The La0.6Sr0.4CoO3 perovskite catalyst for Li-O2 battery

• The Li-O2 battery based on the La0.6Sr0.4CoO3/Super-p electrode was fabricated and measured.
• The electrochemical performance was analyzed by the electrochemical impedance spectroscopy (EIS) change of battery.
• The cycle life of battery could be improved by controlling the depth of discharge.

The La0.6Sr0.4CoO3 (LSCO) perovskite oxide has been synthesized by a dry gel combustion method and characterized by TGA, XRD, SEM and BET. The initial discharge capacities of LSCO/super-p electrode were 3672.1 mA h · g− 1(carbon), 1418.4 mA h·g− 1(carbon) and 1237.5 mA h · g− 1(carbon) at the current densities of 30 mA · g− 1 50 mA · g− 1 and 80 mA · g− 1 respectively. The discharge capacity was maintained 16 times when the cut-off capacity was set as 500 mA h · g− 1(carbon). The electrochemical impedance spectroscopy (EIS) data revealed that the impedance of battery would increase more quickly if the current density became larger after the same cycles.