Ultrasonically dispersed multi-composite strategy of NiCo2S4/Halloysite nanotubes/carbon: An efficient solid-state hybrid supercapacitor and hydrogen evolution reaction material

Surendra K. Shinde, Deepak P. Dubal, Hemraj M. Yadav, Ajay D. Jagadale, Nagesh Maile, Swapnil S. Karade, Dae Sung Lee, Dae Young Kim

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Herein, we have developed a novel hybrid material based on NiCo2S4 (NCS), halloysite nanotubes (HNTs), and carbon as promising electrodes for supercapacitors (SCs). Firstly, mesoporous NCS nanoflakes were prepared by co-precipitation method followed by physically mixing with HNTs and carbon, and screen printed on nickel foam. After ultrasonication, a uniform distribution of the Carbon/HNTs complex was observed, which was confirmed by surface morphological analysis. When used as electrode material, the NCS/HNTs/C hybrid displayed a maximum specific capacity of 544 mAh g−1 at a scan rate of 5 mV s−1. Later, a solid-state hybrid SCs was fabricated using activated carbon (AC) as the negative and NCS/HNTs/C as the positive electrode (NCS/HNTs/C//AC). The device delivers a high energy density of 42.66 Wh kg−1 at a power density of 8.36 kW kg−1. In addition, the device demonstrates long-term cycling stability. Furthermore, the optimized NCS, NCS/HNTs, and NCS/HNTs/C nanocomposites also presented superior hydrogen evolution reaction (HER) performance of 201, 169, and 116 mV in the acidic bath at a current density of 10 mA cm−2, respectively. Thus, the synthesis of NCS/HNTs/C nanocomposite as positive electrodes for hybrid SCs opens new opportunities for the development of next-generation high energy density SCs.

Original languageEnglish
Pages (from-to)25020-25033
Number of pages14
JournalCeramics International
Volume48
Issue number17
DOIs
StatePublished - 1 Sep 2022

Keywords

  • Carbon
  • Halloysites
  • Hybrid supercapacitors
  • Hydrogen evolution reaction
  • NiCoS
  • Solid-state hybrid device
  • Ultrasonication treatment

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