Fabrication of Superhigh-Power-Density Rechargeable Zn–Air Batteries by Incorporating Nanoporous Alloy Materials as Oxygen Catalysts

Both self-supported and graphene oxide (GO)-supported nanoporous Ni–Fe–Co-based alloy materials and Ni–Re-based superalloy nanowire materials were successfully synthesized and used as electrocatalysts for developing high-performance rechargeable Zn–air batteries. Rechargeable Zn–air batteries with a superhigh power density of about 500 mWh/cm2 were successfully developed with the unique nanoalloy electrocatalysts of nanoporous Ni–Fe–Co-based alloy materials and Ni–Re-based superalloy nanowire materials. The discharge and charge performance of the fabricated Zn–air batteries with the different electrocatalysts were compared.