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Title: Flexible quasi-solid-state 2.4 V aqueous asymmetric microsupercapacitors with ultrahigh energy density
Authors: Zhang, Qichong
Zhang, Jun
Zhou, Zhenyu
Wei, Lei
Yao, Yagang
Keywords: Asymmetric Microsupercapacitors
Ultrahigh Energy Density
Engineering::Electrical and electronic engineering
Issue Date: 2018
Source: Zhang, Q., Zhang, J., Zhou, Z., Wei, L., & Yao, Y. (2018). Flexible quasi-solid-state 2.4 V aqueous asymmetric microsupercapacitors with ultrahigh energy density. Journal of Materials Chemistry A, 6(41), 20145-20151. doi:10.1039/C8TA07727D
Series/Report no.: Journal of Materials Chemistry A
Abstract: Extensive research efforts have recently been devoted to the development of high-energy-density flexible microsupercapacitors (MSCs) to satisfy the rapidly increasing demands for wearable and portable electronics. However, the widespread application of MSCs in high-energy-consuming personal electronic devices has been hindered by their low operating voltages and unsatisfactory specific capacitances. Here, we demonstrate a simple and cost-effective cut-and-transfer method to fabricate flexible quasi-solid-state 2.4 V aqueous asymmetric MSCs (AMSCs) by employing hierarchical Na-MnOx nanosheets on 3D nitrogen-doped carbon fibers as the positive electrode and VN nanosheet arrays as the negative electrode. The resulting AMSCs take advantage of the high specific capacitance and wide electrochemical potential spectrum of the electrode materials to yield a remarkable specific capacitance of 109.5 mF cm−2 and admirable energy density of 87.62 μW h cm−2, outperforming most previously reported MSCs. Thus, this work provides a new way to develop high-voltage aqueous AMSCs for next-generation wearable energy-storage devices.
ISSN: 2050-7488
DOI: 10.1039/C8TA07727D
Schools: School of Electrical and Electronic Engineering 
Rights: © 2018 The Author(s). All rights reserved. This paper was published by Royal Society of Chemistry in Journal of Materials Chemistry A and is made available with permission of The Author(s).
Fulltext Permission: open
Fulltext Availability: With Fulltext
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