title: Integrating NiCo Alloys with Their Oxides as Efficient Bifunctional Cathode Catalysts for Rechargeable Zinc-Air Batteries.
abstract: The lack of high-efficient, low-cost, and durable bifunctional electrocatalysts that act simultaneously for the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER) is currently one of the major obstacles to commercializing the electrical rechargeability of zinc-air batteries. A nanocomposite CoO-NiO-NiCo bifunctional electrocatalyst supported by nitrogen-doped multiwall carbon nanotubes (NCNT/CoO-NiO-NiCo) exhibits excellent activity and stability for the ORR/OER in alkaline media. More importantly, real air cathodes made from the bifunctional NCNT/CoO-NiO-NiCo catalysts further demonstrated superior performance to state-of-the-art Pt/C or Pt/C+IrO2 catalysts in primary and rechargeable zinc-air batteries.
authors.affiliation: Department of Energy Engineering, School of Energy and Chemical Engineering, National Institute of Science and Technology (UNIST), Ulsan 689-798 (Korea).
authors.forename: Xien
authors.initials: X
authors.lastname: Liu
authors.affiliation: Department of Energy Engineering, School of Energy and Chemical Engineering, National Institute of Science and Technology (UNIST), Ulsan 689-798 (Korea).
authors.forename: Minjoon
authors.initials: M
authors.lastname: Park
authors.affiliation: Beamline Research Division, Pohang Accelerator Laboratory (PAL), Pohang 790-784 (Korea).
authors.forename: Min Gyu
authors.initials: MG
authors.lastname: Kim
authors.affiliation: Department of Chemical and Biological Engineering, University at Buffalo, State University of New York, Buffalo, NY 14260 (USA).
authors.forename: Shiva
authors.initials: S
authors.lastname: Gupta
authors.affiliation: Department of Chemical and Biological Engineering, University at Buffalo, State University of New York, Buffalo, NY 14260 (USA). gangwu@buffalo.edu.
authors.forename: Gang
authors.initials: G
authors.lastname: Wu
authors.affiliation: Department of Energy Engineering, School of Energy and Chemical Engineering, National Institute of Science and Technology (UNIST), Ulsan 689-798 (Korea). jpcho@unist.ac.kr.
authors.forename: Jaephil
authors.initials: J
authors.lastname: Cho
keywords: bifunctional electrocatalysts; nickel-cobalt alloy; oxygen evolution reaction; oxygen reduction reaction; zinc-air batteries