Porous Ultrathin NiSe Nanosheet Networks on Nickel Foam for High-Performance Hybrid Supercapacitors

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

DOI

  • Dengfeng Yu, Harbin Institute of Technology
  • ,
  • Zhuo Li, Harbin Institute of Technology
  • ,
  • Gongyuan Zhao, Harbin Institute of Technology
  • ,
  • Hong Zhang, Harbin Institute of Technology
  • ,
  • Husnu Aslan
  • Jiwei Li, Harbin Institute of Technology
  • ,
  • Feifei Sun, Harbin Institute of Technology
  • ,
  • Lin Zhu, Harbin Institute of Technology
  • ,
  • Baosheng Du, Harbin Institute of Technology
  • ,
  • Bin Yang, Harbin Institute of Technology
  • ,
  • Wenwu Cao, Harbin Institute of Technology
  • ,
  • Ye Sun, Harbin Institute of Technology
  • ,
  • Flemming Besenbacher
  • Miao Yu, Harbin Institute of Technology

Transition metal selenides (TMSs) with excellent electrochemical activity and high intrinsic electrical conductivity have attracted considerable attention owing to their potential use in energy storage devices. However, the low energy densities of the reported TMSs, which originate from the small active surface area and poor electrolyte ion mobility, substantially restrict their application potential. In this work, porous ultrathin nickel selenide nanosheet networks (NiSe NNs) on nickel foam are fabricated by using a novel, facile method, that is, selenylation/pickling of the pre-formed manganese-doped α-Ni(OH) 2. Removal of Mn resulted in NNs with a highly porous structure. The 3D framework of the NNs and the inherent nature of the NiSe affords high ion mobility, abundant accessible activated sites, vigorous electrochemical activity, and low resistance. One of the highest specific capacities of TMSs ever reported, that is, 443 mA h g −1 (807 μAh cm −2) at 3.0 A g −1, is achieved with the NNs as electrodes. The assembled NiSe NNs//porous carbon hybrid supercapacitor delivers a high energy density of 66.6 Wh kg −1 at a power density of 425 W kg −1, with excellent cycling stability. This work provides a new strategy for the production of novel electrode materials that can be applied in high-performance hybrid supercapacitors, and a fresh pathway towards commercial applications of hybrid supercapacitors based on TMS electrodes.

Original languageEnglish
JournalChemSusChem
Volume13
Issue1
Pages (from-to)260-266
Number of pages7
ISSN1864-5631
DOIs
Publication statusPublished - Jan 2020

    Research areas

  • 3D network, electrochemistry, hybrid supercapacitor, porous nanosheets, transition metal, NANOTUBE ARRAYS, HYDROXIDE, BATTERY, EFFICIENT

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