title: Large-Scale Self-Assembly of 3D Flower-like Hierarchical Ni/Co-LDHs Microspheres for High-Performance Flexible Asymmetric Supercapacitors.
abstract: In this study, a facile and inexpensive and self-assembled strategy to massively fabricate Ni/Co layered double hydroxides (LDHs) is developed under mild reaction conditions (55 °C). The resulting composite material displays a special three-dimensional hierarchical microsphere structure with well-defined flower-like configuration. The fabrication mechanism can be ascribed to stepwise and regular reaction process of nanoparticles and nanosheets gradually growing to nanopetals and then assembling into flower-like microspheres, based on the systematically investigation of various reaction factors including the Ni:Co feeding ratio, the reaction time and the initial pH-value. Because of its large surface, ultrathin feature and synergetic results of this Ni/Co LDHs nanosheets (20 nm), these Ni/Co-LDHs microspheres deliver an excellent capacitance value about 2228 F·g(-1) (1 A·g(-1)). An all-solid-state flexible asymmetric supercapacitor is designed and assembled by exploiting this Ni/Co-LDHs as the positive materials, which exhibits energy density of 165.51 Wh·kg(1-) at 1.53 KW·kg(1-). It may have vast potential significance in personal wearable equipment. Moreover, this monolithic design provides a promising approach for large scale fabrication of other LDHs materials.
authors.affiliation: i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences (CAS) , 398 Ruoshui Road, Suzhou, 215123, P. R. China.
authors.forename: T
authors.initials: T
authors.lastname: Li
authors.affiliation: i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences (CAS) , 398 Ruoshui Road, Suzhou, 215123, P. R. China.
authors.forename: G H
authors.initials: GH
authors.lastname: Li
authors.affiliation: i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences (CAS) , 398 Ruoshui Road, Suzhou, 215123, P. R. China.
authors.forename: L H
authors.initials: LH
authors.lastname: Li
authors.affiliation: i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences (CAS) , 398 Ruoshui Road, Suzhou, 215123, P. R. China.
authors.forename: L
authors.initials: L
authors.lastname: Liu
authors.affiliation: i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences (CAS) , 398 Ruoshui Road, Suzhou, 215123, P. R. China.
authors.forename: Y
authors.initials: Y
authors.lastname: Xu
authors.affiliation: i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences (CAS) , 398 Ruoshui Road, Suzhou, 215123, P. R. China.
authors.forename: H Y
authors.initials: HY
authors.lastname: Ding
authors.affiliation: i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences (CAS) , 398 Ruoshui Road, Suzhou, 215123, P. R. China.
authors.forename: T
authors.initials: T
authors.lastname: Zhang
keywords: Ni/Co-LDHs; flexible asymmetric supercapacitors; large-scale; self-assembly; three-dimensional