| 초록 |
To realize feasible devices for sustainable energy storage, electro-catalysts should have competitive price and effective bifunctional reactivity for both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). In this regard, hybrid catalysts were suggested to satisfy the requirements. The infiltration technique is selected for the fabrication due to its simplicity and easiness. Herein, we designed a bifunctional hybrid catalyst (NSC@Co3O4) consisting of a Nd0.5Sr0.5CoO3- (NSC) perovskite and Co3O4nanoparticles. Interestingly, the infiltration tried directly on the powder enhanced the onset potential and the limiting current for ORR and OER with unique microstructure. Furthermore, NSC@Co3O4 shows outstanding cell performance with the discharge-charge voltage gap of 0.5 V and excellent stability during 60 h for hybrid Li-air batteries, whereas those were 1.18 ~ 1.64 V and 40 h for Pt/C. |
