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<p>Supercapacitor performance is greatly influenced by the type and concentration of electrolyte utilized. The optimal performance of the active substance is known to occur at a particular electrolyte concentration. This study examines how the concentration of electrolytes affects the metal sulfide-based oxide supercapacitor’s electrochemical performance. The exceptional characteristics of transition metal sulfides and their composites, such as their high conductivity, large surface area, and porosity, are attracting interest as electrode materials for energy storage devices. MoS₂/TiO₂ (3:7) nanostructure is synthesized and characterized in this paper at two distinct electrolyte concentrations (6 M &amp; 3&#xa0;M KOH). The electrochemical performance of the composite electrode created is also evaluated. Instead of using 3&#xa0;M KOH electrolyte, the produced composite electrode showed a markedly better electrochemical activity in 6&#xa0;M KOH due to the combined benefits of Mo-S/Ti-O electronic structures. As determined by ECSA using cyclic voltammetry (CV), the electrode’s specific capacity of 298&#xa0;F g⁻¹ at 1&#xa0;A g⁻¹ in 6&#xa0;M KOH aqueous electrolyte was better than 128&#xa0;F g⁻¹ in 3&#xa0;M KOH electrolyte through galvanostatic charge–discharge (GCD) experiments. The charge storage kinetics show that the intercalation process and surface phenomena work together to produce the highest specific capacitance. Additionally, using a MoS₂/TiO₂ (6&#xa0;M KOH) electrode as a positive electrode and activated carbon (AC) as a negative electrode, assembled asymmetric supercapacitors (ASCs) achieved an impressive specific capacitance of 158&#xa0;F g⁻¹, as well as energy and power density comparable to ∼27 Wh kg⁻¹ and 615&#xa0;W kg⁻¹ at 1&#xa0;A g⁻¹. Therefore, it seems that binary MoS₂/TiO₂ in 6&#xa0;M KOH electrolyte comparing with 3&#xa0;M shows better choice for energy storage devices operating in the potential range of (-0.8–0.3&#xa0;V).</p> Graphical Abstract <p></p>

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Molar concentration effect on the electrochemical performance of asymmetric MoS2/TiO2 composite-based supercapacitor application

  • 期刊论文

  • 发表日期：

    2026年2月2日

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  • Ghazala Yunus,
  • Muhammad Tauseef Qureshi,
  • Abdul Moiz Mohammad,
  • Lubna Aamir,
  • Azaa Mohammed Khaled,
  • Ala’a Nowara,
  • Sirajul Haq,
  • Syed Hatim Shah,
  • Dost Muhammad,
  • Nisar Ali,
  • Muhammad M. Hinnai

摘要

Supercapacitor performance is greatly influenced by the type and concentration of electrolyte utilized. The optimal performance of the active substance is known to occur at a particular electrolyte concentration. This study examines how the concentration of electrolytes affects the metal sulfide-based oxide supercapacitor’s electrochemical performance. The exceptional characteristics of transition metal sulfides and their composites, such as their high conductivity, large surface area, and porosity, are attracting interest as electrode materials for energy storage devices. MoS₂/TiO₂ (3:7) nanostructure is synthesized and characterized in this paper at two distinct electrolyte concentrations (6 M & 3 M KOH). The electrochemical performance of the composite electrode created is also evaluated. Instead of using 3 M KOH electrolyte, the produced composite electrode showed a markedly better electrochemical activity in 6 M KOH due to the combined benefits of Mo-S/Ti-O electronic structures. As determined by ECSA using cyclic voltammetry (CV), the electrode’s specific capacity of 298 F g⁻¹ at 1 A g⁻¹ in 6 M KOH aqueous electrolyte was better than 128 F g⁻¹ in 3 M KOH electrolyte through galvanostatic charge–discharge (GCD) experiments. The charge storage kinetics show that the intercalation process and surface phenomena work together to produce the highest specific capacitance. Additionally, using a MoS₂/TiO₂ (6 M KOH) electrode as a positive electrode and activated carbon (AC) as a negative electrode, assembled asymmetric supercapacitors (ASCs) achieved an impressive specific capacitance of 158 F g⁻¹, as well as energy and power density comparable to ∼27 Wh kg⁻¹ and 615 W kg⁻¹ at 1 A g⁻¹. Therefore, it seems that binary MoS₂/TiO₂ in 6 M KOH electrolyte comparing with 3 M shows better choice for energy storage devices operating in the potential range of (-0.8–0.3 V).

Graphical Abstract