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

• Published in: Nano energy Vol. 30; pp. 801 - 809
• Main Authors: Wu, Haihua, Wang, Jing, Wang, Guoxiong, Cai, Fan, Ye, Yifan, Jiang, Qike, Sun, Shucheng, Miao, Shu, Bao, Xinhe
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.12.2016
• Subjects: Bifunctional oxygen electrocatalyst; Iron–nickel alloy; Iron–nickel substitution; Nitrogen-fluorine co-doped carbon; Perfluorosulfonic acid/polytetrafluoroethylene copolymer; Iron–nickel substitution; Nitrogen-fluorine co-doped carbon; Perfluorosulfonic acid/polytetrafluoroethylene copolymer; Bifunctional oxygen electrocatalyst; Iron–nickel alloy
• ISSN: 2211-2855
• DOI: 10.1016/j.nanoen.2016.09.016

Heteroatom-doped carbon materials and 3d transition metals have shown high activity and durability for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), respectively, but poor bifunctionality. Herein, we use iron and nickel substituted perfluorosulfonic acid/polytetrafluoroethylene copolymer with uniform distribution and conveniently adjustable ratios of metal ions 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, and exhibits excellent bifunctionality in alkaline medium, demonstrating high performance and cycling durability in rechargeable zinc–air battery. 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. [Display omitted] •Copolymer containing perfluorosulfonic acid immobilizes iron and nickel ions.•Fe, Ni-substituted copolymer and dicyandiamide is pyrolyzed in inert atmosphere.•Nitrogen and fluorine co-doped carbon supported FeNi hybrid material is obtained.•The hybrid material shows excellent bifunctionality for oxygen electrocatalysis.•The hybrid material exhibits high performance in rechargeable zinc[HYPHEN]air battery.