Determination and enhancement of the capacitance contributions in carbon nanotube based electrode systems

Hoefer, M.; Bandaru, P. R.
November 2009
Applied Physics Letters;11/2/2009, Vol. 95 Issue 18, p183108
Academic Journal
We characterize the methodology of, and a possible way to enhance, the capacitance of carbon nanotube (CNT) electrode based electrochemical capacitors. Argon irradiation was used to controllably incorporate extrinsic defects into CNTs and increase the magnitude of both the pseudocapacitance and double-layer capacitance by as much as 50% and 200%, respectively, compared to untreated electrodes. Our work has implications in analyzing the prospects of CNT based electrochemical capacitors, through investigating ways and means of improving their charge storage capacity and energy density.


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