Electrochemic properties of single-wall carbon nanotube electrodes

Authors

J. N. Barisci, University of Wollongong
G G. Wallace, University of WollongongFollow
D. Chattopadhyay, University of Conneticut, USA
F. Papadimitrakopoulos, University of Conneticut, USA
R. H. Baughman, University of Texas, USA

RIS ID

9999

Publication Details

This article was originally published as Barisci, JN, Wallace, GG, Chattopadhyay, D et al, Electrochemic properties of single-wall carbon nanotube electrodes, Journal of the Electrochemical Society, 150(9), 2003, E409-E415. Copyright The Electrochemical Society. Original journal available here.

Abstract

The electrochemical properties of single-wall carbon nanotube ~CNT! electrodes in the form of sheets or papers have been examined. Thermal annealing has produced significant changes in a range of properties of the material including increased hydrophobicity and elimination of electroactive surface functional groups and other impurities. As a result of these changes, the treated electrodes exhibit lower double-layer capacitance, absence of faradaic responses and associated pseudocapacitance, and a better frequency response. The basic electrochemical behavior of the CNT paper electrodes is not markedly affected by relatively large differences in electrolyte ion size, consistent with an average pore size of 9 nm. Increases in both CNT sheet thickness and surface area induce a slower electrode response in agreement with the porous nature of the electrode matrix.