No-precious bifunctional catalysts with high electrochemical activities and stability were crucial to properties of rechargeable zinc-air batteries. Herein, LaNiO₃ modified with Ag nanoparticles (Ag/LaNiO₃) was prepared by the co-synthesis method and evaluated as the bifunctional oxygen catalyst for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). Compared with LaNiO₃, Ag/LaNiO₃ demonstrated the enhanced catalytic activity towards ORR/OER as well as higher limited current density and lower onset potential. Moreover, the potential gap between ORR potential (at −3 mA·cm⁻²) and OER potential (at 5 mA·cm⁻²) was 1.16 V. The maximum power density of the primary zinc-air battery with Ag/LaNiO₃ catalyst achieved 60 mW·cm⁻². Furthermore, rechargeable zinc-air batteries operated reversible charge-discharge cycles for 150 cycles without noticeable performance deterioration, which showed its excellent bifunctional activity and cycling stability as oxygen electrocatalyst for rechargeable zinc-air batteries. These results indicated that Ag/LaNiO₃ prepared by the co-synthesis method was a promising bifunctional catalyst for rechargeable zinc-air batteries.

具有高电化学活性和稳定性的贵金属双功能催化剂对可充电锌空气电池的性能至关重要。在此，通过共合成方法制备了用Ag纳米粒子改性的LaNiO ₃（Ag / LaNiO ₃），并被评价为用于氧还原反应（ORR）和氧释放反应（OER）的双功能氧催化剂。与LaNiO ₃相比，Ag / LaNiO ₃表现出对ORR / OER的增强的催化活性，以及​​更高的极限电流密度和更低的起始电位。此外，ORR电势（在-3 mA·cm ^-2时）和OER电势（在5 mA·cm ^-2时）之间的电势差）为1.16V。使用Ag / LaNiO ₃催化剂的一次锌空气电池的最大功率密度达到60 mW·cm ^-2。此外，可再充电的锌-空气电池可逆充电-放电循环进行150个循环，而性能没有明显下降，这显示出其出色的双功能活性和循环稳定性，作为可再充电的锌-空气电池的氧电催化剂。这些结果表明，通过共合成方法制备的Ag / LaNiO ₃是用于可再充电锌-空气电池的有前途的双功能催化剂。