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Related Experiment Videos

A novel carbon electrode material for highly improved EDLC performance.

Baizeng Fang1, Leo Binder

  • 1Institute for Chemical Technology of Inorganic Materials, Graz University of Technology, Stremayrgasse 16/III, A-8010 Graz, Austria. fang@TUGraz.at

The Journal of Physical Chemistry. B
|April 14, 2006
PubMed
Summary

Researchers developed a novel carbon electrode by grafting vinyltrimethoxysilane (vtmos) for electric double layer capacitors (EDLCs). This modification enhances energy storage performance, especially at high discharge rates.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Porous materials are key for energy storage applications.
  • Chemical surface modification offers a route to enhance material properties.
  • Activated carbon is a common electrode material for electric double layer capacitors (EDLCs).

Purpose of the Study:

  • To report the first practical realization of a novel carbon electrode for energy storage.
  • To investigate the effects of vinyltrimethoxysilane (vtmos) functional group grafting on activated carbon.
  • To evaluate the performance of the modified electrode in electric double layer capacitors (EDLCs).

Main Methods:

  • Chemical surface modification of activated carbon by grafting vinyltrimethoxysilane (vtmos).

Related Experiment Videos

  • Characterization of the modified activated carbon's surface properties, including hydrophobisation and affinity for propylene carbonate (PC) solvent.
  • Fabrication and testing of electrodes using the modified carbon in EDLCs with PC-based electrolytes.
  • Evaluation of EDLC performance metrics such as specific capacitance, energy density, and power capability at various discharge rates.

    • Main Results:

    • Surface modification with vtmos enhanced the hydrophobisation of activated carbon and its affinity for PC solvent.
    • Improved wettability of the modified carbon in PC-based electrolytes led to lower ion transport resistance.
    • A larger usable surface area for electric double layer formation was observed, resulting in higher specific capacitance.
    • The modified carbon electrode demonstrated significantly improved energy density and power capability, particularly at higher discharge rates.

    Conclusions:

    • Grafting vinyltrimethoxysilane (vtmos) onto activated carbon is a successful strategy for enhancing EDLC performance.
    • The modified carbon electrode offers superior energy density and power capability, making it suitable for high-current applications.
    • This novel modified carbon material shows great promise as an electrode for advanced energy storage devices.