• Characterization of Ag/Ag2SO4 system as reference electrode for in-situ electrochemical studies of advanced aqueous supercapacitors'

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    • Keywords


      Silver sulfate reference electrode; neutral aqueous electrolytes; asymmetric supercapacitor.

    • Abstract


      Silver metal covered by Ag2SO4 was investigated as a reference electrode for flat three-electrodecells. The potential stability of the Ag/Ag2SO4 electrode in neutral aqueous solutions utilized as electrolytesfor asymmetric high-voltage supercapacitors is reported. It was found that the potential drift and temperature coefficient of this reference electrode are insignificant. Its use as an alternative to the Ag/AgCl electrode enablesone to avoid the contamination of the supporting electrolyte solution by Cl- anions, which are oxidized earlierthan water molecules and other oxygen-containing anions SO2-4 or NO-3. Using the data obtained from threeelectrodeelectrochemical measurements with the electrode in question, a graphene–carbon nanotube/ MnO2 supercapacitor cell accumulating 9.8 Wh kg-1 of specific energy at 1.75 V was built.

    • Author Affiliations



      1. Joint Department of Electrochemical Energy Systems, 38A Vernadsky Ave, 03680 Kyiv, Ukraine
      2. National Technical University of Ukraine “KPI”, 37 Peremohy Ave, 03056, Kyiv, Ukraine
    • Dates

  • Journal of Chemical Sciences | News

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