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Cu 4 SnS 4 -Functionalized Absorbent Pads-Derived Carbon as a Bifunctional Electrode for Supercapacitors and Hydrogen Evolution Reaction.

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Title: Cu 4 SnS 4 -Functionalized Absorbent Pads-Derived Carbon as a Bifunctional Electrode for Supercapacitors and Hydrogen Evolution Reaction.
Authors: Justinabraham, Romiyo1,2 (AUTHOR), Durairaj, Arulappan2,3,4,5 (AUTHOR), Luong, John H. T.3,6 (AUTHOR), Vasanthkumar, Samuel4,7 (AUTHOR), Maruthapandi, Moorthy4,5 (AUTHOR)
Source: Nanomaterials (2079-4991). Jun2026, Vol. 16 Issue 12, p773. 17p.
Subjects: Supercapacitors, Hydrogen evolution reactions, Energy storage, Copper sulfide, Carbon composites, Electrochemical apparatus, Organic wastes, Condensed matter
Abstract: The conversion of bio-waste into functional energy materials provides a robust platform for addressing both environmental and energy challenges. In this paper, discarded absorbent pads are transformed into carbon-rich frameworks, which is followed by the fabrication of composites through the incorporation of Cu4SnS4 (CSS) for dual electrochemical applications. Integrating CSS into the waste-derived carbon matrix induces strong synergistic effects, improving electrical conductivity, increasing active-site availability, and accelerating charge-transfer kinetics. Comprehensive physicochemical analyses confirmed the successful formation of a well-integrated heterostructure composite with favorable structural and surface characteristics. Electrochemical evaluations further demonstrated that CSS-modified carbon exhibits superior bifunctional performance. In a two-electrode configuration, the composite delivers an energy density of 12.08 Wh kg−1 at a power density of 250 W kg−1 along with excellent cycling stability in supercapacitor applications. As an electrocatalyst, it achieves a low overpotential of 268 mV at −10 mA cm−2 and a small Tafel slope of 75 mV dec−1, reflecting efficient reaction kinetics. The strong durability observed in both systems underscores the structural integrity and long-term operational stability of the material. Overall, this paper advances a sustainable waste-to-resource strategy for fabricating multifunctional carbon-based composites, offering a promising platform for integrated energy-storage and hydrogen-generation technologies. [ABSTRACT FROM AUTHOR]
Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Cu 4 SnS 4 -Functionalized Absorbent Pads-Derived Carbon as a Bifunctional Electrode for Supercapacitors and Hydrogen Evolution Reaction.
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  Data: <searchLink fieldCode="AR" term="%22Justinabraham%2C+Romiyo%22">Justinabraham, Romiyo</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Durairaj%2C+Arulappan%22">Durairaj, Arulappan</searchLink><relatesTo>2,3,4,5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Luong%2C+John+H%2E+T%2E%22">Luong, John H. T.</searchLink><relatesTo>3,6</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Vasanthkumar%2C+Samuel%22">Vasanthkumar, Samuel</searchLink><relatesTo>4,7</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Maruthapandi%2C+Moorthy%22">Maruthapandi, Moorthy</searchLink><relatesTo>4,5</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Nanomaterials+%282079-4991%29%22">Nanomaterials (2079-4991)</searchLink>. Jun2026, Vol. 16 Issue 12, p773. 17p.
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  Data: <searchLink fieldCode="DE" term="%22Supercapacitors%22">Supercapacitors</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrogen+evolution+reactions%22">Hydrogen evolution reactions</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+storage%22">Energy storage</searchLink><br /><searchLink fieldCode="DE" term="%22Copper+sulfide%22">Copper sulfide</searchLink><br /><searchLink fieldCode="DE" term="%22Carbon+composites%22">Carbon composites</searchLink><br /><searchLink fieldCode="DE" term="%22Electrochemical+apparatus%22">Electrochemical apparatus</searchLink><br /><searchLink fieldCode="DE" term="%22Organic+wastes%22">Organic wastes</searchLink><br /><searchLink fieldCode="DE" term="%22Condensed+matter%22">Condensed matter</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: The conversion of bio-waste into functional energy materials provides a robust platform for addressing both environmental and energy challenges. In this paper, discarded absorbent pads are transformed into carbon-rich frameworks, which is followed by the fabrication of composites through the incorporation of Cu4SnS4 (CSS) for dual electrochemical applications. Integrating CSS into the waste-derived carbon matrix induces strong synergistic effects, improving electrical conductivity, increasing active-site availability, and accelerating charge-transfer kinetics. Comprehensive physicochemical analyses confirmed the successful formation of a well-integrated heterostructure composite with favorable structural and surface characteristics. Electrochemical evaluations further demonstrated that CSS-modified carbon exhibits superior bifunctional performance. In a two-electrode configuration, the composite delivers an energy density of 12.08 Wh kg−1 at a power density of 250 W kg−1 along with excellent cycling stability in supercapacitor applications. As an electrocatalyst, it achieves a low overpotential of 268 mV at −10 mA cm−2 and a small Tafel slope of 75 mV dec−1, reflecting efficient reaction kinetics. The strong durability observed in both systems underscores the structural integrity and long-term operational stability of the material. Overall, this paper advances a sustainable waste-to-resource strategy for fabricating multifunctional carbon-based composites, offering a promising platform for integrated energy-storage and hydrogen-generation technologies. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.3390/nano16120773
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      – Code: eng
        Text: English
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      – SubjectFull: Supercapacitors
        Type: general
      – SubjectFull: Hydrogen evolution reactions
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      – SubjectFull: Energy storage
        Type: general
      – SubjectFull: Copper sulfide
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      – SubjectFull: Carbon composites
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      – SubjectFull: Electrochemical apparatus
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      – SubjectFull: Organic wastes
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      – SubjectFull: Condensed matter
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      – TitleFull: Cu 4 SnS 4 -Functionalized Absorbent Pads-Derived Carbon as a Bifunctional Electrode for Supercapacitors and Hydrogen Evolution Reaction.
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              Text: Jun2026
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              Y: 2026
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