Design of Oxygen Reduction Catalysts in Primary Zinc-Air Batteries

Oxygen reduction reaction (ORR) is a highly crucial electrode reaction in the primary Zn-air battery, but which is hampered by the sluggish kinetics. The electrocatalyst with high ORR activity is therefore needed for low-cost and high-performance Zn-air batteries. This chapter systematically introduces recent advances in the electrocatalysts for ORR, which include precious metals, single-atom nanomaterials, metal-free carbon, transition metal-carbon hybrids, transition-metal oxides with simple, spinel, or perovskite structures, miscellaneous catalysts, and so on. The applications of those ORR electrocatalysts to primary Zn-air batteries are also briefly reviewed.