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<p>Addressing the environmental, economic, and social challenges posed by Sargassum macroalgae invasions along the Mexican Caribbean coast; this study presents a low-cost, low-temperature procedure to obtain activated carbon (AC) capable of storing energy. The raw material, <i>Sargassum natans</i> and <i>Sargassum fluitans,</i> underwent a single chemical wash with HCl and deionized water prior to activation at temperatures of 200, 400, and 600&#xa0;°C. Structural characterizations (Raman and FTIR) revelated modifications in the graphitic structure, achieving an I<sub>D</sub>/I<sub>G</sub> ratio of one and observing changes in C–O functional groups, which improved the material’s resistivity and conductivity. SEM analysis showed a porous network on the AC grains surfaces. Electrochemical studies CV, EIS, and GCD assessed the capacitive response in a two-electrode system, with findings indicating that higher activation temperatures reduce pseudocapacitive effects, yielding quasi-rectangular shapes indicative of electric double-layer capacitor (EDLC) behavior. A specific capacitance of approximately 12&#xa0;mFg<sup>−1</sup> was obtained for the 400&#xa0;°C sample after only 60 cycles, making the carbonaceous material derived from sargassum highly suitable for energy storage applications.</p> Graphical abstract <p></p>

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Harnessing Sargassum seaweed for the next generation of supercapacitors: a sustainable approach to advanced energy storage solutions

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年8月10日

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  • Claudia Antonio-Hernández,
  • Mauricio Pacio-Castillo,
  • Abraham Pacio-Castillo,
  • Mirna Valdez-Hernández,
  • Laura E. Serrano-de-la-Rosa,
  • Edith Osorio-de-la-Rosa

摘要

Addressing the environmental, economic, and social challenges posed by Sargassum macroalgae invasions along the Mexican Caribbean coast; this study presents a low-cost, low-temperature procedure to obtain activated carbon (AC) capable of storing energy. The raw material, Sargassum natans and Sargassum fluitans, underwent a single chemical wash with HCl and deionized water prior to activation at temperatures of 200, 400, and 600 °C. Structural characterizations (Raman and FTIR) revelated modifications in the graphitic structure, achieving an ID/IG ratio of one and observing changes in C–O functional groups, which improved the material’s resistivity and conductivity. SEM analysis showed a porous network on the AC grains surfaces. Electrochemical studies CV, EIS, and GCD assessed the capacitive response in a two-electrode system, with findings indicating that higher activation temperatures reduce pseudocapacitive effects, yielding quasi-rectangular shapes indicative of electric double-layer capacitor (EDLC) behavior. A specific capacitance of approximately 12 mFg−1 was obtained for the 400 °C sample after only 60 cycles, making the carbonaceous material derived from sargassum highly suitable for energy storage applications.

Graphical abstract