title: Self-Assembled NiO/Ni(OH)2 Nanoflakes as Active Material for High-Power and High-Energy Hybrid Rechargeable Battery.
abstract: Herein, a proof-of-concept of novel hybrid rechargeable battery based on electrochemical reactions of both nickel-zinc and zinc-air batteries is demonstrated using NiO/Ni(OH)2 nanoflakes self-assembled into mesoporous spheres as the active electrode material. The hybrid battery operates on two sets of fundamentally different battery reactions combined at the cell level, unlike in other hybrid systems where batteries of different reactions are simply connected through an external circuitry. As a result of combining nickel-zinc and zinc-air reactions, the hybrid battery demonstrates both remarkably high power density (volumetric, 14 000 W L(-1); gravimetric, 2700 W kg(-1)) and energy density of 980 W h kg(-1), significantly outperforming the performances of a conventional zinc-air battery. Furthermore, the hybrid battery demonstrates excellent charge rate capability up to 10 times faster than the rate of discharge without any capacity and voltage degradations, which makes it highly suited for large-scale applications such as electric vehicle propulsion and smart-grid energy storage.
authors: Department of Chemical Engineering, Waterloo Institute for Nanotechnology, Waterloo Institute for Sustainable Energy, University of Waterloo , 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada.
authors: Dong Un
authors: DU
authors: Lee
authors: Department of Chemical Engineering, Waterloo Institute for Nanotechnology, Waterloo Institute for Sustainable Energy, University of Waterloo , 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada.
authors: Jing
authors: J
authors: Fu
authors: Department of Chemical Engineering, Waterloo Institute for Nanotechnology, Waterloo Institute for Sustainable Energy, University of Waterloo , 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada.
authors: Moon Gyu
authors: MG
authors: Park
authors: Department of Chemical Engineering, Waterloo Institute for Nanotechnology, Waterloo Institute for Sustainable Energy, University of Waterloo , 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada.
authors: Hao
authors: H
authors: Liu
authors: Department of Chemical Engineering, Waterloo Institute for Nanotechnology, Waterloo Institute for Sustainable Energy, University of Waterloo , 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada.
authors: Ali
authors: A
authors: Ghorbani Kashkooli
authors: Department of Chemical Engineering, Waterloo Institute for Nanotechnology, Waterloo Institute for Sustainable Energy, University of Waterloo , 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada.
authors: Zhongwei
authors: Z
authors: Chen
keywords: Nickel−zinc batteries; high energy; high power; hybrid batteries; zinc−air batteries