• Supercapacitor fabricated with 30 M KOH electrolyte and highly stable Pd$_4$S electrodes

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      https://www.ias.ac.in/article/fulltext/boms/044/0213

    • Keywords

       

      Pd$_4$S; supercapacitor; corrosive-resistant; molecular precursor; transition metal sulphide.

    • Abstract

       

      In this work, supercapacitors have been fabricated using Pd$_4$S electrode material which is highly conducting and chemically robust to the acid and alkali media. The synthesis strategy is simple and involves a single step thermolysis of palladium octanethiolate film in the H$_2$ atmosphere at 250°C for 1 h. Besides its conducting nature, its porous morphology makes it a suitable electrode material for supercapacitors. The electrochemical properties of the Pd4S were examined in harsh alkali media (30 M KOH). Typically, in the literature, only lower electrolyte concentration (1–6 M KOH) is preferred as the electrode may not withstand higher concentrations. Using the prepared Pd$_4$S film as supercapacitor electrode, a specific capacitance of 570 F g$^{-1}$ with energy and power densities of 28 Wh kg$^{-1}$ and 1.5 kW kg$^{-1}$, respectively, were achieved with 30 M KOH electrolyte. After 1500 cycles of charging and discharging with a constant current density of 1.75 A g$^{-1}$, more than 98% capacitance retention was observed.

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    • Author Affiliations

       

      S KIRUTHIKA1 GIRIDHAR U KULKARNI2

      1. Department of Physics, School of Electrical and Electronics Engineering (SEEE), SASTRA Deemed University, Thanjavur 613 401, India
      2. Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore 560064, India
    • Dates

       
  • Bulletin of Materials Science | News

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