GEORGIA INSTITUTE OF TECHNOLOGY

 Under the provisions of the regulations for the degree

MASTER OF SCIENCE

on Friday, July 21, 2017

11:30 AM
in MRDC 2405

will be held the

 THESIS DEFENSE

for

Tyler Colling

 "Chip Scale Carbon Nanotube Based Supercapacitors and Ionic Liquid Electrolytes"

 Committee Members:

Dr. W. Jud Ready, Advisor, MSE

Dr. Valerie Scott, NASA JPL

Dr. Eric Vogel, MSE

Abstract:

Efficient and clean energy storage is being demanded for use in a variety of technologies. In particular, the internet of things requires chip scale, high energy and power density energy storage with high cyclability. Batteries do not meet this need due to a lack of power density and poor cyclability. Capacitors do not have the required energy density. This separation of storage capabilities creates a need for supercapacitors, a technology that maintains high energy density, power density, and cyclability. Supercapacitors can utilize two storage mechanisms, the Helmholtz double layer (non-faradaic) and pseudocapacitance (faradaic). In this work, a chip scale, silicon based, embedded carbon nanotube based electrode is presented with four functionalizatons (TiO_x, TiN_x, ZrO_x, ZrN_x), introduced through atomic layer deposition, and five ionic liquid electrolytes. Each sample was tested with cyclic voltammetry, galvanostatic methods, and impedance spectroscopy to measure the capacitance and equivalent series resistance.