Aligned Graphene Carbon Nanotubes as 3D Electrodes

Technology #ua15-029

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Researchers
Scott Tan
Undergraduate Student, Optical Science
Palash Gangopadhyay
Adjunct Research Professor, Optical Sciences
Managed By
Amy Phillips
Sr. Licensing Manager (520) 621-9579

Invention

Researchers at the University of Arizona have succeeded in fabricating 3D nanostructured carbon electrodes in a novel method that is fast and inexpensive, using graphene and magnetic field aligned carbon nanotubes. The highly porous structure, in combination with enhanced networks of conductive paths in the electrode has been shown to increase active surface area of the electrode by many-fold, thereby increasing its performance. The electrodes can be used in other electrochemical devices as well, such as glucose monitor, bio-analytic sensors etc. When formed into a supercapacitor, the resulting aligned activated carbon graphene nanotube (AGCN) supercapacitor showed twice the capacitance and significant improvement of energy density compared to unaligned ACGN supercapacitors.

Background

Current methods of making graphene-carbon nanotube hybrid materials suffer from numerous limitations, including poor performance in efficiency, structural integrity, electrical conductivity, reduced porosity, and large scale bulk processing. Current methods also lack the ability to fine tune alignment of carbon nanotubes and graphene with respect to each other to create a true three dimensional electrode structure. Therefore, a need exists for more effective methods of making aligned graphene - nanotube hybrid electrode materials that are amenable to large scale bulk processing and provide electrodes with high surface area, high porosity, and enhanced structural integrity.

Advantages

  • Relatively simple method for aligning the ACGNs
  • Superior capacitance and energy density

Applications

  • Supercapacitors
  • Glucose monitors
  • Bio-analytic sensors

Inventors

Palash Gangopadhyay

Scott Howard

Contact

Amy Phillips

Licensing Manager, Tech Launch Arizona

AmyP@TLA.arizona.edu