Abstract
A series of La0.8Sr0.2Mn1-xCoxO3 (x = 0.1, 0.2, 0.4, 0.6) perovskite-type composite oxides were prepared by the template method using carbon microspheres as template. Among them, La0.8Sr0.2Mn0.8Co0.2O3 has excellent bifunctional electrocatalytic activity, and its oxygen reduction process is a four-electron reaction pathway. Its initial potential is closest to that of commercial Pt/C, with a difference of only 60 mV. The limit current density is basically consistent with that of commercial Pt/C. When it is used as cathode catalyst of aluminum-air battery, the discharge voltage of aluminum-air battery can remain stable under different current density, which is higher than that of undoped LaMnO3.
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