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Title: High electrochemical performance of Bi2WO6/carbon nano-onion composites as electrode materials for pseudocapacitors
Authors: Zhang, Weike
Peng, Lin
Wang, Jiawei
Guo, Chunli
Chan, Siew Hwa
Zhang, Lan
Keywords: Science::Chemistry
Issue Date: 2020
Source: Zhang, W., Peng, L., Wang, J., Guo, C., Chan, S. H., & Zhang, L. (2020). High electrochemical performance of Bi2WO6/carbon nano-onion composites as electrode materials for pseudocapacitors. Frontiers in Chemistry, 8, 577-. doi:10.3389/fchem.2020.00577
Journal: Frontiers in Chemistry 
Abstract: Bi2WO6/CNO (CNO, carbon nano-onion) composites are synthesized via a facile low-cost hydrothermal method and are used pseudocapacitor electrode material. X-ray diffraction (XRD), Fourier transform infrared spectra (FT-IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), N2 adsorption-desorption techniques, and X-ray photoelectron spectroscopy (XPS) measurements are used to characterize the synthesized composite powders. The electrochemical performances of the composite electrodes are studied by cycle voltammetry, charge-discharge, and electrochemical impedance spectroscopy. The results indicate that the specific capacitance of the Bi2WO6/CNO composite materials reaches up to 640.2 F/g at a current density of 3 mA/cm2 and higher than that of pristine Bi2WO6, 359.1 F/g. The capability of the prepared pseudocapacitor remains 90.15% after 1,000 cycles of charge-discharge cycling measurement. The cell performance and stability can be enhanced by further optimization and modification of the composition and microstructure of the electrode of the cell.
ISSN: 2296-2646
DOI: 10.3389/fchem.2020.00577
Rights: © 2020 Zhang, Peng, Wang, Guo, Chan and Zhang. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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