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<p>This study explores the impact of electrode mass loading on the charge storage mechanism of activated carbon (AC) derived from coconut shell waste. Electrodes were fabricated using three binders—cornstarch, Nafion, and PVDF—to assess their influence on charge storage behavior. While all binders exhibited similar surface conductivity due to high carbon content, their hydrophobicity varied, with cornstarch being the least hydrophobic. Cyclic voltammetry revealed significant binder type and mass loading effects on specific capacitance. Cornstarch, being hydrophilic, allowed a mass loading of 2&#xa0;mg/cm<sup>2</sup> and predominantly exhibited an EDLC mechanism, contributing 98% of total capacitance at 200&#xa0;mV/s. Nafion showed optimal performance up to 1&#xa0;mg/cm<sup>2</sup>, while PVDF excelled at low mass loadings (&lt; 0.4&#xa0;mg/cm<sup>2</sup>) but had limited performance at higher loadings (&gt; 1&#xa0;mg/cm<sup>2</sup>) due to restricted ion diffusion.</p> Graphical abstract <p></p>

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Enhancing supercapacitor performance: evaluating the impact of binder type and mass loading on charge storage mechanisms

  • 期刊论文

  • 发表日期：

    2025年3月17日

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  • Mostafa M. Omran,
  • Delvin Aman,
  • Ahmed Galal

摘要

This study explores the impact of electrode mass loading on the charge storage mechanism of activated carbon (AC) derived from coconut shell waste. Electrodes were fabricated using three binders—cornstarch, Nafion, and PVDF—to assess their influence on charge storage behavior. While all binders exhibited similar surface conductivity due to high carbon content, their hydrophobicity varied, with cornstarch being the least hydrophobic. Cyclic voltammetry revealed significant binder type and mass loading effects on specific capacitance. Cornstarch, being hydrophilic, allowed a mass loading of 2 mg/cm2 and predominantly exhibited an EDLC mechanism, contributing 98% of total capacitance at 200 mV/s. Nafion showed optimal performance up to 1 mg/cm2, while PVDF excelled at low mass loadings (< 0.4 mg/cm2) but had limited performance at higher loadings (> 1 mg/cm2) due to restricted ion diffusion.

Graphical abstract