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    High energy density supercapacitors using macroporous kitchen sponges

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    Type
    Article
    Authors
    Chen, Wei
    Baby, Rakhi Raghavan
    Alshareef, Husam N. cc
    KAUST Department
    Advanced Membranes and Porous Materials Research Center
    Functional Nanomaterials and Devices Research Group
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2012
    Permanent link to this record
    http://hdl.handle.net/10754/562001
    
    Metadata
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    Abstract
    Macroporous, low-cost and recyclable kitchen sponges are explored as effective electrode platforms for supercapacitor devices. A simple and scalable process has been developed to fabricate MnO 2-carbon nanotube (CNT)-sponge supercapacitor electrodes using ordinary kitchen sponges. Two organic electrolytes (1 M of tetraethylammonium tetrafluoroborate (Et 4NBF 4) in propylene carbonate (PC), 1 M of LiClO 4 in PC) are utilized with the sponge-based electrodes to improve the energy density of the symmetrical supercapacitors. Compared to aqueous electrolyte (1 M of Na 2SO 4 in H 2O), the energy density of supercapacitors tripled in Et 4NBF 4 electrolyte, and further increased by six times in LiClO 4 electrolyte. The long-term cycling performance in different electrolytes was examined and the morphology changes of the electrode materials were also studied. The good electrochemical performance in both aqueous and organic electrolytes indicates that the MnO 2-CNT-sponge is a promising low-cost electrode for energy storage systems. © 2012 The Royal Society of Chemistry.
    Citation
    Chen, W., Rakhi, R. B., & Alshareef, H. N. (2012). High energy density supercapacitors using macroporous kitchen sponges. Journal of Materials Chemistry, 22(29), 14394. doi:10.1039/c2jm32030d
    Sponsors
    The authors wish to thank the Imaging and Characterization Core Facility and the Analytical Chemistry Core Laboratory for their support. W. C. acknowledges support from the KAUST Graduate Fellowship. H. A. acknowledges the support from KAUST baseline fund.
    Publisher
    Royal Society of Chemistry (RSC)
    Journal
    Journal of Materials Chemistry
    DOI
    10.1039/c2jm32030d
    ae974a485f413a2113503eed53cd6c53
    10.1039/c2jm32030d
    Scopus Count
    Collections
    Articles; Advanced Membranes and Porous Materials Research Center; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program

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