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Title: Integration of flexibility, cyclability and high-capacity into one electrode for sodium-ion hybrid capacitors with low self-discharge rate
Authors: Wang, Huanwen
Xu, Dongming
Jia, Guichong
Mao, Zhifei
Gong, Yansheng
He, Beibei
Wang, Rui
Fan, Hong Jin
Keywords: Engineering::Materials
Issue Date: 2020
Source: Wang, H., Xu, D., Jia, G., Mao, Z., Gong, Y., He, B., . . . Fan, H. J. (2020). Integration of flexibility, cyclability and high-capacity into one electrode for sodium-ion hybrid capacitors with low self-discharge rate. Energy Storage Materials, 25, 114-123. doi:10.1016/j.ensm.2019.10.024
Journal: Energy Storage Materials
Abstract: Metal-ion hybrid capacitors are regarded as promising power sources for portable electronics because of numerous opportunities in designing the anode/cathode couple to realize high performance and device flexibility. Here we demonstrate our rational design of a porous-fiber network based electrode for quasi-solid-state flexible Na-ion hybrid capacitors. A SiO2-etching approach is deployed to synthesize the freestanding porous carbon nanofiber (PCNF) membrane that is both mechanically robust and light (~1 mg cm−2). The PCNF serves as a 3D scaffold for the uniform growth of MoS2@poly(3,4-ethylenedioxythiophene) (PEDOT) core/shell nanosheets. The resultant PCNF@MoS2@PEDOT double core/shell nanofiber electrode not only maintains the intrinsic high-capacity of MoS2 for Na-ion storage, but also renders long-term cyclability and high rate performance. The constructed quasi-solid-state Na-ion hybrid capacitors can tolerate arbitrary bending and folding, and has a much lower self-discharge rate (15 mV h-1) compared to symmetric capacitors.
ISSN: 2405-8297
DOI: 10.1016/j.ensm.2019.10.024
Rights: © 2019 Elsevier B.V. All rights reserved. All rights reserved. This paper was published in Energy Storage Materials and is made available with permission of Elsevier B.V.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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