Electrodeposited nickel aluminum-layered double hydroxide on Co3O4 as binder-free electrode for supercapacitor

Chen, Xin, Yuzhi, Heng, Hui, Li, Bae, Sungchul, Ang, Li, Wang, Zhen, Hui, Kwan San ORCID: https://orcid.org/0000-0001-7089-7587, Hui, Kwun Nam and Nezhad, Erfan Zal (2019) Electrodeposited nickel aluminum-layered double hydroxide on Co3O4 as binder-free electrode for supercapacitor. Journal of Materials Science: Materials in Electronics, 30 (3). pp. 2419-2430. ISSN 0957-4522

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Here, we report a heterostructured core–shell electrode consists of cobalt oxide (Co3O4 ) nanowire core and nickel aluminum (NiAl)-layered double hydroxide (NiAl-LDH; herein Co3O4@LDH) nanosheet shell grown on nickel foam as advanced electrode for supercapacitor. Benefiting from the core–shell configuration and smart hybridization, the optimized Co3O4@LDH core–shell electrode exhibits a high capacitance of 2011 Fg−1 at 2Ag−1 and remains 1455 Fg−1 at 40 Ag−1 , which outperforms the electrochemical performance of individual component of Co3O4 (720 Fg−1 at 2 Ag−1). A hybrid supercapacitor using Co3O4@LDH as positive electrode and carbon nanotube as negative electrode delivers an energy density of 18.1 Whkg−1 at a power density of 375 kWkg−1 at a current density of 0.5 Ag−1 . Smart hybridization of core–shell electrode shows great promise as advanced electrode materials for supercapacitor with high electrochemical performance.

Item Type: Article
Additional Information: Funding Information: Fig. 11 a CV curves of the Co3O4@LDH//CNT ASC at various scan rates. b The galvanostatic charge/discharge curves of the Co3O4@LDH// CNT ASC at various current densities. c Ragone plot of the Co3O4@LDH//CNT ASC. d Schematic of the Co3O4@LDH//CNT ASC Acknowledgements We acknowledge Hanyang University’s financial support through the Young Faculty Forum Fund (Number 201600000001555). This work was supported by the Science and Technology Development Fund of the Macau SAR (FDCT098/2015/A3 and FDCT191/2017/A3), the Multi-Year Research Grants (MYRG2017-00216-FST and MYRG2018-00192-IAPME) from the Research Services and Knowledge Transfer Office at the University of Macau, and the UEA funding. Publisher Copyright: © 2018, Springer Science+Business Media, LLC, part of Springer Nature.
Uncontrolled Keywords: electronic, optical and magnetic materials,atomic and molecular physics, and optics,condensed matter physics,electrical and electronic engineering ,/dk/atira/pure/subjectarea/asjc/2500/2504
Faculty \ School: Faculty of Science > School of Engineering
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Depositing User: LivePure Connector
Date Deposited: 04 Apr 2024 09:30
Last Modified: 12 Apr 2024 16:30
URI: https://ueaeprints.uea.ac.uk/id/eprint/94803
DOI: 10.1007/s10854-018-0515-x

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