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Electrochemical performance enhancement of high mass loading H-RuO 2 NPs electrode and aqueous symmetrical supercapacitor in the neutral electrolyte

Journal of Energy Storage, ISSN: 2352-152X, Vol: 30, Page: 101453
2020
  • 23
    Citations
  • 0
    Usage
  • 15
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    23
    • Citation Indexes
      23
  • Captures
    15

Article Description

In this work, high water content hydrous ruthenium oxide nanoparticles (H-RuO 2 NPs) were synthesized using gallic acid monohydrate as a reducing agent. X-ray diffraction and transmission electron microscopy results confirmed the formation of irregular shape H-RuO 2 NPs with an average size of 5 nm. The thermogravimetric study showed that the synthesized H-RuO 2 NPs content more than 70 % of water which makes it specifically suitable for the electrochemical application. Moreover, it was observed that increasing the mass loading of synthesized H-RuO 2 NPs from 0.5 mg cm −2 to 8 mg cm −2, the specific capacitance decreased from 676 to 217 Fg −1 at a scan rate of 5 mVs −1 in 1 M Na 2 SO 4 electrolyte. Furthermore, the aqueous symmetrical supercapacitor with a total mass loading of 16 mg cm −2 exhibited a specific capacitance of 62 Fg −1 at a scan rate of 1 mVs −1 and the specific capacitance retention rate of 91.4 % was observed after 5000 cycles at a current density of 5 Ag −1.

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