Two-Dimensional Holey Nanoarchitectures Created by Confined Self-Assembly of Nanoparticles via Block Copolymers: From Synthesis to Energy Storage Property.

Autor: Peng L; Materials Science and Engineering Program and Department of Mechanical Engineering, The University of Texas at Austin , Austin, Texas 78712, United States., Fang Z; Materials Science and Engineering Program and Department of Mechanical Engineering, The University of Texas at Austin , Austin, Texas 78712, United States., Li J; Center for Functional Nanomaterials, Brookhaven National Laboratory , Upton, New York 11973, United States.; Department of Materials Science and Engineering, Stony Brook University , Stony Brook, New York 11794, United States., Wang L; Department of Chemistry, Stony Brook University , Stony Brook, New York 11794, United States., Bruck AM; Department of Chemistry, Stony Brook University , Stony Brook, New York 11794, United States., Zhu Y; Materials Science and Engineering Program and Department of Mechanical Engineering, The University of Texas at Austin , Austin, Texas 78712, United States., Zhang Y; Department of Chemistry, Stony Brook University , Stony Brook, New York 11794, United States., Takeuchi KJ; Department of Chemistry, Stony Brook University , Stony Brook, New York 11794, United States.; Department of Materials Science and Engineering, Stony Brook University , Stony Brook, New York 11794, United States., Marschilok AC; Department of Chemistry, Stony Brook University , Stony Brook, New York 11794, United States.; Department of Materials Science and Engineering, Stony Brook University , Stony Brook, New York 11794, United States., Stach EA; Center for Functional Nanomaterials, Brookhaven National Laboratory , Upton, New York 11973, United States., Takeuchi ES; Department of Chemistry, Stony Brook University , Stony Brook, New York 11794, United States.; Department of Materials Science and Engineering, Stony Brook University , Stony Brook, New York 11794, United States.; Energy Sciences Directorate, Brookhaven National Laboratory , Upton, New York 11973, United States., Yu G; Materials Science and Engineering Program and Department of Mechanical Engineering, The University of Texas at Austin , Austin, Texas 78712, United States.
Jazyk: angličtina
Zdroj: ACS nano [ACS Nano] 2018 Jan 23; Vol. 12 (1), pp. 820-828. Date of Electronic Publication: 2017 Dec 26.
DOI: 10.1021/acsnano.7b08186
Abstrakt: Advances in liquid-phase exfoliation and surfactant-directed anisotropic growth of two-dimensional (2D) nanosheets have enabled their rapid development. However, it remains challenging to develop assembly strategies that lead to the construction of 2D nanomaterials with well-defined geometry and functional nanoarchitectures that are tailored to specific applications. Here we report a facile self-assembly method leading to the controlled synthesis of 2D transition metal oxide (TMO) nanosheets containing a high density of holes. We utilize graphene oxide sheets as a sacrificial template and Pluronic copolymers as surfactants. By using ZnFe 2 O 4 (ZFO) nanoparticles as a model material, we demonstrate that by tuning the molecular weight of the Pluronic copolymers we can incorporate the ZFO particles and tune the size of the holes in the sheets. The resulting 2D ZFO nanosheets offer synergistic characteristics including increased electrochemically active surface areas, shortened ion diffusion paths, and strong inherent mechanical properties, leading to enhanced lithium-ion storage properties. Postcycling characterization confirms that the samples maintain structural integrity after electrochemical cycling. Our findings demonstrate that this template-assisted self-assembly method is a useful bottom-up route for controlled synthesis of 2D nanoarchitectures, and these holey 2D nanoarchitectures are promising for improving the electrochemical performance of next-generation lithium-ion batteries.
Databáze: MEDLINE
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