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Capacitor properties of 3D hierarchical structured electrodes prepared by one-step electrodeposition of cobalt nanowires on stainless steel fiber sheets

Electrochemistry communications, 2022-08, Vol.141, p.107346, Article 107346 [Peer Reviewed Journal]

2022 The Authors ;ISSN: 1388-2481 ;EISSN: 1873-1902 ;DOI: 10.1016/j.elecom.2022.107346

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  • Title:
    Capacitor properties of 3D hierarchical structured electrodes prepared by one-step electrodeposition of cobalt nanowires on stainless steel fiber sheets
  • Author: Muramatsu, Daisuke ; Magori, Aoi ; Tsukada, Satoru ; Hoshino, Katsuyoshi
  • Subjects: 3D hierarchical structure ; Capacitance ; Cobalt nanowire ; Redox capacitor ; SUS fiber sheet
  • Is Part Of: Electrochemistry communications, 2022-08, Vol.141, p.107346, Article 107346
  • Description: [Display omitted] •A stainless steel fiber sheet was used as the current collector for redox capacitors.•The fiber sheet was successfully loaded with cobalt nanowires (CoNWs).•The CoNW-loaded fiber sheet exhibited a capacitance of 880 F g−1 at 1.8 A g−1.•Ni plating on the fiber sheet and repeated operation further doubled the capacity. Redox or pseudo-capacitors using a cobalt (II) hydroxide (Co(OH)2) material have been regarded as promising options for renewable energy storage. In this study, we deposited cobalt nanowires with a Co(OH)2 surface layer on a newly developed stainless steel fiber sheet by a one-step electrodeposition method, without any templates, to form a 3D hierarchical structured electrode. This electrode achieved a specific capacitance of 880 F g−1 at a current density of 1.8 A g−1, which is much higher than the values attained with cobalt-nanowire-deposited stainless steel (200 F g−1) and indium-tin-oxide-coated glass (455 F g−1) plates. Moreover, the cobalt nanowire electrode coupled with a nickel-plated stainless steel fiber sheet exhibited increasing capacitance performance with repeated charge–discharge cycles, eventually developing approximately twice the capacity of the above electrode. These results demonstrate the potential of stainless steel fiber sheets for developing high-performance redox capacitors using a very facile method.
  • Publisher: Elsevier B.V
  • Language: English
  • Identifier: ISSN: 1388-2481
    EISSN: 1873-1902
    DOI: 10.1016/j.elecom.2022.107346
  • Source: DOAJ Directory of Open Access Journals
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