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Title: Scalable production of few-layer boron sheets by liquid-phase exfoliation and their superior supercapacitive performance
Authors: Li, Hongling
Jing, Lin
Liu, Wenwen
Lin, Jinjun
Tay, Roland Yingjie
Tsang, Siu Hon
Teo, Edwin Hang Tong
Keywords: DRNTU::Engineering::Electrical and electronic engineering
Few-layer Boron Sheet
Liquid-phase Exfoliation
Issue Date: 2018
Source: Li, H., Jing, L., Liu, W., Lin, J., Tay, R. Y., Tsang, S. H., & Teo, E. H. T. (2018). Scalable production of few-layer boron sheets by liquid-phase exfoliation and their superior supercapacitive performance. ACS Nano, 12(2), 1262-1272. doi:10.1021/acsnano.7b07444
Series/Report no.: ACS Nano
Abstract: Although two-dimensional boron (B) has attracted much attention in electronics and optoelectronics due to its unique physical and chemical properties, in-depth investigations and applications have been limited by the current synthesis techniques. Herein, we demonstrate that high-quality few-layer B sheets can be prepared in large quantities by sonication-assisted liquid-phase exfoliation. By simply varying the exfoliating solvent types and centrifugation speeds, the lateral size and thickness of the exfoliated B sheets can be controllably tuned. Additionally, the exfoliated few-layer B sheets exhibit excellent stability and outstanding dispersion in organic solvents without aggregates for more than 50 days under ambient conditions, owing to the presence of a solvent residue shell on the B sheet surface that provides excellent protection against air oxidation. Moreover, we also demonstrate the use of the exfoliated few-layer B sheets for high-performance supercapacitor electrode materials. This as-prepared device exhibits impressive electrochemical performance with a wide potential window of up to 3.0 V, excellent energy density as high as 46.1 Wh/kg at a power density of 478.5 W/kg, and excellent cycling stability with 88.7% retention of the initial specific capacitance after 6000 cycles. This current work not only demonstrates an effective strategy for the synthesis of the few-layer B sheets in a controlled manner but also makes the resulting materials promising for next-generation optoelectronics and energy storage applications.
ISSN: 1936-0851
DOI: 10.1021/acsnano.7b07444
Rights: © 2018 American Chemical Society. This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Nano, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
Fulltext Permission: open
Fulltext Availability: With Fulltext
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