title: Amorphous Ni-Co Binary Oxide with Hierarchical Porous Structure for Electrochemical Capacitors.
abstract: A simple and outstanding approach is provided to fabricate amorphous structure Ni-Co binary oxide as supercapacitors electrode materials. We can easily obtain porous Ni-Co oxides composite materials via chemical bath deposition and subsequent calcination without any template or complicate operation procedures. The amorphous porous Ni-Co binary oxide exhibits brilliant electrochemical performance: first, the peculiar porous structure can effectively transport electrolytes and shorten the ion diffusion path; second, binary composition and amorphous character introduce more surface defects for redox reactions. It shows a high specific capacitance up to 1607 F g(-1) and can be cycled for 2000 cycles with 91% capacitance retention. In addition, the asymmetric supercapacitor delivers superior energy density of 28 W h kg(-1), and the maximum power density of 3064 W kg(-1) with a high energy density of 10 W h kg(-1).
authors.affiliation: College of Materials and Energy, South China Agricultural University , 483 Wushan Road, Guangzhou 510642, China.
authors.forename: Chao
authors.initials: C
authors.lastname: Long
authors.affiliation: College of Materials and Energy, South China Agricultural University , 483 Wushan Road, Guangzhou 510642, China.
authors.forename: Mingtao
authors.initials: M
authors.lastname: Zheng
authors.affiliation: College of Materials and Energy, South China Agricultural University , 483 Wushan Road, Guangzhou 510642, China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Xiao
authors.affiliation: College of Materials and Energy, South China Agricultural University , 483 Wushan Road, Guangzhou 510642, China.
authors.forename: Bingfu
authors.initials: B
authors.lastname: Lei
authors.affiliation: College of Materials and Energy, South China Agricultural University , 483 Wushan Road, Guangzhou 510642, China.
authors.forename: Hanwu
authors.initials: H
authors.lastname: Dong
authors.affiliation: College of Materials and Energy, South China Agricultural University , 483 Wushan Road, Guangzhou 510642, China.
authors.forename: Haoran
authors.initials: H
authors.lastname: Zhang
authors.affiliation: College of Materials and Energy, South China Agricultural University , 483 Wushan Road, Guangzhou 510642, China.
authors.forename: Hang
authors.initials: H
authors.lastname: Hu
authors.affiliation: College of Materials and Energy, South China Agricultural University , 483 Wushan Road, Guangzhou 510642, China.
authors.forename: Yingliang
authors.initials: Y
authors.lastname: Liu
keywords: Ni−Co binary oxide; amorphous defects; chemical bath deposition; porous structure; synergistic effect