A flexible wearable self-supporting hybrid supercapacitor device based on hierarchical nickel cobalt sulfide@C electrode

Chen, Xin, Sun, Ming, Jaber, Fadi, Nezhad, Erfan Zal, Hui, K. S. ORCID: https://orcid.org/0000-0001-7089-7587, Li, Zhenwu, Bae, Sungchul and Ding, Muge (2023) A flexible wearable self-supporting hybrid supercapacitor device based on hierarchical nickel cobalt sulfide@C electrode. Scientific Reports, 13 (1). ISSN 2045-2322

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A flexible wearable electrode consisting of nickel–cobalt sulfide (NCS) nanowires was fabricated in this study. Self-supporting NCS was grown in situ on porous carbon nanofibers without a binder as a novel material for supercapacitor electrodes. The NCS nanowires were grown using cyclic voltammetry electrodeposition, which proved to be a fast and environmentally friendly method with good controllability of the material structure. One-dimensional carbon nanofibers (C) have high surface-area-to-volume ratios, short ion transmission distances, excellent mechanical strengths, and remarkable flexibilities. Moreover, the NCS@C flexible electrode exhibited a synergetic effect with the active compounds, and the dense active sites were uniformly distributed across the entire surface of the carbon fibers, enabling rapid electron transport and enhancing the electrochemical properties of the NCS@C nanowires. The NCS@C achieved specific capacitances of 334.7 and 242.0 mAh g−1 at a current density of 2 A g−1 and high current densities (up to 40 A g−1), respectively, corresponding to a 72.3% retention rate. An NCS@C-nanofilm-based cathode and an activated-carbon-based anode were used to fabricate a flexible asymmetric supercapacitor. The device exhibited high energy and power densities of 12.91 Wh kg−1 and 358 W kg−1, respectively.

Item Type: Article
Additional Information: Funding Information: This study was supported by National Research Foundation of Korea (NRF) grants funded by the Korean government (MSIT) (Grant Numbers: RS-2023-00207763 and NRF-2022R1A2C2010350) and the Science and Technology Project of Shandong Province (Heze University Grant No. 010008002042007) and. Publisher Copyright: © 2023, Springer Nature Limited.
Uncontrolled Keywords: general ,/dk/atira/pure/subjectarea/asjc/1000
Faculty \ School: Faculty of Science > School of Mathematics
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Depositing User: LivePure Connector
Date Deposited: 04 Apr 2024 11:30
Last Modified: 04 Apr 2024 11:31
URI: https://ueaeprints.uea.ac.uk/id/eprint/94812
DOI: 10.1038/s41598-023-42278-9


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