High-performance bifunctional oxygen electrocatalyst derived from iron and nickel substituted perfluorosulfonic acid/polytetrafluoroethylene copolymer

Iron and nickel substituted perfluorosulfonic acid/polytetrafluoroethylene copolymer with uniform distribution and conveniently adjustable ratios of metal ions is used as the pyrolysis precursor to synthesize nitrogen and fluorine co-doped carbon supported FeNi hybrid material. The hybrid material integrates ORR and OER active components together, demonstrating high performance and cycling durability in rechargeable zinc-air battery as efficient bifunctional oxygen electrocatalyst.209