title: Interwoven three-dimensional architecture of cobalt oxide nanobrush-graphene@Ni(x)Co(2x)(OH)(6x) for high-performance supercapacitors.
abstract: Development of pseudocapacitor electrode materials with high comprehensive electrochemical performance, such as high capacitance, superior reversibility, excellent stability, and good rate capability at the high mass loading level, still is a tremendous challenge. To our knowledge, few works could successfully achieve the above comprehensive electrochemical performance simultaneously. Here we design and synthesize one interwoven three-dimensional (3D) architecture of cobalt oxide nanobrush-graphene@Ni(x)Co(2x)(OH)(6x) (CNG@NCH) electrode with high comprehensive electrochemical performance: high specific capacitance (2550 F g(-1) and 5.1 F cm(-2)), good rate capability (82.98% capacitance retention at 20 A g(-1) vs 1 A g(-1)), superior reversibility, and cycling stability (92.70% capacitance retention after 5000 cycles at 20 A g(-1)), which successfully overcomes the tremendous challenge for pseudocapacitor electrode materials. The asymmetric supercapacitor of CNG@NCH//reduced-graphene-oxide-film exhibits good rate capability (74.85% capacitance retention at 10 A g(-1) vs 0.5 A g(-1)) and high energy density (78.75 Wh kg(-1) at a power density of 473 W kg(-1)). The design of this interwoven 3D frame architecture can offer a new and appropriate idea for obtaining high comprehensive performance electrode materials in the energy storage field.
authors.affiliation: State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology , Wuhan 430070, China.
authors.forename: Longbing
authors.initials: L
authors.lastname: Qu
authors.forename: Yunlong
authors.initials: Y
authors.lastname: Zhao
authors.forename: Aamir Minhas
authors.initials: AM
authors.lastname: Khan
authors.forename: Chunhua
authors.initials: C
authors.lastname: Han
authors.forename: Kalele Mulonda
authors.initials: KM
authors.lastname: Hercule
authors.forename: Mengyu
authors.initials: M
authors.lastname: Yan
authors.forename: Xingyu
authors.initials: X
authors.lastname: Liu
authors.forename: Wei
authors.initials: W
authors.lastname: Chen
authors.forename: Dandan
authors.initials: D
authors.lastname: Wang
authors.forename: Zhengyang
authors.initials: Z
authors.lastname: Cai
authors.forename: Wangwang
authors.initials: W
authors.lastname: Xu
authors.forename: Kangning
authors.initials: K
authors.lastname: Zhao
authors.forename: Xiaolin
authors.initials: X
authors.lastname: Zheng
authors.forename: Liqiang
authors.initials: L
authors.lastname: Mai
keywords: Three-dimensional frame architecture; cobalt oxide nanobrush-graphene@nickle-cobalt hydroxides; comprehensive performance; pseudocapacitor materials; tremendous challenge