Air Brush Fabricated Carbon Nanotube Supercapacitor Electrodes

Report No. ARL-TR-5368
Authors: Matthew H. Ervin and Benjamin S. Miller
Date/Pages: September 2010; 22 pages
Abstract: Carbon nanotube (CNT) films have a high surface area, as well as outstanding physical and chemical stability. When used in creating a supercapacitor electrode, CNTs can result in increased specific capacitance and a lower electrode resistance relative to commercial activated carbon electrodes. The result will be a supercapacitor with increased energy and power density, making supercapacitors better suited for a variety of Army specific applications. This paper reports on the design, fabrication, and testing of supercapacitor electrodes made from single-walled carbon nanotubes (SWCNT), where the CNTs were deposited on the substrate using a spray deposition technique. The CNTs were suspended in acetone or water prior to being sprayed onto the substrate with an airbrush. Other factors are analyzed in the report, including which electrolyte to use as well as the most effective method for spraying the SWCNTs onto a conductive substrate.
Distribution: Approved for public release
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Last Update / Reviewed: September 1, 2010