title: Three-dimensional porous ZnCo(2)O(4) sheet array coated with Ni(OH)(2) for high-performance asymmetric supercapacitor.
abstract: Hierarchical ZnCo2O4@Ni(OH)2sheet composite structures on Ni foam were rationally designed and successfully synthesized. The ZnCo2O4micro-sheets grown on Ni foam served as the skeleton to improve the electrical conductivity of redox active Ni(OH)2materials, providing more electroactive sites for the faradaic reaction, and solidify the Ni(OH)2materials onto Ni foam as a current collector. The electrode of ZnCo2O4@Ni(OH)2showed an ultrahigh areal capacitance of 4.6F/cm2at a current density of 2mA/cm2. A lightweight and small asymmetric supercapacitor (ASC) device was successfully fabricated using the ZnCo2O4@Ni(OH)2and carbonized filter paper (CFP) as positive and negative electrode, respectively. The ASC could work in a large potential window of 0-1.8V and achieve a high energy density of 49Wh/kg at 428W/kg.
authors.affiliation: Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, PR China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Pan
authors.affiliation: Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, PR China. Electronic address: gaohong65cn@126.com.
authors.forename: Hong
authors.initials: H
authors.lastname: Gao
authors.affiliation: Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, PR China; Center for Advanced Optoelectronic Functional Materials Research, Key Laboratory of UV Light-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, Changchun 130024, PR China.
authors.forename: Mingyi
authors.initials: M
authors.lastname: Zhang
authors.affiliation: Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, PR China.
authors.forename: Lu
authors.initials: L
authors.lastname: Li
authors.affiliation: Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, PR China.
authors.forename: Guangning
authors.initials: G
authors.lastname: Wang
authors.affiliation: Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, PR China.
authors.forename: Xinyuan
authors.initials: X
authors.lastname: Shan
keywords: Asymmetric supercapacitor; Composite electrode; High areal capacitance; High energy density; ZnCo(2)O(4)@Ni(OH)(2)