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Full-Text Articles in Engineering

Impact Of Calendering And Silver Addition To Carbon Nanotube-Based Electrodes Used In Printed Multi-Layer Capacitors, Ramea Awni Al-Mubarak Aug 2015

Impact Of Calendering And Silver Addition To Carbon Nanotube-Based Electrodes Used In Printed Multi-Layer Capacitors, Ramea Awni Al-Mubarak

Masters Theses

As the demand for global energy increases, the need for development of alternative clean and sustainable energy technology increases. Creating advanced energy devices with a large storage capacity plays a significant role in this development. This research focused on investigating the performance of capacitor devices used as energy storage cells by optimizing and determining the impact of silver percentage and structure (nano-wires or silver flake) added to CNT ink on the conductivity of printed layers, and studying the influence of calendering the multi-layer capacitor electrodes. Multi-layer capacitors were fabricated by screen printing three alternative layers of conductive and dielectric inks …


Determination Of Work Functions In The Ta1-XAlXNY/Hfo2 Advanced Gate Stack Using Combinatorial Methodology, Kao-Shuo Chang, Martin Green, Jason Hattrick-Simpers, Ichiro Takeuchi, J. Suehle, O. Celik, S. De Gendt Mar 2015

Determination Of Work Functions In The Ta1-XAlXNY/Hfo2 Advanced Gate Stack Using Combinatorial Methodology, Kao-Shuo Chang, Martin Green, Jason Hattrick-Simpers, Ichiro Takeuchi, J. Suehle, O. Celik, S. De Gendt

Jason R. Hattrick-Simpers

No abstract provided.


Self-Supported Printed Multi-Layer Capacitors, Michael James Joyce Aug 2014

Self-Supported Printed Multi-Layer Capacitors, Michael James Joyce

Masters Theses

The increasing demand for miniaturized electronic devices has increased the need for rechargeable micro-power sources. Although lithium and lithium ion batteries have been utilized in these applications since the late 1990s, other energy harvesting technologies, such as thermal, mechanical, and solar, are now being used to augment batteries to enable systems to be self-powered. However, the lifetime of any battery is finite, which may be a major problem when the application is in a permanent structure or medical implant device. For power or significant energy storage applications, printed multilayer capacitors or supercapacitors are being explored as an enhancement, or replacement …


Characterization Of Sol-Gel-Derived Cobalt Oxide Xerogels As Electrochemical Capacitors, Chuan Lin, James A. Ritter, Branko N. Popov Jan 1998

Characterization Of Sol-Gel-Derived Cobalt Oxide Xerogels As Electrochemical Capacitors, Chuan Lin, James A. Ritter, Branko N. Popov

Faculty Publications

Very fine cobalt oxide xerogel powders were prepared using a unique solution chemistry associated with the sol-gel process. The effect of thermal treatment on the surface area, pore volume, crystallinity, particle structure, and corresponding electrochemical properties of the resulting xerogels was investigated and found to have significant effects on all of these properties. The xerogel remained amorphous as Co(OH)2 up to 160°C, and exhibited maxima in both the surface area and pore volume at this temperature. With an increase in the temperature above 200°C, both the surface area and pore volume decreased sharply, because the amorphous Co(OH)2 decomposed …