,782 mAh g -1 ). The K 2 NiF 4 -type La 1.8 Sr 0.2 CuO 4 has been proved as a potential candidate for air cathode in Mg-air battery.