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

Journal Article · · ACS Nano
 [1];  [1];  [2];  [3];  [3];  [1];  [3];  [3]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [5]; ORCiD logo [1]
  1. The Univ. of Texas at Austin, Austin, TX (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States); Stony Brook Univ., Stony Brook, NY (United States)
  3. Stony Brook Univ., Stony Brook, NY (United States)
  4. Brookhaven National Lab. (BNL), Upton, NY (United States)
  5. Stony Brook Univ., Stony Brook, NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)

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 surfactant. By using ZnFe2O4 (ZFO) nanoparticles as a model material, we demonstrate that by tuning the molecular weight of the Pluronic copolymers that 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. Post-cycling characterization confirms that the samples maintain structural integrity after electrochemical cycling. In conclusion, 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 nextgeneration lithium-ion batteries.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Energy Frontier Research Centers (EFRC) (United States). Center for Mesoscale Transport Properties (m2M)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704
OSTI ID:
1434773
Report Number(s):
BNL-203553-2018-JAAM
Journal Information:
ACS Nano, Vol. 12, Issue 1; ISSN 1936-0851
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 55 works
Citation information provided by
Web of Science

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Probing enhanced lithium-ion transport kinetics in 2D holey nanoarchitectured electrodes journal August 2018
Engineering of Mesoscale Pores in Balancing Mass Loading and Rate Capability of Hematite Films for Electrochemical Capacitors journal August 2018
Real-time monitoring of electrochemical reactions on single nanoparticles by dark-field and Raman microscopy journal January 2019
Construction of a DNA-Based Supramolecular Nanosheet That Emits Bluish-White Light from Charge-Transfer Excited States of the Nucleobases journal January 2019
Unique Co 3 O 4 /nitrogen-doped carbon nanospheres derived from metal–organic framework: insight into their superior lithium storage capabilities and electrochemical features in high-voltage batteries journal January 2018
Ultrafast Intercalation Enabled by Strong Solvent-Host Interactions: Understanding Solvent Effect at the Atomic Level journal October 2019
Temperature-controlled morphology evolution of porphyrin nanostructures on a hydrophobic substrate journal January 2018
Using symmetry to elucidate the importance of stoichiometry in colloidal crystal assembly journal May 2019
Ultrafast Intercalation Enabled by Strong Solvent–Host Interactions: Understanding Solvent Effect at the Atomic Level journal November 2019
A generalized strategy for the synthesis of two-dimensional metal oxide nanosheets based on a thermoregulated phase transition journal January 2019
Hierarchical 3D electrodes for electrochemical energy storage journal December 2018
Two-dimensional Nb 2 O 5 holey nanosheets prepared by a graphene sacrificial template method for high performance Mg 2+ /Li + hybrid ion batteries journal January 2019
Size-dependent kinetics during non-equilibrium lithiation of nano-sized zinc ferrite journal January 2019
Evaporation‐Induced Vertical Alignment Enabling Directional Ion Transport in a 2D‐Nanosheet‐Based Battery Electrode journal January 2020
Using symmetry to elucidate the importance of stoichiometry in colloidal crystal assembly journal May 2019

Figures / Tables (7)