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Nanomaterial Functionalized Carbon Fiber-Reinforced Composites with Energy Storage Capabilities.

Venkatesh Gangipamula1,2, Karamat Subhani1, Peter J Mahon3

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Nanomaterials (Basel, Switzerland)
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Researchers developed advanced carbon fiber composites by coating them with reduced graphene oxide and activated carbon. This dual coating significantly enhances energy storage, creating structural supercapacitors for potential use in aerospace and automotive applications.

Keywords:
active surface areacarbon fibercarbon-based nanomaterialsenergy storage device (ESD)functionalizationstructural supercapacitor (SSC)

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Developing advanced materials for energy storage is crucial for modern technologies.
  • Carbon fiber composites offer structural integrity but often lack integrated energy storage functions.
  • Enhancing the surface properties of carbon fibers can improve their electrochemical performance.

Purpose of the Study:

  • To investigate the surface modification of carbon fibers using reduced graphene oxide (rGO) and cellulose-based activated carbon.
  • To enhance the energy storage capacitance of carbon fibers for structural supercapacitor applications.
  • To evaluate the electrochemical performance and stability of the developed structural supercapacitors.

Main Methods:

  • Surface modification of carbon fibers via dual coating with rGO and activated carbon.
  • Fabrication of electrochemical supercapacitors using the surface-functionalized carbon fibers.
  • Electrochemical characterization including specific capacitance and cycling stability measurements.
  • Fabrication and testing of a symmetrical structural supercapacitor (SSSC) device.

Main Results:

  • Dual coating achieved a ~210-fold increase in surface area compared to pristine carbon fibers.
  • Developed a well-connected fiber-graphene-activated carbon network.
  • Achieved a specific capacitance of 172 F g-1 in an aqueous electrolyte and 227 mF g-1 for the SSSC device.
  • Demonstrated excellent electrochemical stability with 97.3% capacitance retention over 10,000 cycles.
  • Successfully powered an LED using the proof-of-concept SSSC device.

Conclusions:

  • Surface functionalization of carbon fibers with rGO and activated carbon significantly enhances energy storage capabilities.
  • The developed structural supercapacitors exhibit high performance, stability, and potential for integrated energy storage.
  • These advanced carbon fiber composites hold promise for structural and functional applications in aerospace and automotive industries.