title: NiO-Microflower Formed by Nanowire-weaving Nanosheets with Interconnected Ni-network Decoration as Supercapacitor Electrode.
abstract: We propose a 'weaving' evolution mechanism, by systematically investigating the products obtained in controlled experiments, to demonstrate the formation of Ni-based 'microflowers' which consists of multiple characteristic dimensions, in which the three dimensional (3D) NiO 'microflower' is constructed by a two-dimensional (2D) nanosheet framework that is derived from weaving one-dimensional (1D) nanowires. We found such unique nanostructures are conducive for the generation of an electrically conductive Ni-network on the nanosheet surface after being exposed to a reducing atmosphere. Our study offers a promising strategy to address the intrinsic issue of poor electrical conductivity for NiO-based materials with significant enhancement of utilization of NiO active materials, leading to a remarkable improvement in the performance of the Ni-NiO microflower based supercapacitor. The optimized Ni-NiO microflower material showed a mass specific capacitance of 1,828 F g(-1), and an energy density of 15.9 Wh kg(-1) at a current density of 0.5 A g(-1). This research not only contributes to understanding the formation mechanism of such 'microflower' structures but also offers a promising route to advance NiO based supercapacitor given their ease of synthesis, low cost, and long-term stability.
authors.affiliation: 1] Department of Mechanical Engineering, University of Wisconsin-Milwaukee, Milwaukee Wisconsin 53211, United States [2] Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, PR China.
authors.forename: Suqing
authors.initials: S
authors.lastname: Ci
authors.affiliation: 1] Department of Mechanical Engineering, University of Wisconsin-Milwaukee, Milwaukee Wisconsin 53211, United States [2] Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, PR China.
authors.forename: Zhenhai
authors.initials: Z
authors.lastname: Wen
authors.affiliation: Department of Mechanical Engineering, University of Wisconsin-Milwaukee, Milwaukee Wisconsin 53211, United States.
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Qian
authors.affiliation: Department of Mechanical Engineering, University of Wisconsin-Milwaukee, Milwaukee Wisconsin 53211, United States.
authors.forename: Shun
authors.initials: S
authors.lastname: Mao
authors.affiliation: Department of Mechanical Engineering, University of Wisconsin-Milwaukee, Milwaukee Wisconsin 53211, United States.
authors.forename: Shumao
authors.initials: S
authors.lastname: Cui
authors.affiliation: Department of Mechanical Engineering, University of Wisconsin-Milwaukee, Milwaukee Wisconsin 53211, United States.
authors.forename: Junhong
authors.initials: J
authors.lastname: Chen